Abstract: A method for producing a composite element by causing a stream of gaseous rhenium hexafluoride to flow onto a carbon substrate in a chemical vapor deposition reaction. A flow of hydrogen gas causes a reduction of the rhenium hexafluoride to rhenium metal to thereby deposit a uniform layer of rhenium metal onto the surface of the carbon substrate. A fine grain rhenium coating on carbon is produced having an average particle diameter of from about 0.1 to about 25 micrometers. The elements may be used alone or several of them may be bonded together into various articles. Such elements and articles are useful as light weight, high temperature strength, corrosive gas resistant structural elements.

Abstract: A solder paste is made from solder powder having two different alloys. The individual particles in the solder powder consist of a low melting solder coating (115) that surrounds a nucleus (120) of a higher melting solder. The low melting solder is compositionally distinct from the higher melting solder. The particles are suspended in a matrix of a solder paste vehicle, which may also contain a fluxing agent. In one embodiment of the invention, the low melting solder is an alloy of 43% tin, 43% lead and 14% bismuth, and the higher melting solder is an alloy of 52% tin, and 48% bismuth.

Abstract: Ultrafine whiskery or columnar ceramic particles, a method for producing the ultrafine particles, and a sintered article obtained by sintering the ultrafine ceramic particles are disclosed. The ultrafine ceramic particles are produced by thermally melting a matrix alloy of a composition of Al--M.sup.1, wherein M.sup.1 stands for at least one metallic element selected from the group consisting of Cr, Co, and Fe, or Al--M.sup.1 --M.sup.2, wherein M.sup.2 stands for at least one metallic element selected from the group consisting of Au, Cu, Dy, Er, Ga, Ge, Gd, Hf, Ho, Lu, Mn, Mo, Nb, Nd, Ni, Pr, Re, Sb, Sc, Si, Sn, Ta, Tb, Ti, Tm, V, W, Y, Zn, or Zr, in a nitriding atmosphere containing nitrogen and causing the vaporized raw material to react with the nitrogen in the atmosphere.

Abstract: This invention relates to an adhesive composition, comprising: (A) at least one multifunctional epoxy; and (B) the composition derived from (B-1) at least one difunetional epoxy resin and (B-2) at least one compound represented by the formulaR--(G).sub.n (I)wherein in Formula (I): R is an aromatic, alicyclic or heterocyclic group; G is a functional group selected from the group consisting of COOH, OH, SH, NH.sub.2, NHR.sup.1, (NHC(.dbd.NH)).sub.m NH.sub.2, R.sup.2 COOH, R.sup.2 OH, R.sup.2 SH, R.sup.2 NH.sub.2 and R.sup.2 NHR.sup.1, wherein R.sup.1 is a hydrocarbon group, R.sup.2 is an alkylene or alkylidene group and m is a number in the range of 1 to about 4; and n is a number ranging from 3 up to the number of displaceable hydrogens on R; with the proviso that when at least one G is NH.sub.2 or R.sup.2 NH.sub.2, n is a number ranging from 2 up to the number of displaceable hydrogens on R, and when at least one G is (NHC(.dbd.NH)).sub.m NH.sub.

Abstract: An oxygen sensor has alumina porous layer on a surface of a solid electrolyte to cover electrodes and the alumina porous layer is simultaneously baked with the solid electrolyte. The alumina porous layer has baking contraction percentage which is the same range of the solid electrolyte. Alumina powder which is a starting material of the alumina porous layer includes 0.3 to 0.5 .mu.m of a 50% grain size, 0.4 to 1.1 .mu.m of a 70% grain size, and 0.8 to 4.0 .mu.m of a 90% grain size in a grain size distribution of weight integration frequency and further a specific surface area according to a BET method is approximately 8.5 to 11.0 m.sup.2 /g. It is preferable that the baking contraction percentages of the solid electrolyte and alumina porous layer are approximately 16 to 22%.

Abstract: A method wherein one or more metal salts of at least one iron group metal containing organic groups are dissolved and complex bound in at least one polar solvent with at least one complex former comprising functional groups in the form of OH or NR.sub.3, (RH.dbd.H or alkyl). Hard constituent powder and, optionally, a soluble carbon source are added to the solution. The solvent is evaporated and the remaining powder is heat treated in an inert and/or reducing atmosphere. As a result, coated hard constituent powder is obtained which after addition of a pressing agent can be compacted and sintered according to standard practice to a body containing hard constituents in a binder phase.

Abstract: A method for producing microcomposite powders for use in superconducting and non-superconducting applications.

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.

Abstract: A structural member is produced using starting powder consisting of composite particulates each containing AlN grain within its surface covered by an Al layer of a single crystal structure, and Al alloy particulates of a single crystal structure, and then by sintering the Al layers of the composite particulates with the Al alloy particulates. The Al layers and the Al alloy particulates of the single crystal structure have no dislocation fault, crystal grain boundary. etc., produced therein, and for this reason, they have a low chemical activity. Therefore, the Al layers and the like have a characteristic that they are extremely difficult to oxidize. This ensures that the Al layers and the Al alloy particulates can be reliably sintered to achieve the densification of the resulting structural member.

Abstract: A thermal spray powder is formed as a mixture of tungsten carbide granules and chromium carbide granules. The tungsten carbide granules each consists essentially of tungsten carbide bonded with cobalt, and the chromium carbide granules each consists essentially of chromium carbide bonded with nickel-chromium alloy. The powder may be asmixed with self-fluxing alloy powder. The powder preferably is sprayed with a high velocity oxygen-fuel thermal spray gun.

Abstract: Composite thermal spray powders having a core to which fine particles of exothermically reacting aluminum or aluminum alloy and iron or copper fine particles are bonded. The thermal spray powders are useful in producing coatings having both high adhesive bond strength and good machinability.

Abstract: Mechanical plating method for forming a zinc alloy film by ejecting powder onto a surface. Ejection powder is made by mixing iron or iron alloy nuclei with zinc alloy melt, cooling to form a solidified alloy, and crushing. The ejection powder is then heat treated between 300.degree. C. and 700.degree. C. to adjust the Vicker's hardness of the zinc alloy to between 60 and 370.

Abstract: A high capacity, long cycle life positive electrode for use in an alkaline rechargeable electrochemical cell comprising: a solid solution nickel hydroxide material having a multiphase structure that comprises at least one polycrystalline .gamma.-phase including a polycrystalline .gamma.-phase unit cell comprising spacedly disposed plates with at least one chemical modifier incorporated around the plates, the plates having a range of stable intersheet distances corresponding to a 2.sup.+ oxidation state and a 3.5.sup.+, or greater, oxidation state; and at least one compositional modifier incorporated into the solid solution nickel hydroxide material to promote the multiphase structure.

Abstract: Improved iron-base powder composition for use in powder metallurgy comprising an iron-base powder to the surfaces of the particles of which either an Fe-Ni powder alloy containing 5-70 wt % Ni or an Fe-Mo alloy powder containing 20-70 wt % Mo or both alloy powders is adhered means of a binder or binders. This iron-base powder composition can be obtained by a process in which either an Fe-Ni alloy powder containing 5-70 wt % Ni or an Fe-Mo alloy powder containing 20-70 wt % Mo or both alloy powders is adhered by thermally melting a binder. The thus obtained iron-base powder composition can be shaped and sintered to produce an iron-base sintered material. The iron-base powder composition is suitable for use in the powder metallurgical manufacture of iron-base sintered parts that require high density, high strength, toughness, wear resistance and good dimensional change stability.

Abstract: Non-amalgamated zinc alloy powder is prepared by admixing zinc alloy powder with a predetermined amount of indium and heating the resulting mixture at temperature ranging from 160.degree. C. to 200.degree. C. in inert gas atmosphere.

Abstract: This invention relates to a powder substantially of dental metal, which powder is suitable for the manufacture of a dental restoration such as a crown or a bridge, comprising a substructure of dental metal and a fired on coating of a dental ceramic material. The powder comprises a core substantially of a dental metal, which core is coated with one or more layers substantially of metal which protect the dental metal of the core during sintering against oxidation and/or reduce the temperature at which the powder is sintered.The invention also relates to a process for the manufacture of a dental restoration such as a crown or a bridge, comprising a substructure of a dental metal and a fired on coating of a dental ceramic material.

