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High-strength, creep-resistant molybdenum alloy and process for producing the same

United States Patent

5,868,876
February 9, 1999
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A wet-doping process for producing an oxide-dispersion strengthened (ODS), creep-resistant molybdenum alloy is disclosed. The alloy is made by adding nitrate or acetate salts of lanthanum, cerium, thorium, or yttrium to molybdenum oxide to produce a slurry, heating the slurry in a hydrogen atmosphere to produce a powder, mixing and cold isostatically pressing the powder, sintering in a hydrogen atmosphere, and thermomechanically processing (swaging, extruding, cold drawing) the product. The ODS molybdenum alloy produced by the process contains 2-4% by volume (.about.1-4% by weight) of an oxide of lanthanum, cerium, thorium, or yttrium. The alloy has high strength and improved creep-resistance at temperatures greater than 0.55T.sub.m of molybdenum.
Bianco; Robert (Finleyville, PA), Buckman, Jr.; R. William (Pittsburgh, PA), Geller; Clint B. (Pittsburgh, PA)
The United States of America as represented by the United States Department of Energy (Washington, DC)
08/ 856,503
May 15, 1997
RIGHTS OF THE GOVERNMENT The United States Government has rights in this invention pursuant to a contract awarded by the U.S. Department of Energy.