Nickel-aluminum intermetallic compounds containing dopant elemen

Details Nickel-aluminum intermetallic compounds containing dopant elemen Nickel-aluminum intermetallic compounds containing dopant elemen

1996-01-05

1997-12-16

Simmons, David A.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

148427, 420445, 75249, 75254, C22C 1903

Patent

active

056980060

ABSTRACT:
The improved intermetallic compounds represented by xNiAl+X (x=50.5-63.5), with dopant element X being selected from among Ti, Fe, V, W, Cr, Cu, Mo, Nb, Ta, Hf, Zr and B, are lightweight and have satisfactory oxidation resistance and high-temperature strength and, hence, are useful as structural materials in aerospace (as in space shuttles) and nuclear fields (for use in reprocessing facilities). A representative intermetallic compound having the formula NiAl+x(Mo/Re)+cB, wherein the ratio of Ni:Al is 56.5:43.5, the ratio of Mo:Re is either 1:1 or 1:0.5, x is between 0.1 and 1 at. %, and c is from 0 to 0.2 at. %, is disclosed.

REFERENCES:
patent: 4340425 (1982-07-01), Barrett et al.
patent: 4731221 (1988-03-01), Liu
patent: 5116691 (1992-05-01), Darolia et al.
Ishiyama et al; "The Characteristics of Hot Swaged NiAi Intermetallic Compounds with Ternary Additions Consolidated by HIP Techniques" pp. 323-330 in Synth/Processing of Lightweight Metallic Materials Feb. 1995.

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