Interconnected Void Structure (e.g., Permeable, Etc.) Patents (Class 428/566)
  • Patent number: 4331477
    Abstract: 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: Grant
    Filed: October 4, 1979
    Date of Patent: May 25, 1982
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Yoshimi Kubo, Hitoshi Igarashi
  • Patent number: 4310601
    Abstract: 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: Grant
    Filed: December 10, 1979
    Date of Patent: January 12, 1982
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Otto Bernauer, Horst Baier, Helmut Buchner
  • Patent number: 4283465
    Abstract: 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: Grant
    Filed: August 23, 1978
    Date of Patent: August 11, 1981
    Assignee: Nippon Dia Clevite Co., Ltd.
    Inventors: Toru Morimoto, Tsuyoshi Ohsaki, Toshio Ohkawa, Kenji Matsuzawa
  • Patent number: 4277543
    Abstract: 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: Grant
    Filed: November 26, 1979
    Date of Patent: July 7, 1981
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koreaki Nakata, Masahiro Oita, Hyogo Hirohata
  • Patent number: 4274874
    Abstract: 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: Grant
    Filed: September 21, 1979
    Date of Patent: June 23, 1981
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Kunio Obara, Tohru Kohno, Hiroshi Sawaguchi
  • Patent number: 4233071
    Abstract: 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: Grant
    Filed: January 4, 1979
    Date of Patent: November 11, 1980
    Assignee: General Motors Corporation
    Inventors: John C. Bierlein, Edward J. Shipek
  • Patent number: 4230491
    Abstract: 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: Grant
    Filed: January 8, 1979
    Date of Patent: October 28, 1980
    Assignee: Stanadyne, Inc.
    Inventor: Robert C. Behnke
  • Patent number: 4224380
    Abstract: 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: Grant
    Filed: March 28, 1978
    Date of Patent: September 23, 1980
    Assignee: General Electric Company
    Inventors: Harold P. Bovenkerk, Paul D. Gigl
  • Patent number: 4193793
    Abstract: 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: Grant
    Filed: November 9, 1977
    Date of Patent: March 18, 1980
    Assignee: Union Carbide Corporation
    Inventor: Harry Cheung
  • Patent number: 4164606
    Abstract: 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 wick
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: August 14, 1979
    Inventor: Ernst Spirig
  • Patent number: 4154609
    Abstract: 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: Grant
    Filed: February 17, 1977
    Date of Patent: May 15, 1979
    Assignee: Hermann C. Starck Berlin
    Inventor: Reinhard Hahn
  • Patent number: 4115623
    Abstract: 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: Grant
    Filed: August 25, 1976
    Date of Patent: September 19, 1978
    Inventors: Oleg Vadimovich Padalko, Maxim Lvovich Levit, Nikolai Vasilievich Voinov
  • Patent number: 4094673
    Abstract: 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: Grant
    Filed: November 2, 1976
    Date of Patent: June 13, 1978
    Assignee: Brunswick Corporation
    Inventors: Arnold Roderick Erickson, Carlino Panzera
  • Patent number: 4039297
    Abstract: 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: Grant
    Filed: April 11, 1975
    Date of Patent: August 2, 1977
    Assignee: Japanese National Railways
    Inventor: Yasuo Takenaka
  • Patent number: 4023253
    Abstract: 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: Grant
    Filed: October 14, 1975
    Date of Patent: May 17, 1977
    Inventor: Shinnosuke Funakubo