Applying Hot Isostatic Fluid Pressure To Preform Using Surrounding Liquid (e.g., Molten Glass, Melted Tin, Etc.) Or Fluid Pressure-transmitting Deformable Sheath (e.g., Metal Foil, Etc.) Patents (Class 264/604)
  • Patent number: 11236002
    Abstract: One aspect relates to a process for the preparation of a quartz glass body. The process includes providing a silicon dioxide granulate from a pyrogenically produced silicon dioxide powder, making a glass melt out of silicon dioxide granulate, and making a quartz glass body out of at least part of the glass melt. The size of the quartz glass body is reduced to obtain a quartz glass grain. The quartz glass body is processed to make a preform and an opaque quartz glass body is made from the preform. One aspect further relates to an opaque quartz glass body which is obtainable by this process. One aspect further relates to a reactor and an arrangement, which are each obtainable by further processing of the opaque quartz glass body.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 1, 2022
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Matthias Otter, Michael Hünermann, Nils Christian Nielsen, Frank Wessely, Andreas Schreiber, Björn Roos, Gerrit Scheich
  • Patent number: 9428422
    Abstract: A pink-colored zirconia sintered body has a high sintered body density and strength, and a colored translucency, which has a color tone similar to teeth and excellent translucency and has high aesthetic properties. A colored translucent zirconia sintered body includes from 2 to 4 mol % of yttria, from 0.02 to 0.8 mol % of Er2O3, at least 20 and less than 2,000 ppm, as calculated as Fe2O3, of an iron compound, at least 0.005 and less than 0.2 wt % of Al2O3 and the rest being zirconia, and having a lightness L* of from 55 to 75, a* of from 0 to 10 and b* of from 0 to 30 as chromatic parameters stipulated in JIS-Z8729, has a relative density of at least 99.80% and has a total light transmittance of at least 18% and at most 40% as measured at a sample thickness of 1 mm using a D65 light source.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: August 30, 2016
    Inventors: Kiyotaka Kawamura, Hiroyuki Fujisaki
  • Publication number: 20150061199
    Abstract: (Problem) In conventional method for producing artificial graphite, in order to obtain a product having excellent crystallinity, it was necessary to mold a filler and a binder and then repeat impregnation, carbonization and graphitization, and since carbonization and graphitization proceeded by a solid phase reaction, a period of time of as long as 2 to 3 months was required for the production and cost was high and further, a large size structure in the shape of column and cylinder could not be produced. In addition, nanocarbon materials such as carbon nanotube, carbon nanofiber and carbon nanohorn could not be produced.
    Type: Application
    Filed: November 10, 2014
    Publication date: March 5, 2015
    Inventors: Kazuo MURAMATSU, Masahiro TOYODA
  • Patent number: 8945461
    Abstract: Provided is a production method of a ?-sialon phosphor that europium ions are solid-solved in ?-sialon, including a mixing process for mixing raw materials of the ?-sialon phosphor; a burning process for burning the raw materials after the mixing process to form the ?-sialon phosphor; a HIP treatment process in which the ?-sialon phosphor after the burning process is subjected to a HIP treatment; an annealing process in which the ?-sialon phosphor after the HIP treatment process is subjected to an annealing treatment; and an acid treatment process in which the ?-sialon phosphor after the annealing process is subjected to an acid treatment. According to the production method of a ?-sialon phosphor, a ?-sialon phosphor excellent in luminescence intensity is obtained.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: February 3, 2015
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tomohiro Nomiyama, Suzuya Yamada, Hisayuki Hashimoto
  • Publication number: 20150001449
    Abstract: Disclosed herein are a consolidated material and a method of consolidating a mixture of materials. The method can include providing a first material with the first material being substantially fully crystallized. The method may also include providing a second material, wherein the second material is partially crystallized. The method may further include combining the first material and the second material into a mixed material and consolidating the mixed material into a consolidated material. Further disclosed is a consolidated material made according to this method.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventor: Clinton T. Ballinger
  • Patent number: 8920706
    Abstract: Disclosed is a method for hot isostatic pressing a substrate. At first, a metal container is provided. Powder is filled in the metal container before the metal container is located in an oven. The metal container is subjected to isostatic pressing that includes heating and pressing. Thus, the metal container shrinks and presses on the powder evenly and turns the powder into a nugget. The metal container is moved out of the oven and broken to release the nugget. A substrate is cut from the nugget. With the hot isostatic pressing, the substrate exhibits only a few flaws and is large, fine, homogenous and strong so that the substrate is not vulnerable to deformation in a high-pressure environment.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: December 30, 2014
    Assignee: Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense
    Inventors: Yang-Kuao Kuo, Chia-Yi Hsiang, Ching-Hui ChiangLin, Fu-Hsing Huang
  • Publication number: 20140374931
    Abstract: A method for producing transparent ceramic objects having an RIT>10% in the wave length range of 300 nm to 4000 nm and a wall thickness of 2 mm. Said method consists of the following steps: producing a slip by dispersing a ceramic powder, the particle size of which is d50<5 ?m, preferably between 5 nm and 500 nm; producing a granular material, the particle size of which is d50<1 mm, preferably between 50 ?m and 500 ?m, more preferably between 80 ?m and 300 ?m, from the slip by means of fluidised bed granulation; pressing the granular material in a simple, non-cyclical manner to form a green body; sintering the green body to form a sintered body; and re-densifying the sintered body.
    Type: Application
    Filed: November 12, 2012
    Publication date: December 25, 2014
    Inventor: Lars Schnetter
  • Patent number: 8906288
    Abstract: Provided is a process for producing dense SiC fiber-bonded ceramics excellent in heat resistance and having a shape hard to form by hot pressing such as an elongated shape. The process for producing SiC fiber-bonded ceramics composed of: inorganic fiber made of SiC; and interfacial layers mainly made of carbon includes vacuum-sealing a preform, prepared by forming specific silicon carbide-based inorganic fiber into a certain shape, into a capsule and hot-isostatic-pressing the preform. The process is characterized in that the ratio of the number of carbon atoms to the number of silicon atoms in the preform is 1.02 to 1.20, and before the hot isostatic pressing, the preform is heated in an inert gas atmosphere or a reducing gas atmosphere at a temperature of 1200° C. to 1800° C. to adjust the oxygen content in the inorganic fiber to 6.0% by weight or lower, and then the hot isostatic pressing is carried out.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: December 9, 2014
    Assignee: Ube Industries, Ltd.
    Inventors: Kenji Matsunaga, Shinji Kajii, Tsutomu Kodama
  • Patent number: 8894913
    Abstract: The invention relates to a method for production of a cylindrical acid proof, seamless pressure vessel having hemispherical top and bottom by powder molding in an HIP (Hot Isostatic Pressing) process. Sheet metal molds are produced constituting an internal shell, lower part of an external shell, upper part of an external shell with filling spout with corresponding top and bottom. Distance pins decide the wall thickness and are mounted outward from the internal shell which is led down into the lower part of external shell whereafter shell part with filling spout closes the volume between the internal and external shells which is then filled with powder through the filling spout. The pressure vessel is placed in an HIP-process container for vacuuming, sealing, supply of high-pressure inert gas such as argon, at high temperature such as 1000° C., for processing together with the distance pins to a compact and homogenous material.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: November 25, 2014
    Assignee: Tool-Tech AS
    Inventor: Egil Eriksen
  • Publication number: 20140311902
    Abstract: Provided is an oxide-containing magnetic material sputtering target wherein the oxides have an average grain diameter of 400 nm or less. Also provided is a method of producing an oxide-containing magnetic material sputtering target. The method involves depositing a magnetic material on a substrate by the PVD or CVD method, then removing the substrate from the deposited magnetic material, pulverizing the material to obtain a raw material for the target, and further sintering the raw material. An object of the present invention is to provide a magnetic material target, in particular a nonmagnetic grain-dispersed ferromagnetic sputtering target capable of suppressing discharge abnormalities of oxides that are the cause of particle generation during sputtering.
    Type: Application
    Filed: February 26, 2013
    Publication date: October 23, 2014
    Applicant: JX Nippon Mining & Metals Corporation
    Inventors: Shin-ichi Ogino, Yuichiro Nakamura
  • Publication number: 20140234151
    Abstract: An apparatus for manufacturing an article from powder material includes a canister, a sorter, a plurality of hoppers and at least one valve. The canister has a predetermined internal shape to define the shape of the powder metal article. The sorter sorts the powder material by the size of the powder particles, the shape of the powder particles and/or the flow characteristics of the powder particles. The hoppers contain powder material with different sizes of powder particles, different shapes of powder particles and/or powder particles with different flow characteristics. The hoppers are arranged to supply the sorted powder material to the canister. The at least one valve controls the proportions of the different powder materials supplied from the one or more of the different hoppers into the canister to control the packing density of the powder material in the canister at all positions in the canister.
    Type: Application
    Filed: December 18, 2013
    Publication date: August 21, 2014
    Applicant: ROLLS-ROYCE PLC
    Inventors: Ian Colin Deuchar CARE, Daniel CLARK
  • Publication number: 20140162864
    Abstract: A method for producing a metal detectible ceramic, including mixing a first amount of ceramic material with a second metal oxide to define an admixture, forming the admixture into a green body, sintering the green body to yield a densified body, wherein the densified body has a plurality of metallic particles distributed therethrough, and wherein the densified body is detectible by a metal detector.