Abstract: A powdered aluminum composition is mixed with lithium dispersed in an inert, non-water absorbent, liquid medium to produce a substantially homogenous admixture that is heated to melt the lithium and vaporize the liquid medium to thereby obtain a decovered powdered alloy comprising aluminum and lithium. The liquid medium has major and minor liquid constituents, wherein the major liquid constituent has a boiling point below the melting point of lithium and the minor liquid constituent has a boiling point above the melting point of lithium but below the melting point of the alloy being produced.

Abstract: A cast product made from metallic material and ceramic material with the ceramic material being an insert, comprises an aggregated body of capsule particles, the capsule particle including a ceramic particle coated with metallic particles, and metallic material cast over the aggregated body.

Abstract: This invention relates to a process for producing a rare earth-containing powder comprising crushing a rare earth-containing alloy in water, drying the crushed alloy material at a temperature below the phase transformation temperature of the material, and treating the crushed alloy material with a passivating gas at a temperature from the ambient temperature to a temperature below the phase transformation temperature of the material. Rare earth-containing alloys suitable for use in producing magnets utilizing the powder metallurgy technique, such as Nd-Fe-B and Sm-Co alloys, can be used. The passivating gas can be nitrogen, carbon dioxide or a combination of nitrogen and carbon dioxide. If nitrogen is used as the passivating gas, the resultant powder has a nitrogen surface concentration of from about 0.4 to about 26.8 atomic percent. Moreover, if carbon dioxide is used as the passivating gas, the resultant powder has a carbon surface concentration of from about 0.02 to about 15 atomic percent.

Abstract: Coated reinforcement material for metal matrix composites comprising a carbon or silicon-containing reinforcement having a coating of the general formula:A.sub.100-x M.sub.xwherein A is at least one of Y, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; M is at least one of Mo, W or Re; and x is from about 10 to about 90.

Abstract: Disclosed herein are acicular magnetic iron based alloy particles for magnetic recording, containing 1.5 to 10 mol % of B based on Fe (calculated as B) and 1.5 to 10 mol % of Co based on Fe (calculated as Co) in the vicinity of the surfaces of said particles and having a saturation magnetization of not less than 125 emu/g and an S.F.D. value of not more than 0.50, and a process for producing the same.

Abstract: A partially hardened sintered body such as a rocker arm comprises powder forming a main body and a capsule-like powder composite disposed adjacent to the powder and composed of core particles made of a material harder than the powder and covering particles covering the core particles and made of the same material as the powder. The powder and the capsule-like powder composite are solidified into the partially hardened sintered body.

Abstract: Conductive metal powders having high conductivity with minimized silver migration are characterized in that an average composition is represented by Ag.sub.x M.sub.1-x (wherein M is at least one metal selected from Ni, Co, Cu and Fe; 0.01.ltoreq.x.ltoreq.0.4) and has a region wherein a silver concentration progressively increases on moving from the inner part toward the surface. The conductive metal powders, which are useful as leads, electrodes and shielding from electromagnetic interference are prepared by solidifying rapidly a molten metal having the specific composition.

Abstract: Packages prepared from a flexible static charge-dissipating structure comprising a substrate film, a coating layer of heat sealable thermoplastic matrix containing micron sized particles of a silica containing material surface coated with antimony-containing tin oxide crystallites, and optionally a thin layer of metal, provide excellent static charge protection to sensitive electronic components.

Abstract: A body formed of a lead-tin solder alloy is pretreated to deposit palladium thereon prior to soldering to a metallic substrate. It is found that the palladium deposit enhances wetting of the substrate by the solder liquid during reflow and thereby, upon cooling, produces a strong metallurgical bond. In a preferred embodiment, lead-tin solder balls are pretreated by applying tin-palladium colloidal particles and dissociating the particles to form a discontinuous metallic palladium deposit.

