Free flowing powder and process for producing it

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

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75 5BB, 427215, 427216, 427423, 428389, 428403, C23B 300, C23B 304

Patent

active

039739481

ABSTRACT:
Free flowing powders, such as for flame spray applications, are produced by spray drying a slurry of finely divided particles of the metal in a solvent-binder system to produce agglomerates, wherein the binder is a soluble compound of the metal. These agglomerates possess sufficient green strength to be screened and exhibit higher apparent densities than comparable powders agglomerated with conventional organic binders. When these powders are heated in a reducing atmosphere above the decomposition temperature of the binder, the binder converts to base metal and harmless by-products, such as nitrogen and water thus avoiding contamination of the product, equipment and work area usually associated with conventional organic binders.

REFERENCES:
patent: 2666696 (1954-01-01), Fredenburgh
patent: 3153585 (1964-10-01), Laferty, Jr.
patent: 3223523 (1965-12-01), Adler
patent: 3322515 (1967-05-01), Dittrich et al.
patent: 3436248 (1969-04-01), Dittrich et al.
patent: 3617358 (1971-11-01), Dittrich
patent: 3890137 (1975-06-01), Beyer et al.

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