Includes Adding A Binder Material Patents (Class 419/65)
-
Patent number: 5021208Abstract: A method for removing a paraffin wax based binder containing a fatty acid from a green article, wherein the article is made of material selected from the group consisting of ceramic powders and metallic powders, which comprises heating the article in a non-oxidizing atmosphere in a furnace by raising the temperature at a rate of about 0.5.degree. C. to 1.0.degree. C. per minute to a first temperature of about 50.degree. C. to 80.degree. C. and thereafter maintaining the first temperature for about 30 to 90 minutes to essentially completely melt the binder, raising the temperature from the first temperature at a rate of about 0.5.degree. C. to 1.0.degree. C. per minute to a second temperature of about 200.degree. C. to 225.degree. C. and thereafter maintaining the second temperature for about 30 to 90 minutes to essentially completely vaporize the paraffin wax, raising the temperature from the second temperature at a rate of about 0.5.degree. C. to 1.0.degree. C. per minute to a third temperature of about 260.Type: GrantFiled: May 14, 1990Date of Patent: June 4, 1991Assignee: GTE Products CorporationInventors: David C. Ludwig, Joseph J. Penkunas
-
Patent number: 5006493Abstract: A composition comprising a ceramic material and, as a binder, poly(ethyloxazoline).Type: GrantFiled: March 31, 1986Date of Patent: April 9, 1991Assignee: The Dow Chemical CompanyInventor: James E. Schuetz
-
Patent number: 5004580Abstract: A method and apparatus for packing a permanent magnet powder wherein a solenoid coil is provided near the opening of a cylindrical molding space of a mold in such a manner that the direction of the central axis of the solenoid coil substantially coincides with the central axis of the molding space, and an alternating current magnetic field is applied, so that a permanent magnet powder above the opening is packed into the molding space. A magnetic pole may be provided in the center of the solenoid coil. The method of the present invention can be applied to not only a powder for a sintered magnet but also a powder for a bonded magnet.Type: GrantFiled: April 13, 1990Date of Patent: April 2, 1991Assignee: Fuji Electrochemical Co. Ltd.Inventors: Yoshio Matsuo, Hirofumi Nakano, Masakuni Kamiya, Kezuo Matsui
-
Patent number: 4997699Abstract: A dental material of a metal composition for reinforcing the metal framework of a dental restoration comprising an aggregate combination of metal particles including a first high fusing temperature precious metal component and a second low fusing temperature component which form a porous sponge-like structure upon heat treatment.Type: GrantFiled: May 12, 1989Date of Patent: March 5, 1991Inventors: Itzhak Shoher, Aharon E. Whiteman
-
Patent number: 4990394Abstract: The method and material of the present inventioin includes a combination of a high-fusing temperature metal component and a low-fusing temperature metal component which are adapted to be heat treated at a temperature above the melting temperature of the low-fusing temperature metal component, such that a porous, sponge-like structure is formed with a total void volume of 20-80%.Type: GrantFiled: May 8, 1989Date of Patent: February 5, 1991Inventors: Itzhak Shoher, Aharon E. Whiteman
-
Patent number: 4965039Abstract: A method of making an inorganic slurry, forming the inorganic slurry into a useful article and method of removing the solvent medium from the formed article. The slurry contains an inorganic powder, water, dispersant, thermally gelable polymeric binder and optionally a plasticizer. The method comprises admixing the inorganic powder, water and dispersant to form a blend. The blend is a ball milled, heated, and admixed with a thermally gelable polymeric binder to form a slurry mixture, then the mixture is cooled. The slurry mixture can be extruded to form useful articles, such as metal or ceramic tapes. Additionally, the invention is also a method of final shaping and removing solvents from the formed article. A heated calendar roll stack assembly is used to rapidly remove the solvent from the article. When sintered, the resulting article is very dense and exhibits substantially no voids.Type: GrantFiled: September 2, 1988Date of Patent: October 23, 1990Assignee: The Dow Chemical CompanyInventor: James E. Schuetz
