With Nonmetal Constituent - Silicon(si) Considered A Metal (e.g., Cermet, Etc.) Patents (Class 75/230)
  • Patent number: 5889220
    Abstract: Copper-tungsten alloys used for materials of electrode, electric contacts, package materials for semiconductors, heat sink and their manufacturing methods. The copper-tungsten alloy contains preferably 5 to 30 wt. % of copper, 0.002 to 0.04 wt. % of phosphor, the remaining portion being substantially all tungsten, and it is preferable to contain in these alloys 0.1 to 0.5% of cobalt, nickel or iron or else any combined two out of these three.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: March 30, 1999
    Assignee: Toho Kinzoku Co, Ltd
    Inventors: Naoyoshi Akiyoshi, Kimio Nakada, Katsumi Koda, Hiroyuki Yamabe, Masao Nakayama
  • Patent number: 5883314
    Abstract: Abradable coatings for turbine engine shrouds are formed from biscuits formed of silicon-diffused powdered alloy compositions which are processed with an HF precursor to strip oxides from the coating during processing, the alloy blends comprising MCrAl(Y).sub.n alloys in which n is 0, 1 or more.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: March 16, 1999
    Inventors: George K. Sievers, Eugene V. Clark
  • Patent number: 5874684
    Abstract: A method and system for synthesizing nanocrystalline material. A system includes a chamber, a nonconsumable cathode shielded against chemical reaction by a working gas not including an oxidizing gas, but including an inert gas, a consumable anode vaporizable by an arc formed between the cathode and the anode, and a nozzle for injecting at least one of a quench and reaction gas in the boundaries of the arc.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: February 23, 1999
    Assignee: Nanophase Technologies Corporation
    Inventors: John C. Parker, Mohammed N. Ali, Byron B. Lympany
  • Patent number: 5858525
    Abstract: A synthetic gasket material for use in a high-pressure press includes a major proportion of clay mineral powder having sufficient lubricity to flow in a high-pressure press, a minor proportion of at least one hard material powder having a sufficiently greater hardness than the clay mineral to retard flow of the clay mineral and form a seal during pressing in a high-pressure press, and a sufficient amount of binder to form an integral body. The synthetic gasket material is formed by thoroughly mixing together in desired proportions the clay mineral, hard material, and binder. The mixture is compacted into a body near net geometry and having a desired configuration to facilitate use in the high-pressure press. The compacted body is heated for a sufficient time and at a sufficient temperature to remove non-crystallographic water.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: January 12, 1999
    Assignee: General Electric Company
    Inventors: Lan Carter, Xian Yao, Ghanshyam Rai
  • Patent number: 5850591
    Abstract: A method of manufacturing a porous metal sheet having pores forming a pattern, comprising the steps of supplying metal powders to a peripheral surface, of at least one pattern roller of a pair of rollers, on which a pattern including a large number of concaves is formed; dropping metal powders to the concaves and accumulating metal powders on the peripheral surface of the pattern roller except the concaves; and rolling directly the metal powders accumulated on the peripheral surface of the pattern roller by rotating a pair of the rollers. It is preferable to laminate porous metal sheets or solid metal sheets manufactured by a method other than the above-described method on the metal sheet manufactured by the above-described method.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: December 15, 1998
    Assignee: Katayama Special Industries, Ltd.
    Inventor: Hirofumi Sugikawa
  • Patent number: 5846270
    Abstract: A magnetic-abrasive powder includes a magnetic component of a powder of a magnetic material, an abrasive component of a powder of an abrasive material, and an adhesive which adhesively connects particles of the magnetic material with particles of the abrasive material.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: December 8, 1998
    Inventors: Savva Feygin, Gennady Kremen, Leonid Igelstyn
  • Patent number: 5796018
    Abstract: Ferrous powder particles are coated with vaporized phosphorus in a fluid-bed reactor to obtain homogeneous coatings of phosphorus. The coated powders are useful feed for pressed structural parts, exhibiting improved green density, compressibility and sintered density thus improving magnetic and tensile properties.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: August 18, 1998
    Assignees: Procedyne Corp., Magna-Tech P/M Labs.