    Type: Application
    Filed: May 9, 2013
    Publication date: June 12, 2014
    Inventors: Michelene Hall, Thomas Blaszczykiewicz
  • Patent number: 8734712
    Abstract: A method for manufacturing a cutting insert green body from a sinterable powder, a tool set for manufacturing the cutting insert green body by that method and the green body manufactured by the tool set. The tool set has axially moving upper and lower punches and radially moving side punches. The side punches move slidably on die rods. The side punches and die rods move in channels in a base body on which a cover plate is mounted. The upper and lower punches move in through holes in the cover plate and base body, respectively. The die rods are stationary during compaction of the sinterable powder. The upper, lower and side punches form surfaces of the green body and the die rods form some of the edges of the green body. The green body can have undercuts and the edges formed by the die rods can be non-linear in shape.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: May 27, 2014
    Assignee: Iscar, Ltd.
    Inventors: Amir Satran, Alexander Zibenberg
  • Patent number: 8728382
    Abstract: In one aspect of the invention, a method of forming polycrystalline diamond comprises providing a can assembly comprising a preform of diamond powder with a first catalyst, the preform being adjacent a solid substrate with a second catalyst. The pressure and/or temperature on the can assembly increases until the first catalyst and carbon from the diamond powder begin to form a melting composition within the preform. The pressure and temperature may be held substantially constant on the can assembly until the melting composition has catalyzed crystalline growth in at least a portion of the preform. The pressure and/or temperature are then increased on the assembly until the second catalyst within the substrate is released into the preform.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: May 20, 2014
    Inventors: David R. Hall, Ronald B. Crockett
  • Patent number: 8722555
    Abstract: Translucent zirconia sintered bodies have had a problem that incorporation of titania improves translucency but lowers mechanical strength. The invention provides: a zirconia sintered body containing titanium oxide, the sintered body containing 6-15 mol % yttria and 3-20 mol % titania and having an in-line transmission of 50% or higher when examined at a sample thickness of 1 mm and a measuring wavelength of 600 nm; and a zirconia sintered body having especially high translucency which is a high-quality transparent zirconia sintered body that contains 3-20 mol % titania and 6-15 mol % yttria and has an in-line transmission, as measured at a wavelength of 600 nm, of 73% or higher and a haze value of 2.0% or less and that is highly translucent and is undimmed (cloudless). The invention further relates to a production process in which a powder having the composition is molded and thereafter subjected to ordinary-pressure primary sintering and hot isostatic pressing (HIP) under specific conditions.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: May 13, 2014
    Assignee: Tosoh Corporation
    Inventors: Isao Yamashita, Masayuki Kudou, Koji Tsukuma
  • Publication number: 20140094357
    Abstract: Provided is a method of manufacturing a transparent sesquioxide sintered body by which a transparent M2O3 type sesquioxide sintered body can be manufactured. A powder including particles of an oxide of at least one rare earth element selected from Y, Sc or lanthanide elements and Zr oxide particles is prepared as a raw material powder, wherein in the particle size distribution of the rare earth element oxide particles, or in the particle size distribution of secondary particles in the case where the rare earth element oxide particles are agglomerated to form the secondary particles, the particle diameter D2.5 value at which the cumulative particle amount from the minimum particle size side is 2.5% based on the total particle amount is in the range from 180 nm to 2000 nm, inclusive. The raw material powder is press molded into a predetermined shape, followed by sintering.
    Type: Application
    Filed: October 2, 2013
    Publication date: April 3, 2014
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masanori IKARI, Yoshihiro NOJIMA, Shinji MAKIKAWA, Akio IKESUE
  • Patent number: 8658083
    Abstract: This disclosure involves a new spinel and glass micro-composite material and process for making such. The composite has excellent transmission in the 0.5-5.0 ?m wavelength region suitable for various visible and mid IR applications utilizing windows, domes and other geometric shapes. The composite can be made at a temperature about 40% lower than the glass melting temperature and about 50% lower than the spinel sintering temperature. The composite material has high modulus and fracture toughness which are important for impact resistance in armor and other practical applications.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: February 25, 2014
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Shyam S. Bayya, Jasbinder S. Sanghera, Guillermo R. Villalobos, Ishwar D. Aggarwal
  • Publication number: 20140038808
    Abstract: A process for the fabrication of a SiC-based article that includes preparing an aqueous suspension with SiC powder, a titanium source, a carbon source and boron carbide powder, spray drying the mixture to obtain a powder, preparing a green body from the powder, applying heat treatment to the green body in a pyrolysis/thermolysis step, pressureless sintering the green body, optimally followed by HIPing for further densification.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 6, 2014
    Inventors: Charles Schenck WILEY, Robert F. SPEYER
  • Publication number: 20140024564
    Abstract: A method of producing a compacted article according to one embodiment may involve the steps of: Providing a copper/molybdenum disulfide composite powder including a substantially homogeneous dispersion of copper and molybdenum disulfide sub-particles that are fused together to form individual particles of the copper/molybdenum disulfide composite powder; and compressing the copper/molybdenum disulfide composite powder under sufficient pressure to cause the copper/molybdenum disulfide composite powder to behave as a nearly solid mass.
