Process for producing finely divided spherical metal powders containing an iron group metal and a readily oxidizable metal
First Claim
1. A process comprising:
- (a) forming an aqueous solution containing at least one metal from the iron group metal,(b) forming from said solution a reducible solid material selected from salts of said iron group metal, oxides of said iron group metal, hydroxides of said iron group metal and mixtures thereof,(c) reducing said material to form metallic powder particles,(d) entraining at least a portion of said powder particle in a carrier gas,(e) feeding said entrained particles and said carrier gas into a high temperature zone and maintaining said particles in said zone for a sufficient time to melt at least about 50% by weight of said particles, and to form droplets therefrom and(f) cooling said droplets to form metal particles having essentially a spherical shape,(g) combining said spherical shaped particles with finely divided particles of at least one easily oxidizable metal in a non-oxidizing atmosphere to form an agglomerate and,(h) subjecting said agglomerates to a sufficient temperature in a non-oxidizing atmosphere to form an alloy.
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Accused Products
Abstract
Alloys of a first group of metals containing at least one iron group metal and one or more easily oxidizable metals can be formed by forming an aqueous solution of the first group of metals, forming solids containing the metals from the solution, reducing the solids to a metallic powder, converting the metallic powder to metallic alloy spherical powders, agglomeration the spherical powder with one or more easily oxidizable metals in a non-oxidizing atmosphere, thereafter the agglomerates are subjected to a sufficient temperatures under non-oxidizing conditions to form an alloy. Alternatively, the easily oxidizable metals can be agglomerated with the solids containing the iron group metal prior to converting the agglomerates to a spherical alloy powder.
44 Citations
16 Claims
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1. A process comprising:
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(a) forming an aqueous solution containing at least one metal from the iron group metal, (b) forming from said solution a reducible solid material selected from salts of said iron group metal, oxides of said iron group metal, hydroxides of said iron group metal and mixtures thereof, (c) reducing said material to form metallic powder particles, (d) entraining at least a portion of said powder particle in a carrier gas, (e) feeding said entrained particles and said carrier gas into a high temperature zone and maintaining said particles in said zone for a sufficient time to melt at least about 50% by weight of said particles, and to form droplets therefrom and (f) cooling said droplets to form metal particles having essentially a spherical shape, (g) combining said spherical shaped particles with finely divided particles of at least one easily oxidizable metal in a non-oxidizing atmosphere to form an agglomerate and, (h) subjecting said agglomerates to a sufficient temperature in a non-oxidizing atmosphere to form an alloy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process comprising:
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(a) forming an aqueous solution containing at least one metal from the iron group metal, (b) forming from said solution a reducible solid material selected from salts of said iron group metal, oxides of said iron group metal, hydroxides of said iron group metal and mixtures thereof, (c) reducing said material to form metallic powder particles, (d) combining said metallic powder particles with finely divided particles of at least one easily oxidizable metal in a non-oxidizing atmosphere to form agglomerates therefrom and, (e) subjecting said agglomerates to a sufficient temperature in a non-oxidizing atmosphere to form an alloy. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification