Abstract: A dispersion strengthened copper alloy and a method for producing the alloy are provided. The alloy preferably comprises aluminum, titanium and hafnium as alloying elements that are internally oxidized under controlled conditions to produce a dispersion strengthened copper material having good hardness and high conductivity. A method for reducing the adverse effects of hydrogen on such materials is also provided. The dispersion strengthened material can be useful in many applications, including welding electrodes and electrical contacts.

Abstract: The invention relates to a process for preparing sintered shapes, comprising the steps of:(1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one carboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylatin

Abstract: The invention relates to a method of forming honeycomb structures having cross-directional flow channels, such as cross-flow cellular bodies using a novel movable die which is adapted to move while extrudate is passing through the die, thus causing the cells or channels to alternate between straight-through flow, Z-flow, L-flow, U-flow or other similar cross-directional flow patterns. This novel die arrangement may be comprised of either a single movable die body, or a plurality of die parts or sections all of which are independently movable relative to the other.

Abstract: A process is disclosed for producing an aluminum or an aluminum alloy sintering, comprising successive steps of maintaining a rare gas atmosphere inside a sintering furnace while heating a compact of aluminum particles or aluminum alloy particles, together with a magnesium source; reducing the pressure inside the sintering furnace while heating further for thereby sublimating magnesium nitrogen to generate Mg.sub.3 N.sub.2 and bringing the generated Mg.sub.3 N.sub.2 into contact with Al.sub.2 O.sub.3 in the surface of the compact for the reduction of Al.sub.2 O.sub.3, thereby effecting heating and sintering at a temperature lower than the melting point of aluminum. The process increases the bonding strength of the aluminum alloy particles while fully taking the advantage of a sintering process. Thus, it enables aluminum sinterings or aluminum-alloy sinterings improved in yield point, strength, and elongation.

Abstract: An unsintered aluminum nitride body including:(a) 1 to 5 weight percent of a vitreous solid of boria, alumina, and calcia in the proportions of (1) boria between 3 and 25 weight percent, (2) alumina between 10 and 50 weight percent, and (3) calcia between 40 and 80 weight percent; and(b) aluminum nitride powder as the balance of the aluminum nitride body.The invention further relates to a method of forming the unsintered aluminum nitride body and then sintering it at a temperature between 1550 and 1650 degrees Centrigrade so as to form a dense, thermally conductive aluminum nitride body.

Abstract: In order to form internal conductors of a multilayer ceramic electronic component such as a multilayer ceramic capacitor, copper paste containing copper powder having a mean particle size of 0.3 to 2 .mu.m in a particle size range of 0.1 to 4 .mu.m and ceramic powder having a main component which is common to that of a ceramic material contained in the multilayer ceramic electronic component and being in a particle size range of 0.5 to 8 .mu.m, as well as an organic vehicle and a solvent with the contents of the copper powder and the ceramic powder and the total content of the organic vehicle and the solvent in ranges of 40 to 70 percent by weight, 1 to 15 percent by weight and 25 to 60 percent by weight respectively is applied onto ceramic green sheets. The ceramic green sheets provided with such copper paste films are stacked and fired so that occurrence of voids in the laminate and deformation of the laminate are suppressed in the as-obtained multilayer ceramic electronic component.

Abstract: An electrochemical device including a solid electrolyte and solid electrode composed of materials having different chemical compositions and characterized by different electrical properties but having the same crystalline phase is provided. A method for fabricating an electrochemical device having a solid electrode and solid electrolyte characterized by the same crystalline phase is provided.

Abstract: Superconducting composite comprising a matrix made of superconducting sintered mass composed of perovskite type or quasi-perovskite type oxide and metal phase dispersed in the superconducting mass with a proportion of from 10 to 70 volume % with respect to said composite. The metal phase may consist of at least one of Cu, Ag, Au, Pt, Ni and Zn or their alloys. The superconducting sintered mass may be Ba-Y-Cu-O type compound oxide.