    Type: Application
    Filed: March 14, 2013
    Publication date: January 23, 2014
    Inventors: Yakov Epshteyn, Lawrence J. Corte, Carl V. Cox, Matthew C. Shaw, Alejandra Banda
  • Publication number: 20130271610
    Abstract: The invention relates to a polycrystalline IR transparent material produced by sintering chalcogenide powder, e.g., ZnS powder, using hot uniaxial pressing followed by hot isostatic pressing. The microstructure of the material described in this disclosure is much finer than that found in material produced using the state of the art process. By using a powder with a particle size fine enough to improve sintering behavior but coarse enough to prevent a lowering of the wurtzite-sphalerite transition temperature, a highly transparent material with improved strength is created without degrading the optical properties. A high degree of transparency is achieved during hot pressing by applying pressure after the part has reached a desired temperature. This allows some degree of plastic deformation and prevents rapid grain growth which can entrap porosity. The crystallographic twins created during this process further inhibit grain growth during hot isostatic pressing.
    Type: Application
    Filed: April 16, 2012
    Publication date: October 17, 2013
    Inventors: Keith Gregory ROZENBURG, Eric Hector URRUTI
  • Publication number: 20130256957
    Abstract: A translucent alumina has an alumina content of 99.98% by mass or more and a density of 3.97 g/cm3 or more, and in which the volume percentage of crystal textures having an aspect ratio of 1.5 or less and a long axis length of 10 ?m or less is 93% or more.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 3, 2013
    Applicant: Seiko Epson Corporation
    Inventors: Hideki ISHIGAMI, Hidefumi NAKAMURA, Junichi HAYASHI
  • Publication number: 20130234374
    Abstract: Disclosed herein is a spinel article. The article includes a spinel material, wherein the spinel material has a monomodal grain size distribution with average grain sizes of less than or equal to about 15 micrometers, and a biaxial flexural strength of greater than or equal to about 300 megapascals when measured by a ring-on-ring flexural test as per ASTM Standard C1499-08. Disclosed herein too is a method for manufacturing a spinel article, including calcining a spinel powder; milling the powder in a milling medium; granulating the powder; screening the powder to a mesh size of about 40 to about 200 mesh; pressing the powder to form an article; burning out organics from the article; sintering the article; and hot isostatically pressing the article.
    Type: Application
    Filed: June 26, 2012
    Publication date: September 12, 2013
    Inventors: Milivoj Konstantin Brun, Anteneh Kebbede, Sean Michael Sweeney, Timothy James Yosenick
  • Publication number: 20130217562
    Abstract: A colored translucent zirconia sintered body contains a transition metal element as a coloring agent, having a clear color tone and high transparency, and being excellent in both design properties and esthetic properties, and its production process. A colored translucent zirconia sintered body includes yttria in an amount of at least 6 mol % and at most 15 mol % and at least one member selected from the group consisting of iron, nickel, manganese, cobalt, chromium, copper and vanadium in an amount of at least 0.02 mol % and at most 0.5 mol % as calculated as oxides, and having a porosity of at most 1,000 ppm. The average crystal grain size is preferably at most 60 ?m.
    Type: Application
    Filed: November 4, 2011
    Publication date: August 22, 2013
    Inventors: Shoichi Yamauchi, Isao Yamashita, Koji Tsukuma
  • Publication number: 20130218281
    Abstract: A method of pressure forming a brown part from metal and/or ceramic particle feedstocks includes: introducing into a mold cavity or extruder a first feedstock and one or more additional feedstocks or a green or brown state insert made from a feedstock, wherein the different feedstocks correspond to the different portions of the part; pressurizing the mold cavity or extruder to produce a preform having a plurality of portions corresponding to the first and one or more additional feedstocks, and debinding the preform. Micro voids and interstitial paths from the interior of the preform part to the exterior allow the escape of decomposing or subliming backbone component substantially without creating macro voids due to internal pressure. The large brown preform may then be sintered and subsequently thermomechanically processed to produce a net wrought microstructure and properties that are substantially free the interstitial spaces.
