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

Abstract

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.

Inventors:
 [1];  [2];  [2]
  1. (Finleyville, PA)
  2. (Pittsburgh, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
872136
Patent Number(s):
5868876
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
AC11-89PN38014
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Bianco, Robert, Buckman, Jr., R. William, and Geller, Clint B. High-strength, creep-resistant molybdenum alloy and process for producing the same. United States: N. p., 1999. Web.
Bianco, Robert, Buckman, Jr., R. William, & Geller, Clint B. High-strength, creep-resistant molybdenum alloy and process for producing the same. United States.
Bianco, Robert, Buckman, Jr., R. William, and Geller, Clint B. Fri . "High-strength, creep-resistant molybdenum alloy and process for producing the same". United States. https://www.osti.gov/servlets/purl/872136.
@article{osti_872136,
title = {High-strength, creep-resistant molybdenum alloy and process for producing the same},
author = {Bianco, Robert and Buckman, Jr., R. William and Geller, Clint B.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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