-
Patent number: 4933025Abstract: A method for treating rare earth permanent magnetic material is disclosed. The treatment includes soaking ribbon rare earth permanent magnetic material consisting essentially of grains of the tetragonal crystal phase RE.sub.2 TM.sub.14 B where RE is neodymium and/or praseodymium or mixtures thereof with other rare earth elements and TM is iron or mixtures of iron and cobalt, cobalt in a soaking solution of either distilled water or phosphoric acid and manganese phosphate solution, draining off the soaking solution, rinsing with distilled water while agitating to separate and remove fine powdered magnetic material, and washing and drying the remaining powder or ribbons. The treated material is taken to substantial dryness before the material is incorporated into a permanent magnet.Type: GrantFiled: October 2, 1989Date of Patent: June 12, 1990Assignee: General Motors CorporationInventors: Erwin A. Alson, Thomas H. VanSteenkiste
-
Patent number: 4913737Abstract: Metallic sintered parts with hollow structure and high density and toughness can be produced easily be kneading a raw metallic powder with an aqueous solution of an organic binder, extruding the resulting kneaded mixture, removing the organic binder from the extruded product and sintering the binder removed extruded product.Type: GrantFiled: June 3, 1988Date of Patent: April 3, 1990Assignee: Hitachi Metals, Ltd.Inventors: Hideki Nakamura, Takayuki Fukaya
-
Patent number: 4906424Abstract: Greenbodies are produced by a RIM injection molding process wherein a homogeneous mixture of finely divided ceramic or metallic material and a polymerizable monomeric binder is injected into a mold and held at an elevated temperature for a sufficient time to polymerize the binder and form the greenbody. A preferred monomeric binder includes di- and tri-acrylate or -methacrylate esters of polyols. The low viscosity of the monomeric binder allows a loading of ceramic material of greater than 50 vol. % without adversely affecting the ability to injection mold the mixture.Type: GrantFiled: February 16, 1988Date of Patent: March 6, 1990Assignee: Hoechst Celanese Corp.Inventors: O. Richard Hughes, John R. Costanza
-
Patent number: 4902471Abstract: A method is disclosed for producing metal carbide grade powders, which comprises forming a wax mixture consisting essentially of in percent by weight about 10 to 60 of an organic compound additive which is a solid at room temperature and contains a C.dbd.Type: GrantFiled: September 11, 1989Date of Patent: February 20, 1990Assignee: GTE Products CorporationInventors: Joseph J. Penkunas, Theodore E. Smith, Jr.
-
Patent number: 4830994Abstract: Greenware having improved green strength is prepared using poly(ethyloxazoline) as a binder.Type: GrantFiled: December 18, 1987Date of Patent: May 16, 1989Assignee: The Dow Chemical CompanyInventor: James E. Schuetz
-
Patent number: 4795598Abstract: A method of binder removal from a green body before sintering or the like wherein the binder is constituted of a polymeric material or mixture which is degradable by thermo-oxidation and the green body is initially heated to a temperature where the binder reaches an energy level above the activation energy of the binder, as a result of which exothermic degradation reactions are initiated at the binder-atmosphere interface. The rate of the exothermic reaction is controlled by the rate of supply of thermal energy and oxygen to the reaction site as well as the rate of evacuation of the heat of reaction generated during the thermal oxidation. Substantially all of the binder is thus removed from the green body which can then be sintered in accordance with the practices of the prior art.Type: GrantFiled: January 13, 1987Date of Patent: January 3, 1989Assignee: Solid Micron Materials, Pte, Ltd.Inventor: Romain L. Billiet
-