    Inventors: Kenneth H. Moyer, David J. Geveke, Thomas R. Parr, Robert B. Roaper
  • Patent number: 5744254
    Abstract: Composite materials are disclosed comprising a continuous matrix with composite reinforcements therein. The composite materials may include a continuous metal, metal alloy or intermetallic matrix with intermetallic matrix composite reinforcements dispersed therein. Suitable metals for the continuous matrix include Al, Ti, Cu and Fe, and alloys and intermetallics thereof. The composite reinforcements comprise ceramic particles dispersed in a continuous intermetallic matrix. Suitable intermetallics include alumnides of Ti, Cu, Ni, Mg and Fe, while suitable ceramics include refractory metal borides, carbides, nitrides, silicides and sulfides. In one embodiment, the ceramic particles are formed in-situ within the intermetallic matrix of the composite reinforcements. The composite materials are produced by powder metallurgical techniques wherein powders of the continuous matrix component and powders of the composite reinforcement are blended and consolidated.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: April 28, 1998
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Stephen L. Kampe, Leontios Christodoulou
  • Patent number: 5736657
    Abstract: A sputtering target contains a target material including as constituent elements Ag, In, Te and Sb with the respective atomic percents (atom. %) of .alpha., .beta., .gamma. and .delta. thereof being in the relationship of 0.5.ltoreq..alpha.<8, 5.ltoreq..beta..ltoreq.23, 17.ltoreq..gamma..ltoreq.38, 32.ltoreq..delta..ltoreq.73, .alpha..ltoreq..beta., and .alpha.+.beta.+.gamma.+.delta.=100, and a method of producing the above sputtering target is provided. An optical recording medium includes a recording layer containing a phase-change recording material which includes as constituent elements Ag, In, Te and Sb with the respective atomic percents of .alpha., .beta., .gamma. and .delta. thereof being in the relationship of 1.ltoreq..alpha.<6, 7.ltoreq..beta..ltoreq.20, 20.ltoreq..gamma..ltoreq.35, 35.ltoreq..delta..ltoreq.70, and .alpha.+.beta.+.gamma.+.delta.=100, and is capable of recording and erasing information by utilizing the phase change of the recording material in the recording layer.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: April 7, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukio Ide, Hiroko Iwasaki, Yoshiyuki Kageyama, Yujiro Kaneko, Katsuyuki Yamada, Michiaki Shinotsuka, Makoto Harigaya, Hiroshi Deguchi
  • Patent number: 5730931
    Abstract: A heat-resistant platinum material with more than 99.5% by weight platinum, with high long-term creep resistance and low grain growth at high temperature contains 0.1 to 0.35% by weight zirconium and/or zirconium oxide and 0.002 to 0.02% by weight boron and/or boron oxide.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: March 24, 1998
    Assignee: Degussa Aktiengesellschaft
    Inventors: Manfred Poniatowski, Ernst Drost, Stefan Zeuner
  • Patent number: 5728238
    Abstract: An iron-based powder for producing impact-resistant components by powder compacting and sintering contains, in addition to Fe, 0.3-0.7% by weight of P, 0.3-3.5% by weight of Mo, and not more than 2% by weight of other alloying elements. A method of powder-metallurgically producing impact-resistant steel components comprises using an iron-based powder which, in addition to Fe, contains 0.3-0.7% by weight of P, preferably 0.35-0.65% by weight of P, 0.3-3.5% by weight of Mo, preferably 0.5-2.5% by weight of Mo, and not more than 2% by weight, preferably not more than 1% by weight, of other alloying elements; compacting the powder into the desired shape; and sintering the compact.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: March 17, 1998
    Assignee: Hoganas AB
    Inventors: Per Engdahl, Caroline Lindberg
  • Patent number: 5712435
    Abstract: Cores that are relatively unreactive with titanium and titanium alloys during casting are prepared from yttria slurries, which may contain other refractory materials, an acid and an inert organic solvent.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: January 27, 1998
    Assignee: Remet Corporation
    Inventor: Roy C. Feagin
  • Patent number: 5710382
    Abstract: Aluminum nitride powder, aluminum nitride platelets, powdered solid solutions of aluminum nitride and at least one other ceramic material such as silicon carbide, and composites of aluminum nitride and transition metal borides or carbides are prepared by combustion synthesis at low gaseous nitrogen pressures. Porous bodies of aluminum nitride or composites of aluminum nitride and transition metal borides or carbides are also prepared by combustion synthesis at these pressures. The porous bodies are suitable for infiltration, either as formed or after being coated with at least one layer of a silicate material, by polymers or metals. The powders are also suitable for preparing dense sintered bodies. The aluminum nitride powder is also used to prepare AlN sintered bodies.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: January 20, 1998
    Assignee: The Dow Chemical Company
    Inventors: Stephen D. Dunmead, William G. Moore, Kevin E. Howard, Kevin C. Morse, Theresa A. Guiton
  • Patent number: 5705695
    Abstract: The quaternary Zintl material (Et.sub.4 N).sub.4 ?Au(Ag.sub.1-x Au.sub.x).sub.2 Sn.sub.2 Te.sub.9 ! that contains 1-D semiconducting chains composed of four metallic elements is prepared by treating ethylenediamine extracts of a pentanary K--Au--Ag--Sn--Te alloy with Et.sub.4 NI.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: January 6, 1998
    Assignee: NEC Research Institute, Inc.