    Type: Application
    Filed: April 30, 2010
    Publication date: August 22, 2013
    Applicant: ACCELLENT INC.
    Inventors: Mark W. Broadley, James Alan Sago, Hao Chen, Edward J. Schweitzer, John Eckert, Jeffrey M. Farina
  • Patent number: 8501081
    Abstract: Polycrystalline alumina and methods for manufacturing polycrystalline alumina exhibiting improved transmission in the infrared region. In one embodiment, polycrystalline alumina articles are formed by providing a powder of substantially alpha phase alumina having a grain size of up to about 1 ?m, dispersing the powder in a liquid to form a slurry comprising powdered solids and liquid, removing excess of the liquid from the slurry to form a body, heating the body to provide a densified body, hot isostatically pressing the densified body under conditions to provide an article having a density of at least about 99.9% of theoretical density, and optionally annealing the article, wherein one or more of the annealing or heating are performed in an inert, dry gas.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: August 6, 2013
    Assignee: Ceranova Corporation
    Inventors: Mark V. Parish, Marina R. Pascucci, William H. Rhodes
  • Patent number: 8496852
    Abstract: The invention relates to a phosphor in a polycrystalline ceramic structure and a light-emitting element provided with the same comprising a Light-Emitting Diode (LED) in which a composite structure of phosphor particles is embedded in a matrix, characterized in that the matrix is a ceramic composite structure comprising a polycrystalline ceramic alumina material, hereafter called luminescent ceramic matrix composite. This luminescent ceramic matrix composite can be made by the steps of converting a powder mixture of ceramic phosphor particles and alumina particles into a slurry, shaping the slurry into a compact, and applying a thermal treatment, optionally in combination with hot isostatic pressing into a polycrystalline phosphor-containing ceramic alumina composite structure.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: July 30, 2013
    Assignee: Philips Koninklijke N.V.
    Inventors: Jan De Graaf, Theo Arnold Kop
  • Publication number: 20130157836
    Abstract: A silicon nitride material is disclosed which has properties necessary for efficient operation of a corona discharge igniter system in an internal combustion gas engine allowing an increase in fuel efficiency of over 10%. The material is disclosed in a range of compositions, all of which exhibit high dielectric strengths, high mechanical strength, thermal shock resistance and fracture toughness, low dielectric constant and loss tangent and electrical resistivity, all of which significantly increase the efficiency of the igniter system over current state of the art alumina insulators. Moreover, the materials retain their dielectric strength and structural integrity at elevated temperatures, up to 800° C.-1000° C. One embodiment comprises a sintered silicon nitride process comprising powder batching, binder removal and sintering. In the preferred embodiment the method of manufacture for silicon nitride is an SRBSN process comprising powder batching, powder pressing, binder removal, nitriding and sintering.
    Type: Application
    Filed: December 16, 2011
    Publication date: June 20, 2013
    Inventor: Biljana Mikijelj
  • Patent number: 8425817
    Abstract: A mold assembly (100) for forming an object, the mold assembly comprising: a first mold portion (110) comprising an internal surface (112), an external surface (114) and an opening (116) leading from the internal surface to the external surface; and a second mold portion (120) positionable with respect to the opening (116) to cover the opening; wherein the first and second mold portions define an interior (130) for receiving a material to be molded into the object; and wherein the second mold portion comprises a surface (122) adapted to face the interior of the mold assembly and form a feature on the object.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 23, 2013
    Assignee: Rolls-Royce PLC
    Inventor: Michael N Wybrow
  • Publication number: 20130070904
    Abstract: A rotary anode for an X-ray tube includes a ceramic base body that carries a focal path for emitting X-rays during electron irradiation. The ceramic base body is made of a mixture of silicon carbide and at least one high temperature-resistant diboride.
    Type: Application
    Filed: September 20, 2012
    Publication date: March 21, 2013
    Inventors: Joerg Freudenberger, Stefan Lampenscherf, Gia Khanh Pham, Steffen Walter
  • Publication number: 20130048500
    Abstract: A method of forming a carbon and titanium containing composite that includes mixing a titanium-containing powder with carbon and forming the mixture of the titanium-containing-powder and carbon into a composite structure at a temperature of less than 1500° C. The forming process provides a net shape having dimensions within 90% or greater than the final shape of the product. The binder of the composite is provided by the titanium, and the dispersed phase of the composite is provided by the carbon. The carbon and titanium containing composite may be employed as in applications including capacitive deionization (CDI), gas separation, chromatography, catalysis and electrode.