Abstract: A method for preparing deagglomerated fibres and/or particles and for providing the fibres and/or particles with a substantially uniform protective coating, the fibres and/or particles being of a material selected from the group consisting of carbides oxides, nitrides, silicides, borides, metals and graphite, including SiC, TiC, ZrC, WC, NbC, AlN, TiN, BN, Si.sub.3 N.sub.4, MgO, Al.sub.2 O.sub.3, SiO.sub.2, ZrO.sub.2, Fe.sub.2 O.sub.3, Y.sub.2 O.sub.3, steel, tungsten, molybdenum and carbon, the method comprising (a) preparing an inorganic colloid sol, and (b) mixing the fibres and/or particles are deagglomerated and substantially homogeneously distributed. The fibres and/or particles, e.g. SiC whiskers provided with an aluminum oxide coating by treatment with an aluminum hydroxide-based sol, are used for the preparation of metal matrix composite materials, e.g. based on aluminum or an aluminum alloy.

Abstract: A method of preparing dense sintered bodies of beta alumina suitable for solid electrolytes, which comprises preparing a shaped body from a mixture containing an aluminum powder, a sodium compound, a structure stabilizer and a zirconia powder or from a mixture containing an aluminum powder, an alumina powder, a sodium compound, a structure stabilizer and a zirconia powder, and reaction-sintering the shaped body.

Abstract: A process for preparing ceramic composite comprising blending TiC particulates, Al.sub.2 O.sub.3 particulates and nickle aluminide and consolidating the mixture at a temperature and pressure sufficient to produce a densified ceramic composite having fracture toughness equal to or greater than 7 MPa m.sup.1/2, a hardness equal to or greater than 18 GPa.

Abstract: The present invention relates to a method for manufacturing a heating element, the method including the steps of: a) providing powders of two metals; b) mixing the powders; c) grinding the mixed powders; d) compacting the mixed powders to form a green compact; e) sintering the green compact in a first atmosphere; f) plastically working and process annealing the green compact; g) etching a surface of the green compact to cause pores thereon; and h) sintering the etched green compact in an oxidizing atmosphere. A Ni-Cr heating element manufactured by the present method has improved high temperature properties and a fusion temperature 300.degree. C. greater than those of conventional Ni-Cr heating elements.

Abstract: Molybdenum disilicide base materials and methods for producing them are described. Mixtures of MoSi.sub.2 powder and other powders including SiO.sub.2, Si.sub.3 N.sub.4, SiC and Mo.sub.5 Si.sub.3 are plasma sprayed. Another embodiment which involves oxidation of MoSi.sub.2 is also disclosed. The resistant materials have particular utility as coatings for Nb alloys.

Abstract: A method is provided for manufacturing a bladed ring for drum-shaped rotors of turbomachinery, especially rotors for axial compressors of gas turbine engines. The bladed ring is to be manufactured by hot isostatic pressing (HIP) and the fiber rings are formed in a metallic powder material for the bladed ring arranged in a circumferential direction. The fiber rings are bonded with spacing therebetween. The fiber rings are reinforced by fibers embedded in a metal matrix. The bladed ring prefabricated in this fashion by HIP is machined down to its required dimensions.

Abstract: A novel metal filled via composition for use with ceramics. The via composition can be formulated to have a volume shrinkage approximating that of the ceramic material, and thus overcomes the problem of volume shrinkage mismatch between the via (particularly copper filled via) and ceramic upon sintering. The novel via composition exhibits enhanced adhesion to the ceramic. A sintering process by which shrinkage of the novel via composition is controlled and adhesion is improved is also disclosed.

Abstract: A method of manufacturing an Ni--Al intermetallic compound matrix composite comprising steps of a) providing an aluminum powder, b) providing a reinforced material, c) providing a reducing solution containing a reducing agent and nickel ions to be reduced, d) adding the aluminum powder and the reinforced material into the reducing solution, and e) permitting the reducing agent to reduce the nickel ions to be respectively deposited on the aluminum powder and the reinforced material. Such method permits the Ni--Al, Ni--Al+B intermetallic compound matrix composite to be produced inexpensively/efficiently/fastly.