    Inventors: Robert C. Haushalter, Sandeep S. Dhingra
  • Patent number: 5698800
    Abstract: The present invention provides a mixed raw material which is capable of producing a porous metal sintered product having high porosity and fine and uniform pores. The mixed raw material for producing a porous metal sintered product is a composition including 0.05 to 10% of water-insoluble hydrocarbon organic solvent having 5 to 8 carbon atoms, 0.05 to 5% of surfactant, 0.5 to 20% of water-soluble resin binder, 5 to 80% of metallic powder having an average particle size of 0.5 to 500 .mu.m, optionally 0.1 to 40% of combustible agent for accelerating pore formation, and optionally, 0.1 to 15% of plasticizer consisting of at least one of polyhydric alcohols, oils and fats, ethers and esters, with a balance of water.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: December 16, 1997
    Assignee: Mitsubishi Materials Corporation
    Inventors: Koji Hoshino, Toru Kohno
  • Patent number: 5688450
    Abstract: A packaged electronic structure includes an electronic device, and a package to which the electronic device is affixed. At least a portion of the package is made of a composite material of aluminum nitride dispersed in aluminum. The composite material is preferably prepared by mixing powders of the aluminum nitride and aluminum, and thereafter pressing and sintering the mixture.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: November 18, 1997
    Assignee: Hughes Aircraft Company
    Inventors: M. Akbar Ali, Carl W. Peterson, Hutan Taghavi, Bruce W. Buller
  • Patent number: 5656787
    Abstract: A process of forming a sintered article for powder metal comprising blending carbon and ferro alloys and lubricant with compressible elemental iron powder, pressing said blended mixture to form sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a high density from a single compression.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: August 12, 1997
    Assignee: Stackpole Limited
    Inventors: Rohith Shivanath, Peter Jones, Danny Thien Duc Thieu
  • Patent number: 5649278
    Abstract: Aluminum nitride powder, aluminum nitride platelets, powdered solid solutions of aluminum nitride and at least one other ceramic material such as silicon carbide, and composites of aluminum nitride and transition metal borides or carbides are prepared by combustion synthesis at low gaseous nitrogen pressures. Porous bodies of aluminum nitride or composites of aluminum nitride and transition metal borides or carbides are also prepared by combustion synthesis at these pressures. The porous bodies are suitable for infiltration, either as formed or after being coated with at least one layer of a silicate material, by polymers or metals.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: July 15, 1997
    Assignee: The Dow Chemical Company
    Inventors: Stephen D. Dunmead, William G. Moore, Kevin E. Howard, Kevin C. Morse
  • Patent number: 5641921
    Abstract: This invention is directed toward a material which is used to coat or create a surface for machine cutting tools, all types of drill bit teeth, saw teeth, bearing surfaces valve seats, nozzles and the like, thereby producing surfaces which are highly abrasion and erosion resistant. Furthermore, this invention includes some of the possible methods for producing such a material given that the methods and apparatus required provide a significant cost reduction over those required for producing prior art surface materials with similar abrasion and erosion resistant properties. More specifically, the material set forth can be formed at relatively low temperatures and relatively low pressures by sintering mixtures for a relatively short period of time.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: June 24, 1997
    Assignee: Dennis Tool Company
    Inventors: Mahlon Denton Dennis, Barton Hampshire
  • Patent number: 5631431
    Abstract: The invention relates to an additive for improving the machinability of iron-based powder compositions. The additive contains calcium fluoride particles which are included in an amount of 0.1-0.6% by weight in the powder composition. The invention further relates to powder compositions containing the additives indicated, as well as sintered products produced from the powder compositions.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: May 20, 1997
    Assignee: Hoganas AB
    Inventor: Owe Andersson
  • Patent number: 5614036
    Abstract: A high heat resisting and high abrasion resisting aluminum alloy and aluminum alloy powder have superior toughness, abrasion resistance, high temperature strength, and creep resistance and are useful to form engine parts for automobiles, airplanes, etc. The high heat resisting and high abrasion resisting aluminum alloy comprises 2 to 15 wt % of Ni, 0.2 to 15 wt % of Si, 0.6 to 8.0 wt % of Fe, one or two of 0.6 to 5.0 wt % of Cu and 0.5 to 3 wt % of Mg, the total amount of Cu and Mg being equal to or less than 6 wt %, one or two of 0.3 to 3 wt % of Zr and 0.3 to 3 wt % of Mo, the total amount of Zr and Mo being equal to or less than 4 wt %, 0.05 to 10 wt % of B, and the balance of Al and unavoidable impurities, and is produced by powder metallurgy.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: March 25, 1997