    Type: Application
    Filed: August 26, 2011
    Publication date: February 28, 2013
    Applicant: UT-BATTELLE, LLC
    Inventors: Craig A. Blue, Sheng Dai, David W. DePaoli, James O. Kiggans, JR., Richard T. Mayes, William H. Peter, Constantinos Tsouris
  • Patent number: 8383236
    Abstract: Provided are a zirconia sintered body that has excellent mechanical characteristics, as well as semiconductivity that can allow static electricity to escape at an appropriate rate, and a manufacturing method that can manufacture the same at lower cost than in the past. The zirconia sintered body is made of 66-90 parts by weight of zirconia that contains a stabilizer, and a total of 10-34 parts by weight of iron, chromium and titanium oxides. Of the iron, chromium and titanium oxides, the proportion of iron oxide is 70-99.5 wt %, the proportion of chromium oxide is 0.4-20 wt % and the proportion of titanium oxide is 0.1-10 wt %. The combined proportion of tetragonal and cubic crystals in the zirconia crystal phase is 90% or more and the mean crystal grain size of the zirconia is 0.3-0.5 ?m. The mean crystal grain size of the iron, chromium and titanium oxides is 0.5-2.0 ?m. It has excellent mechanical characteristics, as well as semiconductivity.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: February 26, 2013
    Assignee: Kyocera Corporation
    Inventors: Shunji Mikaki, Kunihide Shikata
  • Publication number: 20130045359
    Abstract: A display window is formed by mechanically processing a transparent ceramic article. The composition of the ceramic article includes yttrium oxide and thorium oxide, the mole percentage of yttrium oxide is about 85% to about 94.99%, and the mole percentage of thorium oxide is about 4.99% to about 15%. The display window has a high light transmittance, good acid and alkali corrosion resistance, high hardness, long lifetime.
    Type: Application
    Filed: March 27, 2012
    Publication date: February 21, 2013
  • Patent number: 8377369
    Abstract: A method for pressureless sintering of B4C without sintering agents which reduces sintering time without sacrificing relative density, and avoids decomposition of B4C and loss of relative density.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: February 19, 2013
    Assignee: Georgia Tech Research Corporation
    Inventors: Robert F. Speyer, Zhihao Bao, Namtae Cho
  • Publication number: 20130037763
    Abstract: An object of the present invention is to provide a colored translucent zirconia sintered body having red color and high translucency. The present invention relates to a zirconia sintered body, characterized by containing 6 to 30 mo % of yttria and 0.1 to 5 mol % of cerium oxide in terms of CeO2, the cerium oxide containing an oxide of trivalent cerium. The zirconia sintered body of the present invention has, in addition of high hardness, diamond luster based on high refractive index inherent in zirconia, deep red color and transparency.
    Type: Application
    Filed: March 4, 2011
    Publication date: February 14, 2013
    Inventor: Koji Tsukuma
  • Publication number: 20130037524
    Abstract: An electrode applicable to discharge surface treatment is produced. This method is comprised of: kneading a composition including an electrically conductive mixed matter including a first powder obtained by at least any process selected from the group consisting of an atomizing method, a reduction method, and a carbonyl method and a second powder obtained by a crushing method, and a binder, the electrically conductive mixed matter including the second powder at a ratio of 10-65 weight %; injecting the kneaded composition into a mold to produce a green body; heating the green body so as to remove the binder from the green body; and sintering the green body excepting the binder.
    Type: Application
    Filed: April 27, 2011
    Publication date: February 14, 2013
    Applicant: IHI Corporation
    Inventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Hiroyuki Ochiai, Yukihiro Shimoda, Kyouhei Nomura, Keiji Kubushiro
  • Patent number: 8343402
    Abstract: In one embodiment method to form a composite part from a metallic composite powder, comprises positioning a metallic composite powder preform in a mold cavity formed by a first susceptor and a second susceptor, heating the mold cavity to a first processing temperature, applying a pressure to the mold cavity, and applying a thermal oscillation cycle to the mold cavity, wherein the thermal oscillation cycle oscillates the temperature of the mold cavity between a first temperature in which the metallic composite powder is in a first phase and a second temperature in which the metallic composite powder is in a second phase, different from the first phase.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 1, 2013
    Assignee: The Boeing Company
    Inventors: Marc R. Matsen, Wesley B. Crow, Brad L. Kirkwood
  • Patent number: 8343415
    Abstract: Processes for forming ceramic particulate material. The ceramic particulate material includes alumina particles, the particles having a specific surface area (SSA) not less than 15 m2/g and not greater than 75 m2/g and a sphericity quantified by at least one of (i) a mean roundness not less than 0.710 as measured by Roundness Correlation Image Analysis, and (ii) a concavity less than 20%, wherein concavity is the percent of alumina particles based on a sample of at least 100 particles, which have a concave outer peripheral portion that extends along a distance not less than 10% of d50 by TEM inspection, the concave outer peripheral portion having a negative radius of curvature as viewed from an interior of the particle.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: January 1, 2013
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Ralph Bauer, Andrew G. Haerle, Doruk O. Yener, Claire M. Theron, Michael D. Kavanaugh
  • Publication number: 20120321851
    Abstract: A wear resistant member formed of ceramic sintered body mainly composed of silicon nitride, the ceramic sintered body containing 10 to 3500 ppm of an Fe component in terms of Fe element, more than 1000 ppm to 2000 ppm of a Ca component in terms of Ca element, and 1 to 2000 ppm of a Mg component in terms of Mg element, wherein a ?-phase ratio of silicon nitride crystal grains is 95% or more, a maximum longer diameter of the silicon nitride crystal grains is 40 ?m or less, Ca component existing in grain boundary phase is not detected by XRD (X-ray Diffraction method), and each of dispersions in Vickers hardness, fracture toughness and density of the wear resistant member is within a range of ±10%. According to this structure, there can be obtained a wear resistant member comprising a ceramic sintered body improved in grinding-work property in addition to an excellent wear resistant property.