Abstract: The invention provides aluminum sintered alloys with high dimensional accuracy and high density which are superior in mechanical and physical characteristics as well as wear resistance, and a method of producing such alloys not by plastic working but by atmospheric sintering with high economy. Rapidly solidified aluminum alloy powder resulting from solidifying aluminum alloy molten metal containing 0.4 to 4.0% by weight of Mg at a solidification rate of 10.sup.2 .degree. C./sec or more is press molded in the cold, after annealing in the temperature range of 250 to 450.degree. C. if necessary, and then the molded product is sintered by generating nitrogen compounds on the powder surface at atmospheric pressure with a nitrogen partial pressure of 0.8 atm or more and a steam partial pressure of 0.01 atm or less in which a reducing gas component has been added as a nitrogen-combining acceleration gas component by 0.01 atm or more. Thus, a nitrogen-combined aluminum sintered alloy containing 0.4 to 4.

Abstract: A fully dense ceramic-metal body including 40-88 v/o of an oxide hard phase of, in v/o of the body, 4-88 v/o M-aluminum binary oxides, where the binary oxide has a C-type rare earth, garnet, .beta.-MAl.sub.11 O.sub.18, or perovskite crystal structure, and M is a lanthanide or indium, and 0-79 v/o .alpha.-alumina; about 10-50 v/o of a hard refractory carbide, nitride, or boride as a reinforcing phase; and about 2-10 v/o of a dispersed metal phase combining Ni and Al mostly segregated at triple points of the microstructure. The preferred metal phase contains a substantial amount of the Ni.sub.3 Al ordered crystal structure. In the preferred body, the reinforcing phase is silicon carbide partially incorporated into the oxide grains, and bridges the grain boundaries. The body including a segregated metal phase is produced by densifying a mixture of the hard phase components and the metal component, with the metal component being present in the starting formulation as Ni powder and Al powder.

Abstract: A ceramic composite may be densified, strengthened and toughened by the present transient plastic phase processing method. The ceramic composite comprises a transient plastic phase and a reactant phase. The transient plastic phase includes a metallic component and may also include a non-metallic component. The transient plastic phase has a yield strength which is a function of the stoichiometric concentration of the metallic component therein. In the present method, heat and pressure are applied to the ceramic composite to plastically deform the transient plastic phase of the composite and densify the composite. The densified composite is heated to react the transient plastic phase and the reactant phase in the solid state at a reaction temperature lower than the melting temperature of either of the transient plastic phase or the reactant phase.

Abstract: A heat-resistant metallic monolith manufactured by forming metal powders into a honeycomb structure and by sintering the structure, a heat-resistant metal oxide coated on the surface of the cell walls and that of the pores thereof. Such a heat-resistant metallic monolith is manufactured by mixing metal powders, an organic binder and water to prepare a mixture, by forming the mixture into a shape of a desired honeycomb configuration, by sintering the shape in a non-oxidizing atmosphere at a temperature between 1000.degree. and 145.degree. C. and then by coating a heat-resistant metal oxide on a surface of the cell walls and that of the pores of the obtained sintered body.

Abstract: Complex-shaped parts can be produced from powders, for example metal-matrix composites, by injection molding using a mixture of the powders with a suitable binder. The binder must be removed from the powder mixture before the final thermal treatment of the so-called green part. The present invention proposes to remove the binder by surrounding a cast part with a layer of a particulate material and to subject the cast part to isostatic pressure through the surrounding layer which can thus act as an absorbent. The surrounding layer is removed after the isostatic pressing and the part can be subjected to sintering. The method is suitable for example for aluminum-ceramic powder mixtures.

