PURPOSE: To obtain an inter-high-melting-metallic compound-base alloy represented by Nb3Al and excellent in formability and sintering characteristics and further to obtain a homogeneous inter-high-melting-metallic compound-base alloy containing the third high-melting element and excellent in strength at high temp. and toughness.
CONSTITUTION: In a method for producing an (inter-high-melting-metallic compound Nb3Al)-base alloy, mechanical deformation is applied to a Nb3Al intermetallic compound having A15 type crystal structure to form a powder of nonequilibrium supersaturated solid solution with bcc type crystal structure by ≥50% by volume ratio. The resulting bcc nonequilibrium supersaturated solid solution powder is compacted at a temp. not higher than the temp., 700°C, at which transformation into A15 type crystal structure is brought about and is then heated at ≥700°C to undergo sintering and also transformation of a sintered compact into a stable structure. By this method. the (inter-high-melting- metallic compound Nb3Al)-base alloy composed essentially of A15 phase can be produced.
KONDO YASUO
YASUDA TAKESHI
KODAMA HIDEYO