    Type: Application
    Filed: February 10, 2011
    Publication date: December 20, 2012
    Inventor: Minoru Takao
  • Publication number: 20120280184
    Abstract: The present invention relates to a composite material comprising a ceramic component, characterized in that it has a negative coefficient of thermal expansion, and carbon nanofilaments, to its obtainment process and to its uses as electrical conductor in microelectronics, precision optics, aeronautics and aerospace.
    Type: Application
    Filed: December 14, 2010
    Publication date: November 8, 2012
    Applicant: Consejo Superior De Investigaciones Cientificas (CSIC)
    Inventors: Ramon Torrecillas San Millan, Olga Garcia Moreno, Maria Amparo Borrell Tomás, Adolfo Fernández Valdes
  • Publication number: 20120255743
    Abstract: Earth-boring casing shoes include a crown configured for at least one of drilling and reaming a wellbore when the crown is attached to a section of casing and the casing is advanced into a wellbore. The crown includes a body comprising a corrodible composite material, and at least one cutting structure carried on the body. The casing shoes further include connection structure configured for attachment to a section of casing. Methods are used to form such casing shoes, and such casing shoes are used to install casing within wellbores.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 11, 2012
    Inventor: James Andy Oxford
  • Patent number: 8236200
    Abstract: A transparent, nano-composite material and methods for making structures from this material are provided. In one embodiment, the material is made from a polycrystalline matrix containing dispersed particles of a harder material. The particles are less then about 100 nm. In other embodiments, methods for making structures from the material are provided. In one aspect, the methods include blending precursor powders for the matrix and reinforcing phases prior to forming and sintering to make a final structure. In other aspects, a precursor powder for the matrix is pressed into a green shape, which is partially sintered and exposed to a solution containing a precursor for the reinforcing phase, prior to be sintered into the final material. In another aspect, the precursor powder for the matrix is coated with a sol-gel precursor for the reinforcing material, then pressed into a green shape and sintered to form the final structure.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: August 7, 2012
    Assignee: General Electric Company
    Inventors: Sean Michael Sweeney, Sergio Martins Loureiro, Timothy Yosenick
  • Publication number: 20120153547
    Abstract: Processes for forming ceramic particulate material. The ceramic particulate material includes alumina particles, the particles having a specific surface area (SSA) not less than 15 m2/g and not greater than 75 m2/g and a sphericity quantified by at least one of (i) a mean roundness not less than 0.710 as measured by Roundness Correlation Image Analysis, and (ii) a concavity less than 20%, wherein concavity is the percent of alumina particles based on a sample of at least 100 particles, which have a concave outer peripheral portion that extends along a distance not less than 10% of d50 by TEM inspection, the concave outer peripheral portion having a negative radius of curvature as viewed from an interior of the particle.