Abstract: A composition for the formation of vias on a ceramic substrate, the composition including (a) at least one powder containing copper, gold, silver, tungsten, molybdenum, nickel, palladium, platinum, aluminium, or an alloy thereof; and (b) 5 to 40 wt %, based on the weight of the powder in the composition, of one or more of an organosilicic compound, an organoaluminium compound, an organozirconium compound, and an organomagnesium compound. A further embodiment of a composition for the formation of vias includes (a) and (b) above and, in addition, (c) a binder material including a cellulose derivative or a heat decomposable polymethamethyl acrylate binder, and (d) a high boiling point organic solvent. The invention also includes a method for use in the formation of vias on a substrate having perforating holes therein. Such a substrate could be a glass ceramic composite substrate, an alumina substrate, a magnesia substrate, a zirconia substrate, or green sheets thereof.

Abstract: A process for producing an electrically conductive mixed oxide comprises sintering a power mixture comprising from 30 to 98% by weight of titanium oxide, in terms of the amount of titanium based on the total amount of all the metallic elements, from 1 to 10% by weight of at least one of titanium metal and titanium hydride, in terms of the amount of titanium based on the total amount of all the metallic elements, and from 1 to 60% by weight of at least one of tantalum oxide and niobium oxide, in terms of the amount of tantalum, niobium, or tantalum and niobium based on the total amount of all of the metallic elements. The process provides a sintered solid comprising titanium, at least one of tantalum and niobium, and a stoichiometrically deficient amount of oxygen.

Abstract: A cermet useful in the fabrication of metal cutting, rockdrilling and mineral tools, as well as wear parts. The cermet comprises (i) a hard phase of a simple boride of a transition metal, a mixture of simple borides of transition metals, or a mixed boride of transition metals; (ii) a binder phase of Fe, Ni, Co, Cr, or alloys thereof; (iii) a dispersion of particles of oxides of transition metals in which the oxygen can be replaced by nitrogen and/or carbon; and (iv) a dispersion of oxides of metals chosen from aluminum and Group IIA and IIIA metals.

Abstract: Process for producing novel fluxed PZT dielectric ceramic compositions having sintering temperatures below about 1000.degree., so as to be non-reactive with electrode layers when co-fired therewith. The PZT is sintered with an effective amount of an eutectic mixture of CuO and an oxide of an alkaline earth metal, preferably barium oxide and/or strontium oxide, to reduce the sintering temperature of the PZT composition below about 1000.degree. C. Dopant such as manganese oxide may be added to reduce the dielectric losses.

Abstract: An article and method of manufacture of a (Bi,Pb)--Sr--Ca--Cu--O superconductor comprisingcalcinating powders of superconductor precursors of PbO, Bi.sub.2 O.sub.3, SrCO.sub.3 or SrO, CaCO.sub.3 or CaO in air to obtain a 2223 superconductor lump and second phases;crushing the lump into powder;molding the powder into a superconductor body;disposing the body within silver powder to form a composite;molding the composite;heat treating the composite to increase the bond strength of the silver powder; andworking the composite into a useable shape by rolling and drawing while applying intermediate and final heat treatments to obtain a final product.

Abstract: A low alloy sintered steel contains at least 0.15 percent by weight and less than 0.8 percent by weight of carbon. Its matrix is formed by a tempered martensite containing prior austenite crystal grains of not more than 15 .mu.m in mean grain size. Pores and nonmetallic inclusions contained in the matrix are not more than 50 .mu.m in maximum diameter, and the density of the low alloy sintered steel is at least 96 percent of theoretical density. A raw material powder for forming the low alloy sintered steel includes iron alloy powder which is prepared by an atomizing process, and is treated with a dry mill in an inert gas atmosphere or in the atmospheric air. Thus, dislocations are introduced into the raw material powder, and nonmetallic inclusions contained in the raw material powder are pulverized to be not more than 50 .mu.m in maximum diameter. Not only static characteristics but also dynamic characteristics, such as fatigue strength, of the low alloy sintered steel are improved.

