Abstract: A novel silver powder composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occlusions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of fatty-acid silver reaction product of the surface of the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.

Abstract: A flame spray powder comprising particles having a core of nickel, iron, copper, cobalt or alloys thereof coated with a binder containing discrete particles of aluminum and substantially pure nickel. The core material should be present in amounts of 70-98, and preferably 80-94, weight percent of the total metal content of the powder. The core particles should range in size between -60 mesh and +3 microns, and preferably -100 mesh and +400 mesh. The core material is most preferably nickel, and the coating may, in addition to the aluminum and nickel, contain molybdenum.

Abstract: A process for preparing metal having a substantially uniform dispersion of hard filler particles. The process includes the steps of: admixing particles of a first metallic component with oxide particles having a negative free energy of formation at 1000.degree. C. of at least as great as that of aluminum oxide, and with a dissimilar second metallic component; and of milling for a period of time sufficient to produce powder characterized by a substantially uniform dispersion of hard filler particles and heterogeneous agglomerations of at least two metallic components. The first metallic component is from the group consisting of nickel, cobalt, iron and alloys thereof. Both the first and the second metallic component have an average particle size of less than 10 microns.

Abstract: A powder metallurgy compact and a sintered product is provided from high performance alloys difficult to compact and/or sinter. The green compact comprises a mixture of the alloy powder, which, as a result of blending and extruding is coated with a film of a solid organic binder, and consolidated to discrete bodies of an intermediate density. The green compacts are sintered to produce a final solid product.

Abstract: A microsphere of solder having a metallic core, in which the thickness of the solder coating of the microsphere is more than 20 microns, can be produced by a process comprising preparing a sheet having a plurality of hollows provided all over the sheet, placing a spherical grain of a metal together with at least one grain of solder in each of said hollows, the metallic grain having wettability for solder, then heating the grains in the hollow in the presence of a flux to coat the metallic grain with the solder, and recovering a spherical solder bead having a metallic core.

Abstract: A mechanical mixture of selected powders is subjected to compressive forces to define a pre-compact, the pre-compact then being subjected to liquid phase sintering for producing a raw alloy steel product which is more economical and has enhanced physical properties, particularly tensile strength as compared to sintered compacts produced by the prior art to date. The improvement in physical properties and processing technique results principally from the use of a mechanical mixture consisting of a base iron powder and a coated alloyed additive powder having selected alloying ingredients (such as manganese, nickel, molybdenum, in an iron-carbon system); the particles of the alloyed powder have a thin flash coating of a low melting metal, such as copper, to control carbon diffusion into the base iron powder during liquid phase sintering.

Abstract: A composite reinforced with polycrystalline alumina fibers in a matrix of an aluminum alloy containing 0.5-5.5% by weight of the matrix of lithium is prepared by infiltrating alumina fibers with a molten alloy containing aluminum and 1-8% by weight of lithium for a time sufficient to form a reaction sheath on the fibers of a thickness less than about 15% of the total fiber diameter.

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.

Abstract: A flame spray material in the form of a composite comprising (1) as a first component an alloy containing at least about 40% of its weight of at least one of nickel and cobalt, and about 1 to 6% by weight of boron, and (2) aluminum powder as a second component, the first component being present in about 66 to 99% by weight of the composite. The material, desirably blended with about 10% of an aluminum-molybdenum-coated nickel core powder, produces self-bonded wear resistant coatings which can be ground without cracking.

Abstract: The flame resistance of wool textiles is increased by sequential application of N,N',N"-triallylphosphoramide and bromine.