Patent number: 4775598Abstract: A process is described in which hollow spheres or hollow-sphere composites (moldings) having high-strength walls are produced. Additional layers are applied to metallized spherical lightweight particles having a core of foamed polymer. In order to increase the strength of the wall of the spherical particle and the strength of the molding, metallized lightweight spherical particles having a metal wall thickness of 5 to 20 microns are treated (coated) with a dispersion of particulate metal or metal oxide or particulate ceramic or refractory material, the lightweight spherical particles coated in a thickness from 15 to 500 microns are dried, the dried particles are heated to a temperature of about 400.degree. C. to effect a pyrolysis of the polymer core, and the particles are subsequently sintered at a temperature from 900.degree. to 1400.degree. C.Type: GrantFiled: November 25, 1987Date of Patent: October 4, 1988Assignee: Norddeutsche Affinerie AkitiengesellschaftInventor: Manfred Jaeckel
-
Patent number: 4772322Abstract: A process for producing flat products from particulate material comprises the steps of forming relatively smooth, castable slurry comprising a suspension of particulate material in an aqueous solution, a film-forming binder material and a dispersion of a particulate synthetic resin in an aqueous solution, depositing a coating of this slurry onto a support surface and, heating the deposited coating to a temperature at which a component of the synthetic resin volatilises. The coating may be removed from the support surface as a flat product either before or after heating to volatilize a component of the synthetic resin.Type: GrantFiled: May 20, 1987Date of Patent: September 20, 1988Inventors: John Bellis, Nigel J. Brooks
-
Patent number: 4710223Abstract: A sintered, metal infiltrated article and a method for preparing same is disclosed. The method permits mass production by injection molding, of metal infiltrated sintered articles of complex shape without excessive machining of the final product. The articles so produced have desirable physical properties such as abrasion resistance, high hardness, and high resistance to erosion at extreme temperatures encountered in use.Type: GrantFiled: March 21, 1986Date of Patent: December 1, 1987Assignee: Rockwell International CorporationInventor: Daniel E. Matejczyk
-
Patent number: 4670215Abstract: There is disclosed a process for forming a wear-resistant, sintered layer on a metallic substrate. The process comprises steps of adhesively attaching to a surface of metallic substrate an alloy particle sheet containing 94 to 99 weight % of ternary eutectic alloy particles and 6 to 1 weight % of acryl binder, heating in a non-oxidating atmosphere to a temperature of 150.degree. to 380.degree. C. and holding at the temperature for at least 5 minutes, and heating a sintering temperature of the alloy particles.Type: GrantFiled: February 19, 1985Date of Patent: June 2, 1987Inventors: Tsuyoshi Morishita, Sigemi Osaki, Noriyuki Sakai, Yukio Shimizu, Toshiharu Konishi, Takahumi Sakuramoto
-
Patent number: 4661315Abstract: The disclosure relates to a method of rapidly removing binder from a "green" body composed of metal or cermet fine particles and a carbon-containing binder wherein the debinderizing step is performed in a water saturated atmosphere to provide chemical reaction with elemental carbon, the reaction products being removed from the system.Type: GrantFiled: February 14, 1986Date of Patent: April 28, 1987Assignee: Fine Particle Technology Corp.Inventor: Raymond E. Wiech, Jr.
-
Patent number: 4659404Abstract: A composite is provided which is adaptable to be a substrate for an electronic application. The composite comprises first material particles having a coefficient of thermal expansion in the range of about -20.times.10.sup.-7 to about 50.times.10.sup.-7 in/in/.degree. C. Second material particles having a coefficient of thermal expansion in the range of about 100.times.10.sup.-7 to about 200.times.10.sup.-7 in/in/.degree. C. are mixed with the first material particles. A bonding agent adheres the first and second material particles into a coherent composite having a coefficient of thermal expansion in the range of about 1.times.10.sup.-7 to about 50.times.10.sup.-7 in/in/.degree. C.Type: GrantFiled: June 24, 1985Date of Patent: April 21, 1987Assignee: Olin CorporationInventor: Sheldon H. Butt