Abstract: A rare-earth metal series alloy for storage of hydrogen is represented by a general formula of Rem.sub.1 Ni.sub.w Al.sub.x Fe.sub.y M.sub.z as an atomic ratio (wherein Rem is at least one rare earth element such as Mischmetal, M is at least one of Cu, Nb, Si and Zr, and 2.5<w<5.5, 0<x<2.0, 0<y<2.0, 0<z<2.0 and 4.0.ltoreq.w+x+y+z.ltoreq.6.0). Further, the alloy is coated with a film of at least one of Pd, Cu and Ni having a thickness of 100-1000 .ANG..

Abstract: A non-sintered permanent magnet is formed by a cold compacting technique or by resin bonding using particles of a stoichiometric alloy (e.g. R.sub.2 Fe.sub.14 B where R is at least one rare earth and/or yttrium, particularly La, Ce, Pr, ND or Y or a mixture thereof) which have been coated with a reaction product of the alloy or a non-magnetic metal such as Sn, Ga, Zn, Al, or Cu. The use of a stoichiometric alloy avoids the presence of a reactive grain boundary phase normally present in non-stoichiometric alloys.

Abstract: A feedstock for metal injection molding comprises a reactive metal powder selected from the group consisting of aluminum, magnesium and titanium coated with a less reactive metal selected from the group consisting of cobalt, copper, iron, nickel, tin and zinc dispersed in a binder.

Abstract: A composite thermal spray powder for abradable coatings is formed as homogeneously agglomerated particles. Each agglomerated particle consists of pluralities of subparticles of boron nitride and subparticles of aluminum or aluminum alloy bonded with an organic binder.

Abstract: A molybdenum metal powder having an outer shell coating of MoO.sub.2 is useful in flame spray or plasma spray processes and is prepared by partially oxidizing molybdenum powder in a carbon dioxide atmosphere at temperatures of up to 1200.degree. C.

Abstract: A metal fuel for producing power for propulsion is disclosed. The fuel is made up of a metal core, a metal barrier and an oxidizer layer. The combination of materials disclosed provides a means for melting the metal core so that it can be oxidized in an exothermic reaction to produce power. The metal fuel may also be stabilized with respect to auto-ignition by adding a binder layer. A method for producing the metal fuel is also described herein.

Abstract: Powders for producing hard materials in short reaction times are provided, especially for use in electric arc spraying. The powders are produced by bonding metallic and non-metallic starting materials to one another by spray-drying or agglomeration, using an organic or inorganic binder. The metallic starting materials are selected from the group consisting of Al, Ni, Ti, Cr, Mo, V, Zr and Ta, whereas the non-metallic starting materials are selected from the group consisting of Cr.sub.3 C.sub.2, WC, C, SiC, TiB.sub.2, CrB.sub.2, B.sub.4 C, TiC, VC, TiN and Si.sub.3 N.sub.4. In this manner, the metallic and non-metallic starting materials react exothermically during electric arc spraying to produce a hard substance.

Abstract: This invention relates to a rapidly solidified product comprising a second phase in both a stable particulate form and a metastable flake form dispersed in an intermetallic matrix.

Abstract: An alloyed steel powder for metallurgy is provided with a water-atomized alloyed steel powder wherein an alloy component, an oxide of which is difficult to be reduced with hydrogen in the production of the powder, has been prealloyed in a composition range not exerting a bad influence upon compressibility of the steel powder, and an alloy component or components easier to be reduced with hydrogen than the above alloy component, the said easily reducible alloy component or components being partially diffused and adhered in a powdered form to the particle surfaces of the water-atomized alloyed steel powder.The composite powder of the invention has a coating layer of at least one element selected from nickel, copper, molybdenum and tungsten which is partially diffused and adhered in a powder form to the surface of a chromium containing prealloyed steel powder.

