Interconnected Void Structure (e.g., Permeable, Etc.) Patents (Class 428/566)
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Patent number: 4331477Abstract: A porous, sintered Ti-Al alloy has specific surface area of 0.01-1 m.sup.2 /g, density of 20-80% of theoretical density and good mechanical strength, suitable for use in capacitor anode bodies, catalyzers, filters, etc. A mixed, press-shaped body of 10-90 atom. % Ti powder and 90-10 atom. % Al powder is processed by a first heat-treatment at 500.degree. to 665.degree. C. for 5 to 60 minutes to make it porous and then by a second heat-treatment at 700.degree. to 1300.degree. C. for 5 to 60 minutes to increase mechanical strength.Type: GrantFiled: October 4, 1979Date of Patent: May 25, 1982Assignee: Nippon Electric Co., Ltd.Inventors: Yoshimi Kubo, Hitoshi Igarashi
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Patent number: 4310601Abstract: A metal hydride storage device with a hydrogenatable storage metal powder and with an encapsulation of non-hydrogenatable material receiving the storage metal powder; the storage metal powder with a substantially uniformly distributed addition of about 2 to 10% by weight of powder-shaped non-hydrogenatable material forming a matrix powder, is contained in the encapsulation as form-rigid compressed or sintered body.Type: GrantFiled: December 10, 1979Date of Patent: January 12, 1982Assignee: Daimler-Benz AktiengesellschaftInventors: Otto Bernauer, Horst Baier, Helmut Buchner
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Patent number: 4283465Abstract: A porous sintered material of good permeability and effective sound absorbability, being formed by combining between particles of aluminum or aluminum alloy powder into a body by means of sintering and having connecting pores among the particles of said aluminum or aluminum alloy powder. Said porous sintered material is obtained by mixing aluminum or an aluminum alloy with a low melting point aluminum alloy, forming the mixture into the predetermined shape and sintering it at a temperature which is at least 10.degree. C. lower than the melting point of the base material and higher than that of the low melting point material.Type: GrantFiled: August 23, 1978Date of Patent: August 11, 1981Assignee: Nippon Dia Clevite Co., Ltd.Inventors: Toru Morimoto, Tsuyoshi Ohsaki, Toshio Ohkawa, Kenji Matsuzawa
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Patent number: 4277543Abstract: An anode comprising a porous sintered body made of tantalum powder each particle of which having a layer of at least one of V, Mo and Pd. This anode permits a solid electrolytic capacitor to have a low reverse current and a low leakage current. This invention also provides an effective method for preparing such anode.Type: GrantFiled: November 26, 1979Date of Patent: July 7, 1981Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koreaki Nakata, Masahiro Oita, Hyogo Hirohata
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Patent number: 4274874Abstract: A copper-tin type sintered alloy for an oil-impregnated bearing excellent in bearing performance particularly as a bearing used in low-load and high-velocity region, having a chemical composition consisting essentially of, in weight percentage:______________________________________ Tin from 8 to 11% Phosphorus from 0.2 to 1.7% ______________________________________at least one solid lubricant, having an average particle size of from 20 to 80 .mu.m, selected from the group consisting of: ______________________________________ Molybdenum disulfide from 1.1 to 11%, and Tungsten disulfide from 1.7 to 17%, ______________________________________Where,the total amount of molybdenum disulfide and tungsten disulfide being up to 17%;and,the balance copper and incidental impurities;said sintered alloy being prepared by sintering a green compact having said chemical composition at a temperature of from 650.degree. to 750.degree. C.Type: GrantFiled: September 21, 1979Date of Patent: June 23, 1981Assignee: Mitsubishi Kinzoku Kabushiki KaishaInventors: Kunio Obara, Tohru Kohno, Hiroshi Sawaguchi
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Patent number: 4233071Abstract: A bearing with or without a backing comprising a sintered porous body formed of a composition containing 1/2 to 6% by weight sulfur, 0 to 60% copper, and the balance iron. The body may be impregnated with a lubricant.Type: GrantFiled: January 4, 1979Date of Patent: November 11, 1980Assignee: General Motors CorporationInventors: John C. Bierlein, Edward J. Shipek
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Patent number: 4230491Abstract: An internal combustion engine tappet comprising a sintered powdered metal wear resistant composition having a matrix formed from iron powder, carbon in the range of 0.50-1.0% by weight, and a ferroalloy powder with a mesh size of +50-325 acting as a nucleus for diffusion of the alloying metal into the surrounding iron particles. The alloying metal in the composition is in the range of 1-10% by weight and is selected from the group consisting of chromium, titanium, boron, vanadium, columbium, molybdenum, tantalum and tungsten. The iron, carbon and ferroalloy are briquetted at a pressure of 40-60 tons/sq.in. and sintered, in solid phase, at a temperature of 2000.degree.-2100.degree. F. in a reducing atmosphere. The resulting product is heterogeneous and has hard ferroalloy nuclei and interconnected porosity with a density at the tappet wear surface of approximately 6.8-7.0 gm/cc.Type: GrantFiled: January 8, 1979Date of Patent: October 28, 1980Assignee: Stanadyne, Inc.Inventor: Robert C. Behnke
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Patent number: 4224380Abstract: In one embodiment, a compact for tools, such as cutting, drilling and shaping tools, consists essentially of self-bonded abrasive particles. The bonded particles define a substantially continuous interconnected network of pores, dispersed throughout the compact. The method for making such a compact comprises the steps of bonding a mass of abrasive particles, aided by a sintering aid material, under high temperatures and pressures (HP/HT) to form an abrasive body comprised of said particles in a self-bonded form and said material infiltrated throughout the body. The body is then treated to remove substantially all infiltrated material, thereby to produce a compact consisting essentially of the self-bonded abrasive particles. In another embodiment, a composite compact which is made in a similar manner to the first embodiment consists essentially of a layer of self-bonded abrasive particle and a substrate layer (preferably of cemented carbide) bonded to the abrasive particle layer.Type: GrantFiled: March 28, 1978Date of Patent: September 23, 1980Assignee: General Electric CompanyInventors: Harold P. Bovenkerk, Paul D. Gigl
