Patent ID: 8840701
Filing Date: 2014-09-23
Classification: B22F,H01B,H01L,Y02E

Abstract:
1. A method for the manufacture of a multi-element, finely divided, spherical, metal powder containing one or more reactive metal powders selected from a group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), tantalum (Ta), niobium (Nb), vanadium (V), nickel (Ni), cobalt (Co), molybdenum (Mo), manganese (Mn), and iron (Fe) and one or more non-reactive metals selected from a group consisting of tin (Sn), bismuth (Bi), lead (Pb), antimony (Sb), zinc (Zn), germanium (Ge), phosphorus (P), gold (Au), cadmium (Cd), berrylium (Be), and tellurium (Te) comprising the sequential steps: a. forming a solution of a mixture of thermally decomposable reactive metal containing compounds and non-reactive metal containing compounds in a thermally volatilizable solvent; b. forming an aerosol consisting essentially of finely divided droplets of the solution from step A dispersed in a carrier gas, the droplet concentration which is below the concentration where collisions and subsequent coalescence of the droplets results in a 10% reduction in droplet concentration; c. heating the aerosol to an operating temperature above a decomposition temperature of the reactive metal containing compounds and non-reactive metal containing compounds but below a melting point of the resulting multi-metallic alloy by which (1) the solvent is volatilized, (2) the reactive metal containing compounds and the non reactive metal containing compounds are decomposed to form finely, divided particles, (3) the particles form an alloy and are densified; and d. separating the multi-element, finely divided, spherical, metal powder containing at least one reactive metal powder and one non-reactive metal powder from the carrier gas, reaction by-products, and solvent volatilization products.