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

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872136

Bianco, Robert ^[1]; Geller, Clint B ^[2]

---

1. Finleyville, PA
2. Pittsburgh, PA

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.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (United States)
• DOE Contract Number: AC11-89PN38014
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5868876
• OSTI ID: 872136
• Country of Publication: United States
• Language: English

Related Subjects

high-strength
creep-resistant
molybdenum
alloy
process
producing
wet-doping
oxide-dispersion
strengthened
disclosed
adding
nitrate
acetate
salts
lanthanum
cerium
thorium
yttrium
oxide
produce
slurry
heating
hydrogen
atmosphere
powder
mixing
cold
isostatically
pressing
sintering
thermomechanically
processing
swaging
extruding
drawing
product
produced
contains
2-4
volume
1-4
weight
strength
improved
creep-resistance
temperatures
55t
hydrogen atmosphere
molybdenum oxide
acetate salts
isostatically pressing
cold drawing
molybdenum alloy
cold isostatic
dispersion strengthened
improved creep
doping process
creep-resistant molybdenum
/148/75/419/