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyo Aluminium Kabushiki Kaisha
    Inventors: Kunihiko Imahashi, Hirohisa Miura, Yasuhiro Yamada, Hirofumi Michioka, Jun Kusui, Akiei Tanaka
  • Patent number: 5613183
    Abstract: The disclosure relates to a method of binder removal from a green body before sintering or the like wherein the green body is initially heated to a temperature above the melting or flow point of the binder to liquify the binder and, at the elevated temperature, a small portion of the green body is brought into intimate contact with a non-supporting porous body of lower capillarity potential for the liquid binder. The liquid is drawn from all parts of the green body to the region of contact between the porous body and the green body and enters the body of lower capillarity potential preferentially, removing liquid from the green body through the surface of the green body only at said region of contact. The draining is continued with or without further increase in temperature until the green body is opened or becomes permeable.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 18, 1997
    Assignee: Witec Cayman Patents Limited
    Inventor: Raymond E. Wiech, Jr.
  • Patent number: 5605558
    Abstract: A nitrogenous Al--Si powder metallurgical alloy contains at least 4 wt % and at most 15 wt % of nitrogen, with the remaining part consisting essentially of Al, Si and an unavoidable component. Consequently, a highly safe material which is lightweight and has a density of at most 3.0 g/cm.sup.3, a thermal expansion coefficient in the range of 5 to 10.times.10.sup.-6 /.degree.C., and a thermal conductivity coefficient of at least 0.2 cal/cm.multidot.sec.multidot..degree.C. has been obtained.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: February 25, 1997
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Shin-ichi Yamagata, Yoshishige Takano, Tetsuya Hayashi, Yugaku Abe
  • Patent number: 5590392
    Abstract: A corrosion-resistant material for the construction of a member destined to contact molten metal comprises a matrix of a refractory metal and a powder of the oxide of at least one metallic element selected from the group consisting of the same metallic element as the molten metal and metallic elements having lower levels of free energy for the formation of an oxide than the molten metal, the powder of the oxide being dispersed and disposed in the matrix. The refractory metal is W, Mo, Ta, Nb, or Re. The metal oxide is selected from the rare earth metal oxides, namely the oxides of the same metallic elements as the molten metals, and the oxides of Ti, Cr, and Zr.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: December 31, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Ishiwata, Yoshiyasu Itoh
  • Patent number: 5569336
    Abstract: The material for permanent magnet according to the present invention comprises an acicular iron powder having successively on the surface (1) a coated layer of aluminum phosphate, (2) a diffused, layer of rare earth element or a diffused layer of rare earth element.multidot.boron or a diffused layer of rare earth element.multidot.boron.multidot.nitrogen, and (3) a coated layer of aluminum phosphate.The material for permanent magnet can be produced by (a) a step of mixing and covering an acicular goethite (FeOOH) crystal with aluminum phosphate, (b) a step of preparing an acicular iron powder coated with a layer of aluminum phosphate by reducing under hydrogen atmosphere at 300.degree.-500.degree. C. the acicular goethite (FeOOH) crystal covered by the aluminum phosphate, (c) a step of diffusing a rare earth element or a rare earth element and boron into the surface layer of aluminum phosphate by heating under argon atmosphere at 650.degree.-1000.degree. C.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 29, 1996
    Assignees: Kawasaki Teitoku Co., Ltd., Komeya, Inc., Sanei Kasei Co., Ltd.
    Inventor: Yasunori Takahashi
  • Patent number: 5545249
    Abstract: A sintered bearing alloy for high-temperature application containing from more than 5 to 10 weight percent h-BN particles having a size of 100 to 500 .mu.m, which are dispersed in the matrix of stainless steel. Granulated h-BN powder is mixed with austenitic stainless steel powder and the resultant blended powder is formed into a green compact by compression, after which the green compact is sintered.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: August 13, 1996
    Assignee: Daido Metal Company Ltd.
