Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Patent
1987-08-12
1988-07-19
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
75 05C, 75249, B22F 100
Patent
active
047584050
ABSTRACT:
A green pressed article of high strength and of low relative density, formed from a heat-resistant aluminum alloy of the Al/Fe/X or Al/Cr/X type, where X is Ti, Ce, Zr, Hf, V, Nb, Cr, Mo or W, is produced by a powder-metallurgical process, wherein an alloy melt is atomized to form fine particles by means of an inert gas jet, with which 0.5 to 2% by volume of oxygen is admixed, and the powder produced in this manner is compactd. Nitrogen, argon or helium can be employed as inert gas. The green pressed article is preferably formed from a small proportion of coarser, non-spherical particles and a greater proportion of finer, spherical particles.
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BBC Brown Boveri AG
Lechert Jr. Stephen J.
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