Abstract: Tin oxide sensors are made by mixing antimony bearing material with tin oxide powder and formation of the sensor by deposition of a slurry of the mixture onto a substrate and drying and sintering the slurry, the antimony bearing material being present in an amount sufficient to render the sensitivity of the sensor to one or more of the gases H.sub.2, CO, or CH.sub.4 , relatively independent of the concentration of oxygen in the range P.sub.O2 10.sup.-1 -1 atm. A further type of a tin oxide gas sensor is disclosed having a resistivity that at a measuring temperature increases with concentration of at least one gas to be measured, the sensor is made by calcining the tin oxide in air at a temperature in excess of 1400.degree. C., or otherwise treating the tin oxide so that it has a state of physical aggregation consistent with being formed in such manner. At a second measuring temperature the resistivity of the sensor to said one gas decreases with increasing gas concentration.

Abstract: An article of manufacture has as its basic structure a piece of a titanium aluminide, such as gamma (TiAl) or alpha-2 (Ti3Al), desirably in the shape of an aircraft gas turbine component. A thermal barrier coating system overlies at least a portion of the surface of the piece of titanium aluminide. The thermal barrier coating system includes a metallic bond coat layer, preferably in the form of a layer of a nickel-based alloy no more than about 0.005 inches thick, that contacts the piece of titanium aluminide, and a ceramic thermal barrier coating layer, preferably a stabilized zirconia such as yttria-stabilized zirconia, overlying the bond coat.

Abstract: Methods of forming composite articles of superconducting materials and metal at ambient temperature by applying a mixture of metal and binder to a ceramic oxide preform to yield a coated preform which is then heat treated to provide composite articles of superconducting ceramic and metal.

Abstract: Method of manufacturing a dispenser cathode, in which method tungsten and a scandium-containing material are mechanically alloyed and the product thus formed is pressed into a cathode body. The cathode body is further provided with a barium-containing component. In the mechanical alloying process the tungsten is highly deformed and the scandium-containing material is mixed with the tungsten so as to be very finely distributed therein, so that an improved dispensation of scandium and hence an improved recovery after ion bombardment of the final cathode is attained.

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: O<Fe< 5 wt. %, O.ltoreq.Co< 5 wt. %, O.ltoreq.Al< 10 wt. %, O.ltoreq.Ti< 20 wt. %, O.ltoreq.Mo< 3 wt. %, O.ltoreq.Si< 3 wt. %, O.ltoreq.V< 3 wt. %, O.ltoreq.Mg< 1 wt. % and O.

Abstract: A process is proposed which serves to produce layer systems for gas sensors, the electrodes essentially being composed of a finely divided ceramic material and finely divided electron-conducting material. The process comprises adding stabilizer oxides to the electrode material in proportions above those necessary for full stabilization. As a result, a layer system having outstanding mechanical properties and high electrode load carrying capacity is obtained by a simple manufacturing process.

Abstract: To prepare an aluminum matrix particle composite alloy, a molten metal, mainly composed of aluminum, containing ceramic particles is disintegrated by atomization, to prepare atomized powder. The atomized powder is mechanically ground/reflocculated with a ball mill or the like, to prepare mechanically ground/reflocculated powder containing ceramic particles of not more than 8 .mu.m in maximum diameter and not more than 3 .mu.m in mean particle diameter. The mechanically ground/reflocculated powder is then warm-formed/solidified. Alternatively, an aluminum alloy molten metal containing dispersed particles is disintegrated by atomization, and thereafter the powder containing the dispersed particles of not more than 20 .mu.m in mean particle diameter is warm-formed/solidified by powder forging. Thus, it is possible to obtain an aluminum matrix particle composite alloy in which extra-fine ceramic particles are homogeneously distributed without segregation.

