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US 5,683,524 AGranted
High temperature melting molybdenum-chromium-silicon alloys
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsP. R. Subramanian, Madan G. Mendiratta, Dennis M. Dimiduk
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Abstract
High temperature melting molybdenum-chromium-silicon alloys having good high temperature strength and specific stiffness are described which comprise Mo--Cr--Si alloys in the Mo-rich (Mo, Cr)--(Mo, Cr).sub.3 Si two-phase field.
Claims4
A method for preparing a high temperature melting molybdenum-chromium-silicon alloy having good low temperature damage resistance and high temperature strength and creep resistance to about 1500.degree. C., comprising the steps of:
- (a) preparing an alloy having a composition of molybdenum, chromium and silicon in the ranges of 25 to 40 atom percent Cr, 50 to 60 atom percent Mo and 13 to 16 atom percent Si;
- and
- (b) annealing said alloy between 1200.degree. C. and 1500.degree. C. to produce within said alloy a ductile refractory phase of a solid solution of Mo and Cr containing 2.4 to 2.8 atomic percent Si and an intermetallic matrix of (Mo,Cr).sub.3 Si, and wherein said refractory phase is substantially uniformly distributed within said intermetallic matrix.
Dependencies are inferred from the claim text.