    Type: Application
    Filed: February 27, 2012
    Publication date: June 21, 2012
    Inventors: Ralph Bauer, Andrew G. Haerle, Doruk O. Yener, Claire M. Theron, Michael D. Kavanaugh
  • Patent number: 8197885
    Abstract: A method for producing a metal article according to one embodiment may include: Providing a supply of a sodium/molybdenum composite metal powder; compacting the sodium/molybdenum composite metal powder under sufficient pressure to form a preformed article; placing the preformed article in a sealed container; raising the temperature of the sealed container to a temperature that is lower than a sintering temperature of molybdenum; and subjecting the sealed container to an isostatic pressure for a time sufficient to increase the density of the article to at least about 90% of theoretical density.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: June 12, 2012
    Assignee: Climax Engineered Materials, LLC
    Inventors: Dave Honecker, Christopher Michaluk, Carl Cox, James Cole
  • Patent number: 8192648
    Abstract: A method of forming a material from a source material including the following steps of grinding the source material to get powders if the source material is not already in the form of powders; sintering the powders with at least one compression step and one thermal processing step; and purifying the material with a gas flow, the gas flow passing through the porosity channels of the material.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: June 5, 2012
    Assignee: S'Tile
    Inventor: Alain Straboni
  • Publication number: 20120123421
    Abstract: A cutting template or a cutting block, preferably to a cutting template or a cutting block for use in medical technology.
    Type: Application
    Filed: April 1, 2010
    Publication date: May 17, 2012
    Inventors: Roman Preuss, Heinrich Wecker, Matthias Eschle
  • Publication number: 20120100032
    Abstract: The invention relates to a mould assembly for a hot isostatic pressing, HIP, process, comprising: an insert comprising a plurality of pieces which combine to provide a recess in which a protrusion of the component can be formed; and, a holding piece having at least one cavity in which the insert is mateably received.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 26, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: Wayne E. VOICE, Junfa MEI, Thomas P. JARVIS
  • Publication number: 20120100033
    Abstract: This invention relates to a mould assembly for a hot isostatic pressing, HIP, process for fabricating a component, comprising: a first part which includes a shaped surface for forming a first surface of the component, the shaped surface having at least one recess; a second part arranged to move relative to the first part during the HIP process so as to compress a powder in-fill held therebetween, wherein the second part includes a formation configured to focus pressure toward the recess so as to aid consolidation of the powder in-fill at a distal end thereof.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 26, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: Wayne E. VOICE, Thomas P. JARVIS
  • Publication number: 20120094823
    Abstract: The subject of the present invention relates to obtaining a zirconia sintered body having excellent in both properties of a translucency and a mechanical strength. The present invention relates to obtaining a high-strength zirconia sintered body having a translucency of an in-line transmission of 50% or more at a sample thickness of 1 mm for visible light at a wavelength of 600 nm and an average flexural strength of 300 MPa or more by subjecting a zirconia primary sintered body having an average grain size of 1 ?m or less and a relative density of 92% or more and the crystal phase composed of cubic crystals only to HIP treatment at a temperature of 1,250° C. to 1,600° C. and a pressure of at least 50 MPa. The primary sintered body is obtained by maintaining a molded body of a zirconia powder containing 7 mol % to 30 mol % of yttria at 1,100° C. to 1,300° C. for at least 5 hrs or by heating the molded body at a high rate of temperature rise of 500° C./hr or more.
    Type: Application
    Filed: July 15, 2010
    Publication date: April 19, 2012
    Inventors: Masahiro Watanabe, Satoshi Kondoh, Koji Tsukuma
  • Patent number: 8147736
    Abstract: A molding apparatus for making a cutting tool includes a cylindrically shaped elastic bag having an internal cavity for receiving a granulated material, such as a mixture of cobalt and carbide. The profile of the interior cavity substantially corresponds to the shape of the cutting tool being produced. The ends of the bag are open to provide access to the interior cavity of the bag. A substantially rigid tubular-shaped pressure sleeve encloses an outer circumference of the elastic bag. A pair of end caps operate to seal the open ends of the elastic bag and are engageable with the ends of the pressure sleeve. The granulated material can be formed into a solid coherent structure by placing the assembled mold containing the granulated material into a hydrostatic press for applying a substantially uniform compressive load to the outer periphery of the elastic bag.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: April 3, 2012
    Inventors: John C. Hayden, Matthew W. Hayden
  • Patent number: 8133429
    Abstract: In a method of forming a chalcogenide compound target, a first powder including germanium carbide or germanium is prepared, and a second powder including antimony carbide or antimony is prepared. A third powder including tellurium carbide or tellurium is prepared. A powder mixture is formed by mixing the first to the third powders. After a shaped is formed body by molding the powder mixture. The chalcogenide compound target is obtained by sintering the powder mixture. The chalcogenide compound target may include a chalcogenide compound that contains carbon and metal, or carbon, metal and nitrogen considering contents of carbon, metal and nitrogen, so that a phase-change material layer formed using the chalcogenide compound target may stable phase transition, enhanced crystallized temperature and increased resistance. A phase-change memory device including the phase-change material layer may have reduced set resistance and driving current while improving durability and sensing margin.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: March 13, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Ho Ha, Bong-Jin Kuh, Han-Bong Ko, Doo-Hwan Park, Sang-Wook Lim, Hee-Ju Shin