Abstract: A filter membrane and a process for making the filter membrane are provided. The filter membrane comprises a metal substrate having a filtering layer thereon comprising sintered ultra-fine particles of metal or ceramic compounds. The filtering layer preferably has an average pore size of from about 30 nanometers to about 200 nanometers. The filter membranes can withstand pressure drops of up to about 0.6 MPa and are useful for a variety of filtering applications.

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.

Abstract: A semifinished product for electric contact made from a composite material based on silver-tin oxide is described as well as a powder-metallurgical process of making said product. The structure of the semifinished products contains regions which contain no metal oxide or very little metal oxide in alternation with regions which contain the entire metal oxide component or a greatly predominating/share thereof in a fine division.

Abstract: A new silicon carbide material is made following a procedure including hot pressing to provide a finished product having a microstructure with an optimal grain size of less than 7 micrometers. The material exhibits a dominant failure mode of intergranular fracture requiring significant energy for crack propagation. The method of manufacturing is cost-effective by allowing the use of "dirty" raw materials since the process causes impurities to segregate at multi-grain boundary junctions to form isolated pockets of impurities which do not affect the structural integrity of the material. End uses include use as optical and electronic substrate materials.

Abstract: Gas turbine engines employ a variety of abradable liners to decrease the clearance between the rotating components and the surrounding casing. There is normally a trade-off between porosity, (and concomitant permeability) and the abradability of the liner material, such that materials with good abradability are permeable to gas flow--resulting in performance losses. Permeability of porous liners is decreased by infiltrating the liner with a low-viscosity liquid containing a metal or metal oxide. After infiltration, the viscosity of the liquid is substantially increased to prevent its egress from the porous liner. Thereafter, the liner is heated at an elevated temperature to drive off the remaining liquid and provide an oxide which blocks the passages and decreases the permeability of the liner.

Abstract: The invention relates to nano-composite powders of alumina and metal constituted of grains of micronic size. Each grain comprises a compact matrix of alumina of a specific surface area less than 5 m.sup.2 /g, in which are dispersed crystallites of transition metals of alloys of these metals, of sizes less than 50 nm. The powder according to the invention may be produced starting with a precursor comprised of a mixed carboxylic salt of aluminum and one or more transition metals. The powders according to the invention permit producing by sintering cermets of alumina/metal benefitting from greatly improved mechanical and thermo-mechanical properties.

Abstract: A silver base electrical contact material with superior resistance to arc erosion along with improved wear and welding resistance. The contact material consists essentially of 0.5 to 39.9 wt % of nickel, 0.14 to 7.0 wt % of nickel oxides, and balance silver. The material contains not less than 0.4 wt % of nickel responsible for constituting minute nickel and nickel particles which have a particle size of not more than 1 .mu.m and are dispersed in a silver matrix for strengthening the material to give improved wear and welding resistance. The dispersed minute nickel oxide particles are included to stabilize arcing occurring at the time of opening and closing contacts in such a manner as to anchor one end of an arc substantially at any immediately available point over the entire contact surface as soon as the arcing occurs, thereby preventing the arc end from moving violently across or beyond the contact surface and therefore minimizing arc related damages or arc erosion.

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 40% 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.

Abstract: A process for producing porous structures for use in molten carbonate fuel cells in which a powder comprising at least one of a non-alloyed metal powder and a metal oxide powder, and a ceramic oxide powder is mixed, formed into a desired shape and sintered in an oxidizing atmosphere at a temperature between 900.degree. C. and about 1400.degree. C. via reactive oxidation to form a sintered oxide structure, which is then cooled to 700.degree. C. to 1100.degree. C. and treated in a reducing atmosphere to form a metallic structure with the non-reducible oxide dispersed within the metal.

Abstract: A sintering process is described using a glass-ceramic slurry containing an alloy powder or flakes selected from a group of alloys consisting of:______________________________________ Fe--Cr Cu--Ti Fe--Cr--Ni Ag--Ti Cr--Al Nb--Al Ni--Cr Cu--Al Ni--Al Cu--Al--Cr Fe--Al ______________________________________The slurry is molded and later is sintered in a steam atmosphere at a temperature of about 1000.degree. C. to yield a glass-ceramic substrate toughened against crack propagation and useful in the packaging of semi-conductor device chips.

