Carbon or boron modified titanium silicide

Details Carbon or boron modified titanium silicide Carbon or boron modified titanium silicide

1996-08-15

1997-12-02

Sheehan, John

Alloys or metallic compositions

Titanium base

148421, C22L 1400

Patent

active

056932898

ABSTRACT:
A titanium silicide material based on Ti.sub.5 Si.sub.3 intermetallic compound exhibits substantially improved oxidative stability at elevated temperatures. In particular, carbon is added to a Ti.sub.5 Si.sub.3 base material in an amount (e.g. about 0.3 to about 3.6 weight % C) effective to impart substantially improved oxidative stability at elevated temperatures, such as about 1000.degree. C. Boron is added to a Ti.sub.5 Si.sub.3 base material in an amount (e.g. about 0.3 to about 3.3 weight % B) to this same end.

REFERENCES:
patent: 4639281 (1987-01-01), Sastry et al.
patent: 5366570 (1994-11-01), Mazur et al.
"Contributions to the Nowotny Phases", Powder Metallurgy Bulletin, vol. B, 1957, pp. 25-34-Parthe.
"Lattice Dimensions of Low-Rate Metalloid-Stablized Ti.sub.5 Si.sub.3 " High Temperatures-High Pressures, vol. 6, 1974, pp. 515-517.
Evaluation of A.sub.5 Si.sub.3 Z.sub.x Intermetallics for Use as High Temperatures Structural Materials; published Jul., 1994, 26 pages; Thom, Meyer, Kim and Akinc.
"Electronic Structure and Alloy Chemistry of the Transition Elements", J. Wiley & Sons, 1963, pp. 204-205, Hans Nowotny.
"Metals and Alloys", Acta. Cryst., vol. 10, 1957, pp. 768-769, Parthe.
Massalski (ed), Binary Phase Diagrams, vol. 2, ASM, 1986, pp. 2054, 2056-2057.
Sauthoff, G. Z. Metallkde 81 (1990) 855-861.

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