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Patent number: 4193793Abstract: A porous composite structure comprising a sintered mixture of metal particles and alumina particles, and a method for producing this composite. The composite is useful as a catalyst support, particularly in apparatus designed to reduce pollutant emissions from automobile engines.Type: GrantFiled: November 9, 1977Date of Patent: March 18, 1980Assignee: Union Carbide CorporationInventor: Harry Cheung
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Patent number: 4164606Abstract: A device for removing a solder alloy from a solid soldered joint comprising a multiplicity of metallic strands formed into an elongated wick operable to effect the solder removal through the application of an end portion thereof to the joint in heat exchange relation to a heat source so that when the solder alloy is rendered molten by the heat source it will flow by capillary action from the joint into the applied end portion of the wick, the improved step of each metallic strand of the wick having its exterior surface coated with solidified solder alloy having a melting point substantially below the melting point of tin prior to being formed into the wick so that when the end portion thereof is applied to the joint in heat exchange relation with the heat source as aforesaid the solid solder alloy of the coating on the strands of the applied end portion when rendered molten by the heat source mixes with the molten solder alloy from the joint flowing by capillary action into the applied end portion of the wickType: GrantFiled: November 8, 1977Date of Patent: August 14, 1979Inventor: Ernst Spirig
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Patent number: 4154609Abstract: The production of highly porous sintered bodies useful for the manufacture of electrolytic capacitors by using as a lubricant for the base metal powder, usually tantalum, about 0.01 to about 10% by weight of an inorganic lubricant, particularly a sulfide, selenide or telluride of a metal of subgroup V or VI of the Periodic Table or nitrides of boron or silicon.Type: GrantFiled: February 17, 1977Date of Patent: May 15, 1979Assignee: Hermann C. Starck BerlinInventor: Reinhard Hahn
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Patent number: 4115623Abstract: The porous material adapted for making a tool-electrode therefrom features the porosity up to 15 - 25 percent of its volume, pore size within 10 to 40 microns and oxygen content up to 0.1 wt.%.The method proposed for producing such a material resides in hot compression moulding of a powdery electrode material. The powdery material is first heated in a compression mould to a temperature equaling 0.3 to 0.5 of the melting temperature in degrees centigrade while pumping a gaseous reducing agent therethrough at a pressure of 1.2 - 1.8 atm, whereupon the powdery material is held for some lapse of time at that temperature, while continuing to feed said reducing gas in a quantity exceeding the stoichiometric one. Next the powdery material is heated to a temperature in degrees centigrade equal to 0.6 to 0.9 of the melting temperature, and a pressure is applied thereto to obtain the required porosity of the material being prepared.Type: GrantFiled: August 25, 1976Date of Patent: September 19, 1978Inventors: Oleg Vadimovich Padalko, Maxim Lvovich Levit, Nikolai Vasilievich Voinov
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Patent number: 4094673Abstract: An abradable seal material suitable for high temperature application in turbomachinery comprising a sintered mat of (1) randomly disposed fine metal fibers, or (2) fine metal powders or (3) both fibers and powders. The metal fiber and powder are composed of an alloy consisting essentially of I, Al, Cr, II, or I, Al, Cr, III, wherein I is at least one member of the group Fe, Co, Ni, and Co plus Ni, II is a member of the group consisting of Y, Sc and Rare Earths, and III is at least one member of the group consisting of Si, Hf, Zr, Cb, and Ta. The exposed surfaces of the fibers and powder forming the seal are protected against oxidation at high temperatures by a coating of Al.sub.2 O.sub.3 which is formed on the substrate. Said substrate has an Al content of at least 4% to replace spalled Al.sub.2 O.sub.3 and for "healing" any Al.sub.2 O.sub.3 scale fractures.Type: GrantFiled: November 2, 1976Date of Patent: June 13, 1978Assignee: Brunswick CorporationInventors: Arnold Roderick Erickson, Carlino Panzera
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Patent number: 4039297Abstract: The present invention relates to improved heat insulating particles with a high heat insulating effect and high mechanical strength. The particles are smooth cells formed around hollow or solid grains of a low heat-conducting material such as silica, alumina, glass, or a synthetic resin like nylon or teflon, which are coated with a material that can readily reflect the heat radiation such as aluminum, copper, gold, silver, stainless steel or titanium. The cells thus-formed are bound together by sintering in the form of a block or any other desirable shape so that the metallic surface cells are bonded together at their points of contact through molecular dispersion of the metal molecules of the respective surfaces.Type: GrantFiled: April 11, 1975Date of Patent: August 2, 1977Assignee: Japanese National RailwaysInventor: Yasuo Takenaka
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Patent number: 4023253Abstract: A grinder plate for meat choppers having integral polygonal through holes is produced by powder metallurgy, and pores given to the plate at a porosity of 5 - 15% are impregnated with oil for providing the plate with self-cleaning and self-sharpening effects.Type: GrantFiled: October 14, 1975Date of Patent: May 17, 1977Inventor: Shinnosuke Funakubo