Abstract: A method of forming a ceramic layer, which is compact and rich in adhesion to a metallic body, on the metallic body without adding binders even though said ceramics is hard to be sintered ceramics such as various kinds of non oxide ceramics. Said method comprises a step of placing ceramic powders and/or a mixture of ceramic powders and metallic powders or a mixture of metallic powders and non metallic powders on the metallic body and a step of forming the ceramic layer on the metallic body in a moment by a reaction heat of the Thermit.RTM. reaction under the pressurized condition. In addition, a metallic insert member can be disposed between said metallic body and various kinds of powder placed on said metallic body. Furthermore, the resulting ceramic/metal composite member is subjected to a hot hydrostatic pressing or a hot pressing under high temperatures and high pressures.

Abstract: The present invention relates to a copper-molybdenum composite material having utility in electrical applica- tions and the process for forming the composite material. The composite material is characterized by a continuous copper matrix having a plurality of discrete molybdenum particles embedded therein. The molybdenum particles have an aspect ratio in the range of from about 1:1 to about 4:1 so as to create a thermal path through the matrix from a first side of the composite material to a second side of the composite material. The resulting composite material exhibits improved through-thickness thermal conductivity as a result of the molybdenum particles being within the aforementioned range.

Abstract: Doped tungsten powder, or sintered tungsten bodies formed therefrom, having a fine dispersion of oxide particles of at least one metal from the group zirconium, hafnium, lanthanum, yttrium, and rare earth's are formed by the method of this invention. A mixture of a salt solution comprised of a soluble salt of the metal, and a tungsten blue oxide powder is formed. A hydroxide precipitating solution is admixed with the mixture to form a hydroxide precipitate of the metal on the tungsten blue oxide powder. The tungsten blue oxide powder and hydroxide precipitate are heated in a reducing atmosphere to form the tungsten powder having the dispersion of oxide particles. The doped tungsten powder can be consolidated and sintered to form tungsten bodies having a fine dispersion of the metal oxide.

Abstract: A palladium paste is utilized for forming a palladium film on a ceramic substrate. The paste includes a sinterable palladium powder dispersed in a vaporizable liquid vehicle. The paste also includes minor additions of titanium dioxide powder and a metal titanate powder. A preferred titanate powder is composed of strontium calcium titanate. It is found that the additions remarkably improve adhesion of the palladium film to the substrate.

Abstract: Neutron absorbing refractory B.sub.4 C-Gd and Gd.sub.2 O.sub.3 -Gd cermets, B.sub.4 C-Gd and Gd.sub.2 O.sub.3 -Gd metal-matrix composites, and B.sub.4 C-Gd.sub.2 O.sub.3 ceramic-ceramic composites can be manufactured by applying fundamental thermodynamic and kinetic guidelines as processing principals.Three steps are involved in the fabrication of these new compositions of matter. First, the starting materials are consolidated into a compacted porous green body. Next, the green body is densified using the appropriate method depending on the class of material sought: cermet, metal-matrix composite, or ceramic-ceramic composite. Finally, either during the densification process or by subsequent heat treatment, new phase evolution is obtained via interfacial chemical reactions occurring in the microstructures.The existence of a new phase has been identified in B.sub.4 C-Gd and B.sub.4 C-Gd.sub.2 O.sub.3 composites.

Abstract: The invention relates to a method of preparing sintered shapes, comprising the steps of forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent or alkylalkyleneglycolacetic acylating agent; provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the hydrocarbyl-substituted carboxylic acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and sintering the body. Sintered shapes made from the methods of the present invention have relatively high fired densities and small uniform grain sizes; and low porosity. The reaction products of the present invention help disperse the inorganic powder.