    Inventors: Tadashi Tanaka, Masaaki Sakamoto, Koichi Yamamoto, Kouki Ozaki
  • Patent number: 5534220
    Abstract: A method is described for the manufacture of a sintered ferrous-based material having improved machinability, the method comprises the steps of making a mixture of a ferrous-based powder, the mixture including a compound containing at least one metal from the group comprising manganese and the alkaline-earth series of metals; at least one sulphur donating material; pressing the powder mixture and sintering the pressed mixture so as to cause the formation by reaction during sintering of at least one stable metal sulphide within the sintered material. Materials and articles made by the method are also described.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: July 9, 1996
    Assignee: Brico Engineering Limited
    Inventors: Charles G. Purnell, Mohammad S. Mahmoud, Helen A. Brownlie
  • Patent number: 5529600
    Abstract: A material for friction components made by a process including the steps of providing a first powder consisting of grains of a comparatively harder material with a comparatively higher coefficient of friction and an average grain size of from 60 to 100 microns, and a second powder consisting of grains of comparatively softer material with a comparatively lower coefficient of friction and an average grain size of from 60 to 100 microns; mixing the first powder and the second powder to form a powder mixture having a total volume; and subjecting the powder mixture to a pressure and temperature sufficient for the grains of the first powder to be intermixed with the comparatively softer material of the second powder so that the comparatively harder material substantially fills an intergranular space between the grains of the first powder to form the material for the friction components, the comparatively harder material occupying from 1/3 to 4/5 of the total volume of the powder mixture.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: June 25, 1996
    Assignee: Sintermetal S.A.
    Inventors: Antonio R. Fernandez, Pascal Belair, Jean R. Gras
  • Patent number: 5501728
    Abstract: The present invention relates to a friction material for use in manufacturing various friction bearing components such as brakes, clutches, couplings, transmission systems and the like. The composition of the friction material includes a base friction material and a metal sulfide-iron powder alloy mixture which is added to the base material and further mixed prior to compression molding the desired component.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: March 26, 1996
    Assignee: Brake Pro, Inc.
    Inventors: Christopher C. Shepley, David R. Carter
  • Patent number: 5500289
    Abstract: A sinterable powder mix for the production of a tungsten-based cemented carbide material, said powder mix comprising at least 70% by weight of WC, from about 2 to about 15% by weight of an iron group metal binder, and optionally up to about 15% by weight of one or more carbides, nitrides and carbonitrides of metals of the groups IVb, Vb and VIb of the periodic table; characterized in thatsaid powder mix comprises from about 1 to about 8% by weight of Ta(Nb) oxide and powdered elemental carbon in about the stoichiometric amount required for the reaction:Ta(Nb).sub.2 O.sub.5 +7C.fwdarw.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: March 19, 1996
    Assignee: ISCAR Ltd.
    Inventor: Ilan Gavish
  • Patent number: 5482530
    Abstract: The invention relates to cobalt metal powders as a binder metal for the production of diamond and/or hard-metal tools and/or wear-resistant coatings and to composite sintered articles produced therefrom.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: January 9, 1996
    Assignee: H,C. Starck GmbH & Co. KG
    Inventor: Matthias Hohne
  • Patent number: 5462808
    Abstract: A high-rigidity composite material having a Young's modulus larger than 25,000 kgf/mm.sup.2 is disclosed, in which particles are dispersed in a matrix of a ferritic steel, and the degree of accumulation of {111} planes in a plane perpendicular to a given direction, in terms of X-ray diffraction intensity, is 30 times larger than that of equiaxial polycrystals.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: October 31, 1995
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazutaka Asabe, Masaru Nishiguchi, Sukeyoshi Yamamoto
  • Patent number: 5454999
    Abstract: A method of producing a composite powder by providing particles of, e.g., molybdenum, silicon and carbon, in a proportion relative to each other so as to possess an overall chemical composition in that segment of the ternary diagram of FIG. 1 designated A, and subjecting the particles to a mechanical alloying process under conditions and for a time sufficient to produce the composite powder. Also disclosed is a method of forming a substantially silica-free composition of matter comprising a matrix substance of MoSi.sub.2 having SiC dispersed therein, the method comprising consolidating the above-described composite powder. Also disclosed is a method of forming oxidation- and wear-resistant coatings by subjecting the composite powder whose composition lies in segment A to a metallurgical process such as plasma spraying. A method of forming a composite material of uniformly dispersed particles of silicon carbide in a silicide or an alloy silicide matrix, particularly molybdenum disilicide, is also disclosed.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: October 3, 1995