Abstract: A compound or composite powder which includes metallic or ceramic whiskers embedded in a metallic or ceramic matrix as host material, the whiskers have a length between 5.times.10.sup.-6 m and 2.times.10.sup.-4 m and diameters between 2.times.10.sup.-7 m and 1.times.10.sup.-5 m, and are embedded in the matrix with a volume proportion of whisker content between 1 to 50% (by volume), the reference being to a pore-free compacted compound/composite material; the whiskers being made of SiC, Si.sub.-3 N.sub.-4, Al.sub.-2 O.sub.-3 or ZrO.sub.-2 and are embedded in a ceramic matrix being Al.sub.-2 O.sub.-3, Al.sub.-2 O.sub.-3 +from 5 to 40% ZrO.sub.-2 +from 0 to 5% Y.sub.-2 O.sub.-3 or ZrO.sub.-2 with 3 to 15% Y.sub.-2 O.sub.-3 or Si-nitride or Si-carbide. Alternatively the whiskers are made of Si.sub.-3 N.sub.-4, Al.sub.-2 O.sub.-3, ZrO.sub.-2 or W and the matrix is made of W, Mo, Fe, Ni, Co, Cu or an alloy thereof.

Abstract: The metal bonded diamond wheel of the invention has a sintered body of a mixture of a diamond powder and a bonding metal powder. The particles of the bonding metal powder or, preferably, particles of both of the diamond powder and the bonding metal powder are provided, prior to powder metallurgical sintering, with a coating layer of iron, cobalt or nickel, in a thickness of 0.5 to 15 .mu.m. When sintered under adequate conditions, the sintered body has pores in a porosity of 10 to 25% and exhibits greatly improved grinding performance relative to the durability in grinding works and sharpness of grinding with a decreased resistance of grinding.

Abstract: Methods for manufacturing compressible and sinterable metal powders are provided by this invention which include contacting core metal particles with a sol of a precursor of a metal. The sol has a viscosity of from about 10-10.sup.5 centipoise and comprises at least 1.0 weight percent of the precursor in a liquid medium. The final coating is produced by removing the liquid from the sol and then converting the precursor to form a substantially uniform layer of a Cu-Ni-Mo alloy on the surfaces of the soft iron or steel core metal particles.

Abstract: The cathode-forming method involves incorporating cobalt into a nickel plaque so that the exposed surfaces and the pores of the nickel plaque are uniformly covered with cobalt. The plaque is then treated to form nickel hydroxide in the pores and on the surfaces thereof. The cobalt is thus diposed at the interfacial boundary of the nickel plaque and nickel hydroxide so as to reduce the impedance and enhance charge conduction of the cathode. The mode of incorporation can vary. Thus, the sintered nickel plaque can be soaked in an aqueous solution of a water-soluble salt of cobalt, such as cobalt nitrate, then dried and resintered. Another mode involves dispersing a water-soluble cobalt salt in an aqueous slurry of nickel particles and water-soluble binder for the particles. The nickel particles are thus uniformly covered with the dissolved cobalt salt and then are compacted into a plaque. The plaque is dried and finally sintered.

Abstract: Ferromagnetic metallic particles having incorporated into the surface a rare earth element are employed to make magnetic recording elements. These particles are obtained from non-magnetic particle precursors by treating with a rare earth salt in an aqueous solution.

Abstract: Provided herein are high-strength high-toughness sintered alloy steel and composite alloy steel powder useful for the production thereof. The sintered alloy steel contains, as the alloy components in the final product, Ni, Mo, and/or W, and C, if necessary, said alloy being composed of 0.50-3.50 wt % of Ni, 0.65-3.50 wt % of Mo+1/2W, (and 0.3-0.8 wt % of C, if necessary), and the remainder of Fe and inevitable impurities, and has a density higher than 7.0 g/cm.sup.3 and a tensile strength higher than 130 kgf/mm.sup.2 after quenching and tempering. The composite alloy steel powder is composed of iron powder particles and powdery alloy components attached by diffusion to part of the surface of the iron powder particles, with the content of Ni and the content of Mo+1/2W in the steel powder of particle diameter smaller than 45 .infin.m being in the range of 2.0-4.2 times the average content in the entire steel powder.

Abstract: The present invention provides a process for the electroless plating of easily reducible metals onto ultrafine, usually inert, particles. Such plating is achieved through careful and accurate control of such parameters as the feed rates of the various solutions, the control of pH of the solution, the temperature, pressure and the rate of agitation of the solution in which the plating is taking place. The plated ultrafine composite particles and the powders made from the particles produced by the process are also a part of the invention. There is also provided a metal article of manufacture consisting of a metla such as copper, silver, gold, ruthenium, rhodium, palladium, osmium and platinum with a plurality of shperical shaped ultrafine particles with a diameter of less than about 10 microns dispersed substantially evenly through the metal article.

