Rhenium tantalum metal alloy

Details Rhenium tantalum metal alloy Rhenium tantalum metal alloy

2005-06-07

2005-06-07

Zimmerman, John J. (Department: 1775)

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

C428S457000, C419S028000, C419S029000, C419S032000, C420S433000

Reexamination Certificate

active

06902809

ABSTRACT:
The present invention provides a method for preparing a rhenium-tantalum alloy with improved strength and ductility characteristics. The method includes mixing powders of rhenium and tantalum with a weight ration of approximately 97% rhenium to approximately 3% tantalum. The powdered blend is then compressed to a green state. The green compress of rhenium and tantalum is then sintered such that tantalum goes into solid solution with rhenium. The sintered material is then cold rolled. The cold rolling disperses oxides away from concentrations in the alloy grain boundaries. If desired, the alloy may then be annealed. The result is a rhenium-tantalum alloy that displays improved high temperature strength and ductility over pure rhenium materials. The present alloy is particularly suited to fabrication of rocketry components such as valve bodies, poppets, seats, and nozzles.

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