-
Patent number: 4626406Abstract: A method for consolidating powder utilizing slurry extrusion or rolling techniques. A metallic powder, binder and boron containing activator are mixed together to form a slurry. The slurry is introduced into an active forming apparatus whereupon it is formed into an object of predetermined shape and sintered.Type: GrantFiled: October 28, 1985Date of Patent: December 2, 1986Assignee: Inco Alloys International, Inc.Inventor: Jon M. Poole
-
Patent number: 4617054Abstract: A process for producing strip from particulate metallic material in which a slurry comprising a suspension of particulate metallic material in a solution of water containing a film forming binder material is deposited as a coating onto a support surface and is heated to gel the binder and to dry the slurry coating, the dried strip subsequently being removed from the support surface and rolled to effect compaction thereof. The ratio of particulate metallic material to water content of the slurry lies within the range 3.4:1 and 4.2:1 to ensure good flowability of the slurry coating and to produce the required flat profile in the rolled strip.Type: GrantFiled: August 7, 1985Date of Patent: October 14, 1986Assignee: Mixalloy LimitedInventor: Roy Mathers
-
Patent number: 4613370Abstract: A hollow charge, or plate charge, lining, and a projectile charge coating, made from a composite material of tungsten and copper. Indicated are material proportions, grain sizes, and manufacturing methods.Type: GrantFiled: October 3, 1984Date of Patent: September 23, 1986Assignees: Messerschmitt-Bolkow Blohm GmbH, Bayerische Metallwerke GmbHInventors: Manfred Held, Alfred Leidig, Wilhelm A. Merl, Gunter Stempel
-
Patent number: 4608317Abstract: A method for manufacturing a metal sintered body disclosed herein is characterized by the use of steps of: mixing 70 to 90 weight % of self-fluxing alloy powder and 10 to 30 weight % of metal powder of high melting point having a higher melting point than that of the self-soluble metal powder and in which the self-fluxing alloy powder is liable to be deposited thereon to obtain a metal powder having a sintering property; using a material in which 1 to 10 weight % of plastic binder is kneaded with the metal powder having a sintering property to obtain a molded body having a predetermined shape; and sintering the molded body at a temperature in excess of a liquid phase line of the self-fluxing alloy powder.Type: GrantFiled: April 15, 1985Date of Patent: August 26, 1986Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Osamu Kobayashi, Hiroshi Sasaki, Toshiki Kaneko, Hideaki Ikeda, Yoshihisa Yamamura
-
Patent number: 4604259Abstract: A copper-rich metal shape is produced by forming a coherent forerunner shape consisting essentially of cupreous powder, said powder containing a proportion of copper oxide sufficient for facilitating the obtaining of a high sinter density in sintered porous mass, and in a reducing atmosphere at temperature that will sinter copper present, converting said forerunner shape into a porous sintered mass virtually devoid of copper oxide. Said porous mass can be worked so virtually full density if desired.Type: GrantFiled: September 19, 1985Date of Patent: August 5, 1986Assignee: SCM CorporationInventor: Charles I. Whitman
-
Patent number: 4602953Abstract: The disclosure relates to a feedstock of particulate material for use in formation of articles therefrom, the feedstock including a homogeneous combination of large particles, small particles and a binder. The large particles comprise less than about 60% by volume of the feedstock and are defined as particles having a diameter greater than their diffusion length. The fine particles and binder combined comprise more than about 40% by volume of the feedstock, the fine particles being defined as particles having a diameter less than their diffusion length.Type: GrantFiled: March 13, 1985Date of Patent: July 29, 1986Assignee: Fine Particle Technology Corp.Inventor: Raymond E. Wiech, Jr.