Abstract: A metal-metal matrix composite magnet including a magnetic material such as a neodymium-iron-boron magnetic phase bonded by a metal matrix, preferably copper an a method of making the magnet which involves plating a thin metal layer, for example, a layer having a thickness of less than 1000 angstrom average, from a magnetic phase, pressing the powder, with or without magnetic alignment, into the desired shape and then sintering the pressed powder at a temperature below about 400.degree. C.

Abstract: A high strength, light weight stabilized skin structure having spaced skin sheets and a plurality of hollow metal spheres filling the space between the skins. The spheres and skins are bonded together, resulting in a unitary structure. The spheres typically have outside diameters of from about 0.005 to 0.5 inch, with tall thicknesses of about 0.0005 to 0.005 inch. Spheres of different sizes may be used, with smaller or heavier wall thickness spheres in high load areas, such as insert attachment points, and larger spheres in lightly loaded areas. The spheres preferably have a surface coating of a brazing material and are bonded together and to the skins by furnace brazing.

Abstract: A ferromagnetic metal powder comprises a ferromagnetic metal particle composed mainly of iron, a silicon compound layer formed on the surface of the ferromagnetic metal particle in such an amount that the amount of silicon is 0.1 to 1% by weight based on iron in the ferromagnetic metal particle, and a layer containing a nonferrous transition metal element compound in an amount of from 2 to 15% by weight based on the weight of iron in said ferromagnetic particle which is formed on the silicon compound layer.

Abstract: The invention relates to a printed wiring board (7) which includes at least one carbon resistor (3) formed across terminals (2a, 2b) of printed wiring circuit (2). A heat dissipating film layer (4) is formed at least on the carbon resistor (3). Thus, heat produced in the resistor (3) is effectively dissipated.

Abstract: A dental-filling material with hardnesses exceeding 100 HV for gold-condensation is prepared from a gold-alloy powder of which the alloying components are metals resulting in hardening gold alloys and which are simultaneously soluble in nitric acid. A rough, pure gold layer on the surface of the powder particles is obtained by treatment with nitric acid.

Abstract: A composite material has portions of a first material such as a metal or ceramic having coatings of a metal material thereon disposed in a metal matrix material and having a diffusion-bonds between the coating and matrix materials securing the portions of the first material at selected locations in the composite material.

Abstract: A hot-dip galvanized coating for improved resistance welding of galvanized steel parts or sheets includes particles of a metal phosphide, and preferably ferrophosphorus particles, having a particle size of from about 0.1 to about 30 microns such particles being included in the galvanized coating while the zinc is still molten. The coating can also include up to about 40% by weight of the metal phosphide of an additional metal such as nickel, tin, aluminum or lead, which can be incorporated in the coating as discrete particles or deposited onto the surface of the metal phosphide particles.The advantages of the present invention include a significant reduction in welding current and an increase in electrode life, as well as simplified application of the coating by incorporating the metal phosphide particles directly into existing coating lines.

Abstract: Metallic coated particles are disclosed which comprise a core consisting essentially of a material selected from the group consisting of metals, metal alloys, ceramics, ceramic glasses, and a coating relatively uniformly distributed on the core. The coating consists essentially of a relatively ductile and/or malleable metallic material selected from the group consisting of metals and metal alloys. The process for producing the coated particles involves increasing the aspect ratio of the ductile and/or malleable material, and mechanically applying it to a powder material which is to be the core of the particles.

Abstract: A nickel particle plating system in which a multiplicity of minute nickel spheres are provided with a heavy copper coating and then a comparatively thin silver coating. The copper coating is at least about 20 percent by weight of the shpere, and the silver coating has a maximum thickness of about 15 percent of the sphere diameter. The coated spheres are deposited in a nonconductive matrix to form an electroconductive body in which the spheres may be placed along conductive paths.