    Assignee: University of Florida
    Inventors: S. Jayashankar, Michael J. Kaufman
  • Patent number: 5443615
    Abstract: A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq.Cr<2 wt. % and 0.1.ltoreq.Ni<10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: 0<Fe<5 wt. %, 0.ltoreq.Co<5 wt. %, 0.ltoreq.Al<10 wt. % 0.ltoreq.Ti<20 wt. %, 0.ltoreq.Mo<3 wt. %, 0.ltoreq.Si<3 wt. % 0.ltoreq.V<3 wt. % 0.ltoreq.Mg<1 wt. % and 0.ltoreq.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: August 22, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuo Kuwabara, Kiyoshi Ikegami, Teruaki Yoshida, Koji Takahashi, Tamotsu Harada, Takeshi Komiyama, Fumio Hirai, Masamichi Hayashi
  • Patent number: 5441553
    Abstract: A compacted, single phase or multiphase composite article. Particles for use in the compacted article are produced by providing a precursor compound containing at least one or at least two metals and a coordinating ligand. The compound is heated to remove the coordinating ligand therefrom and increase the surface area thereof. It may then be reacted so that at least one metal forms a metal-containing compound. The particles may be consolidated to form a compacted article, and for this purpose may be used in combination with graphite or diamonds. The metal-containing compound may be a nonmetallic compound including carbides, nitrides and carbonitrides of a refractory metal, such as tungsten. The metal-containing compound may be dispersed in a metal matrix, such as iron, nickel or cobalt. The dispersed nonmetallic compound particles are no larger than about 0.1 micron in particle size and have a volume fraction greater than about 0.15 within the metal matrix.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: August 15, 1995
    Assignee: Exxon Research and Engineering Company
    Inventors: Richard S. Polizzotti, Larry E. McCandlish, Edwin L. Kugler
  • Patent number: 5409518
    Abstract: A sintered titanium alloy is composed of a titanium matrix or titanium alloy matrix and hard particles dispersed in the matrix, the sintered titanium alloy comprises: 4-8 mass % of aluminum (Al); 2-6 mass % of vanadium (V); 0.15-0.8 mass % of oxygen (O); at least one element selected from the group consisting of 0.2-9 mass % of boron (B), 0.5-3 mass % of at least one of molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), niobium (Nb), and hafnium (Hf), 0.05-2 mass % of at least one of Ia Group elements, IIa Group elements, and IIIa Group elements, 0.05-0.5 mass % of at least one of halogens; with the balance being titanium (Ti) and inevitable impurities.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: April 25, 1995
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Takashi Saito, Tadahiko Furuta
  • Patent number: 5403371
    Abstract: An iron-based powder for making wear-resisting and heat-resisting components by compacting and sintering consists of, in addition to Fe, 3-15% by weight of Mo and/or 3-20% by weight of W, the total amount of Mo+W being in the range off 3-20% by weight; 0.2-1.0% by weight of P; 0.5-1.5% by weight of C. A component is powder-metallurgically made of this iron-based powder by compacting the powder into the desired shape and sintering the compact at a temperature below about 1150.degree. C.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: April 4, 1995
    Assignee: Hoganas AB
    Inventors: Per Engdahl, Dragan Spasic, Ralf Johansson
  • Patent number: 5399187
    Abstract: A composite lead-free bullet is disclosed comprising a heavy constituents selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten and a second binder constituent consisting of either a metal alloy or a plastic blend.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: March 21, 1995
    Assignee: Olin Corporation
    Inventors: Brian Mravic, Deepak Mahulikar, Gerald N. Violette, Eugene Shapiro, Henry J. Halverson
  • Patent number: 5388810
    Abstract: A cermet crucible for metallurgically processing metals having high melting points comprising a body consisting essentially of a mixture of calcium oxide and erbium metal, the mixture comprising calcium oxide in a range between about 50 and 90% by weight and erbium metal in a range between about 10 and 50% by weight.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: February 14, 1995
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Christopher P. Boring
  • Patent number: 5387272