-
Patent number: 4597790Abstract: In a method of producing unbaked agglomerates, green pellets or briquettes are produced by adding 5 to 30% of reduced iron powder, mill scale powder or iron sand and also adding a binder consisting of a cement or granulated blast furnace slag and then the green pellets or briquettes are dry cured thereby producing agglomerates having excellent reducing performance.Type: GrantFiled: May 21, 1985Date of Patent: July 1, 1986Assignee: Nippon Kokan Kabushiki KaishaInventors: Seiji Matsui, Kazuharu Yatsunami, Tsuneo Miyashita, Noboru Sakamoto
-
Patent number: 4596692Abstract: A process for forming a wear-resistant, sintered layer on an iron based substrate which comprises steps of providing a first alloy sheet containing 94 to 99 weight % of Fe-Cr type alloy particles and 6 to 1 weight % of acryl binder and a second alloy sheet containing 94 to 99 weight % of eutectic alloy particles and 6 to 1 weight % of acryl binder, placing the first and second alloy sheets in a superposed condition on the substrate, and heating in a non-oxidating atmosphere to a temperature which is higher than a solidus temperature of the eutectic alloy but lower than a solidus temperature of the Fe-Cr type alloy.Type: GrantFiled: February 19, 1985Date of Patent: June 24, 1986Inventors: Tsuyoshi Morishita, Sigemi Osaki, Yasuhumi Kawado, Yukio Shimizu, Toshiharu Konishi, Takahumi Sakuramoto
-
Patent number: 4569821Abstract: A porous metal body, e.g. an electrode for an electric cell, is prepared using the following steps:preparing a foam by adding a surface active agent and a gelling agent to water and then foaming the mixture by stirring and/or blowing air through it;incorporating metal powder in the foam in order to obtain a suspension of the metal therein;shaping the foam with its suspension of metal, and adding a stabilizing agent thereto, said stabilizing agent being one which polymerizes on contact with water, thereby causing the shaped foam to set in shape; andheating the set foam to pyrolize the organic material therein and to sinter the metal.This method produces a more even and a more reliable pore size than has previously been possible.Type: GrantFiled: February 18, 1983Date of Patent: February 11, 1986Assignee: Compagnie Generale d'Electricite, S.A.Inventors: Gerard Duperray, Michel Hilaire
-
Patent number: 4554130Abstract: A method of consolidating metallic body means comprises(a) applying to the body means a mixture of:(i) metallic powder(ii) fugitive organic binder(iii) volatile solvent(b) drying the mixture, and(c) burning out the binder and solvent at elevated temperature,(d) and applying pressure to the powdered metal to consolidate same on said body means.Type: GrantFiled: October 1, 1984Date of Patent: November 19, 1985Assignee: CDP, Ltd.Inventor: Gunes M. Ecer
-
Patent number: 4534936Abstract: A method for removal of organic binders from powder compacts is disclosed in which the compact is heated while the weight change is monitored and controlled. The heating is regulated so that the removal rate of the binder is optimized. The removal time can be shortened without creating defects in the powder compact.Type: GrantFiled: June 9, 1983Date of Patent: August 13, 1985Inventors: Elis Carlstrom, Agneta I. Johnsson, Leif A. G. Hermansson
-
Patent number: 4508567Abstract: A flux-path forming member of a motor is prepared from a mixture mass by evenly mixing up to 4% of a thermosetting resin binder and molybdenum disulfide with at least 96% of a metal powder, fibrous metal, or a combination thereof; a second step of compacting in a mold under pressure the mixture mass into a desired shape; and a third step of heating, concurrently with or subsequently to the second step, the mixture mass to an elevated temperature to cure the binder portion thereof. The compact prepared by the above process is also disclosed. The content of the thermosetting resin at least 0.2 percent by weight, and the content of the molybdenum disulfide is at least 0.1 percent by weight. The curing operation is conducted at a temperature not higher than 300.degree. C.Type: GrantFiled: June 24, 1982Date of Patent: April 2, 1985Assignee: Brother Kogyo Kabushiki KaishaInventors: Shigeru Mizuno, Masahiko Suzuki, Haruki Mizuno, Masutaro Katsu
-
Patent number: 4497873Abstract: An isentropic compressive wave generator and method of making same. The w generator comprises a disk or flat "pillow" member having component materials of different shock impedances formed in a configuration resulting in a smooth shock impedance gradient over the thickness thereof for interpositioning between an impactor member and a target specimen for producing a shock wave of a smooth predictable rise time. The method of making the pillow member comprises the reduction of the component materials to a powder form and forming the pillow member by sedimentation and compressive techniques.Type: GrantFiled: January 6, 1983Date of Patent: February 5, 1985Assignee: The United States of America as represented by the Department of EnergyInventor: Lynn M. Barker