Nb-base composites

Details Nb-base composites Nb-base composites

1995-07-06

1998-11-10

Sheehan, John

Metal treatment

Stock

Vanadium, niobum, or tantalum base

420426, 420588, 148442, C22C 2702

Patent

active

058337733

ABSTRACT:
Nb-base alloys that include Ti, Hf, Cr, Al and Si as alloy constituents have a microstructure that includes a metallic solid solution phase and a mixture of intermetallic silicide phases. The metal silicide phases include an M.sub.3 Si silicide, where M comprises Nb, Ti or Hf, and an M.sub.5 (Si, Al).sub.3 silicide, where M comprises Nb, Ti or Hf. These alloys have mechanical properties such as low temperature fracture toughness, high temperature fracture strength, high temperature stress rupture strength and high temperature creep resistance, that meet or exceed those of certain Ni-base superalloys.

REFERENCES:
patent: 3028236 (1962-04-01), Wlodek et al.
patent: 3037858 (1962-06-01), Weisert et al.
patent: 4956144 (1990-09-01), Jackson
patent: 4990308 (1991-02-01), Jackson
patent: 5006307 (1991-04-01), Jackson
patent: 5296309 (1994-03-01), Benz et al.
patent: 5316865 (1994-05-01), Benz et al.
patent: 5366565 (1994-11-01), Jackson

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