    Abstract: The present invention provides an Al-Si based sintered alloy of high strength and high ductility, a method for production thereof and use thereof. The alloy comprises 1-45% of Si, 0.1-20% of an element of Group IIIa, 0.01-5% of at least one element of Groups IVa and Va, the balance of substantially Al. This alloy can further contain at least one of 0.01-5% of Cu, 0.01-5% of Mg, 2.0% or less of Fe, 1.5% or less of Mn and 1.5% or less of Co and the oxygen content is reduced to 0.15% or less by sintering under vacuum. The present invention is applied to automobile parts such as a piston and scroll compressors. The alloy has a tensile strength of about 40 kg/mm.sup.2 or higher and an elongation of 1.5% or more at 150.degree. C.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: February 7, 1995
    Assignees: Hitachi, Ltd., Hitachi Powdered Metals Company, Limited
    Inventors: Yasuo Kamitsuma, Yusaku Nakagawa, Mitsuo Chigasaki, Tadashi Iizuka, Kooichi Inaba, Keiichi Nakamura, Masaki Minabe, Tsuyoshi Kagaya
  • Patent number: 5378426
    Abstract: Metal particulates and porous metal media, which have enhanced resistance to undesirable oxidation, and methods of producing the same are provided. The porous metal media comprise sintered metal particulates each typically having a core and a surface and a diameter in the range of 0.25 to 50 micrometers, the particulates comprising at least about 60 wt. % of a base metal including at least one of iron and nickel, at least about 11 wt. % chromium and no more than about 0.03 wt. % carbon. The surfaces of the particulates are enriched with at least one treatment element in an amount and depth sufficient to enhance the resistance of the particulates to undesirable oxidation. The invention also includes a fine metal filter medium formed from sintered metal fibers, which has enhanced resistance to corrosion and/or to high temperature oxidation.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: January 3, 1995
    Assignee: Pall Corporation
    Inventors: Stephen A. Geibel, John L. Hurley, Sandra L. Brosious
  • Patent number: 5368628
    Abstract: An article made of an ultra fine grained cemented carbide material and a process for making the same.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: November 29, 1994
    Assignee: Valenite Inc.
    Inventor: John W. Friederichs
  • Patent number: 5364442
    Abstract: A composite electrode for electrochemical processing having improved high temperature properties, and a process for making the electrode by combustion synthesis. A composition from which the electrode is made by combustion synthesis comprises from about 4% to about 90% by weight of a particulate or fibrous combustible mixture which, when ignited, is capable of forming an interconnected network of a ceramic or metal-ceramic composite, and from about 10% to about 60% by weight of a particulate or fibrous filler material capable of providing the electrode with improved oxidation resistance and maintenance of adequate electrical conductivity at temperatures above 1000.degree. C. The filler material is molybdenum silicide, silicon carbide, titanium carbide, boron carbide, boron nitride, zirconium boride, cerium oxide, cerium oxyfluoride, or mixtures thereof.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: November 15, 1994
    Assignee: Moltech Invent S.A.
    Inventor: Jainagesh A. Sekhar
  • Patent number: 5340531
    Abstract: A method for producing a substantially silica-free composition of matter comprising a matrix of MoSi.sub.2 having SiC dispersed therein, the matrix being reinforced with a particulate ductile refractory metal, the method comprising providing a composite of the particulate ductile refractory metal and a substantially silica-free composite mechanical alloy powder comprising MoSi.sub.2 and SiC having a composition in that segment of the ternary diagram of FIG. 1 designated A, and consolidating the composite of particulate ductile refractory metal and mechanical alloy powder; the coefficient of thermal expansion of the MoSi.sub.2 matrix having SiC dispersed therein being substantially equivalent to that of the particulate ductile refractory metal. The composition of matter formed by the method and an article of manufacture comprising the same are also disclosed.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: August 23, 1994
    Assignee: University of Florida
    Inventors: S. Jayashankar, Michael J. Kaufman
  • Patent number: 5336292
    Abstract: A sintered body of titanium-based carbonitride alloy according to the invention comprises carbonitride hard constituents in 5-25% binder phase where the hard constituents contain, in addition to Ti, one or more of the metals Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and the binder phase is based on cobalt and/or nickel. The sintered body has at least one outer surface with a <50 .mu.m thick surface layer of a titanium-rich cubic carbonitride. Below this layer there is a <100 .mu.m thick binder phase enrichment zone. The binder phase content can be >1.2 of that in the inner part of the body D. Under the binder phase enrichment zone, there is a <250 .mu.m thick binder phase depleted zone C. The binder phase content in this zone has a lowest level <0.9 of the binder phase content in the inner part of the body D.Such sintered bodies are manufactured by heat treatment in an atmosphere of N.sub.2 and/or NH.sub.3 possibly in combination with at least one of CH.sub.4, CO and CO.sub.2 at 1100.degree.-1350.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: August 9, 1994
