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Oxide strengthened molybdenum-rhenium alloy

United States Patent

August 15, 2000
View the Complete Patent at the US Patent & Trademark Office
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Provided is a method of making an ODS molybdenum-rhenium alloy which includes the steps of: (a) forming a slurry containing molybdenum oxide and a metal salt dispersed in an aqueous medium, the metal salt being selected from nitrates or acetates of lanthanum, cerium or thorium; (b) heating the slurry in the presence of hydrogen to form a molybdenum powder comprising molybdenum and an oxide of the metal salt; (c) mixing rhenium powder with the molybdenum powder to form a molybdenum-rhenium powder; (d) pressing the molybdenum-rhenium powder to form a molybdenum-rhenium compact; (e) sintering the molybdenum-rhenium compact in hydrogen or under a vacuum to form a molybdenum-rhenium ingot; and (f) compacting the molybdenum-rhenium ingot to reduce the cross-sectional area of the molybdenum-rhenium ingot and form a molybdenum-rhenium alloy containing said metal oxide. The present invention also provides an ODS molybdenum-rhenium alloy made by the method. A preferred Mo--Re-ODS alloy contains 7-14 weight % rhenium and 2-4 volume % lanthanum oxide.
Bianco; Robert (Cleveland, OH), Buckman, Jr.; R. William (Pittsburgh, PA)
The United States of America as represented by the United States (Washington, DC)
09/ 143,055
August 28, 1998
RIGHTS OF THE GOVERNMENT The United States Government has rights in this invention pursuant to a contract awarded by the Department of Energy.