Metal treatment – Stock – Chromium – molybdenum – or tungsten base
Patent
1996-08-15
1998-07-14
Sheehan, John
Metal treatment
Stock
Chromium, molybdenum, or tungsten base
148421, 420417, 420429, C22C 2704
Patent
active
057798230
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.
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Sauthoff, G. Z. Metallkole 81 (1990) 855-861.
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.
"Contributions To The Nowotny Phases", Powder Metallurgy Bulletin, vol. 13, 1957, pp. 25-34-Parthe.
"Lattice Dimensions of Low-Rate Metalloid-Staslized Ti.sub.5 Si.sub.3 " High Temperatures High Pressures, vol. 6, 1974, pp. 515-517.
"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.
Akinc Mufit
Thom Andrew J.
Iowa State University & Research Foundation, Inc.
Sheehan John
Timmer Edward J.
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