    Assignee: Sandvik AB
    Inventors: Gerold Weinl, Marian Mikus
  • Patent number: 5330590
    Abstract: Cr.sub.3 Si is alloyed with molybdenum which produces a two-phase microstructure of (Cr,Mo).sub.3 Si and (Cr,Mo).sub.5 Si.sub.3. About 50 weight percent of molybdenum is present in the alloy. The alloy forms two protective oxides over a wide range of temperatures. Chromium and molybdenum oxide volatize under flowing air at high temperatures above 1200.degree. C. which facilitates the formation of SiO.sub.2 on the surface. Below 1200.degree. C. Cr.sub.2 O.sub.3 is formed. The new alloy has excellent high temperature strength and creep properties.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: July 19, 1994
    Assignee: The United States of America, as represented by the Administrator of the National Aeronautics & Space Administration
    Inventor: Sai V. Raj
  • Patent number: 5326526
    Abstract: Sintered iron alloy composition and method of manufacturing the same, the sintered alloy composition comprising: about 1.5 to about 2.5% carbon by weight; about 0.5 to about 0.9% manganese by weight; about 0.1 to about 0.2% sulfur by weight; about 1.9 to about 2.5% chromium by weight; about 0.15 to about 0.3% molybdenum by weight; about 2 to about 6% copper by weight; not more than about 0.3% by weight of a metal element material comprising at least one member selected from the group consisting of tungsten and vanadium; an effective content of a first solid lubricant material comprising at least one member selected from the group consisting of magnesium metasilicate minerals and magnesium orthosilicate minerals; and balance iron. This alloy composition is preferably used for making machine parts, such as slide members of valve operating systems for internal combustion engines.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: July 5, 1994
    Assignees: Hitachi Powdered Metals Co., Ltd., Nissan Motor Co., Ltd.
    Inventors: Yutaka Ikenoue, Koichiro Hayashi, Makoto Kano, Akira Fujiki
  • Patent number: 5314656
    Abstract: Transition metal carbonitrides (in particular, titanium carbonitride, TiC.sub.0.5 N.sub.0.5) are synthesized by a self-propagating reaction between the metal (e.g., titanium) and carbon in a nitrogen atmosphere. Complete conversion to the carbonitride phase is achieved with the addition of TiN as diluent and with a nitrogen pressure .gtoreq.0.6 MPa. Thermodynamic phase-stability calculations and experimental characterizations of quenched samples provided revealed that the mechanism of formation of the carbonitride is a two-step process. The first step involves the formation of the nonstoichiometric carbide, TiC.sub.0.5, and is followed by the formation of the product by the incorporation of nitrogen in the defect-structure carbide.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: May 24, 1994
    Assignee: The Regents of the University of California
    Inventors: Zuhair A. R. Munir, Maryam Eslamloo-Grami
  • Patent number: 5306568
    Abstract: A high Young's modulus material comprises carbon steel or alloying steel and contains a particular amount of hard particles having a Young's modulus of not less than 24,000 kgf/mm.sup.2. Furthermore, a surface-coated tool member comprises a substrate comprised of carbon steel or alloying steel and a hard coating layer having a Young's modulus of not less than 24,000 kgf/mm.sup.2 in which the substrate contains a particular amount of hard particles having a Young's modulus of not less than 24,000 kgf/mm.sup.2.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: April 26, 1994
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Yukinori Matsuda, Kozo Ozaki, Koichi Sudo
  • Patent number: 5296016
    Abstract: There is disclosed a surface coated cermet blade member which includes a cermet substrate and a hard coating of an average thickness of 0.5 to 20 .mu.m formed thereon. The substrate contains, apart from unavoidable impurities, a binder phase of 5 to 30% by weight of at least one of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals. The metals are titanium, tungsten and at least one of tantalum, niobium, vanadium, zirconium, molybdenum and chromium. The substrate includes a surface portion having a hardness greater than an interior portion. The hard coating may be composed of one or more coating layers. Each coating layer is formed of TiX or Al.sub.2 O.sub.3, where X denotes at least one element of carbon, nitrogen, oxygen and boron.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: March 22, 1994
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hironori Yoshimura, Seiichirou Nakamura, Niro Odani