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Title: Packed bed carburization of tantalum and tantalum alloy

Abstract

Packed bed carburization of a tantalum or tantalum alloy object. A method for producing corrosion-resistant tantalum or tantalum alloy objects is described. The method includes the steps of placing the object in contact with a carburizing pack, heating the packed object in vacuum furnace to a temperature whereby carbon from the pack diffuses into the object forming grains with tantalum carbide along the grain boundaries, and etching the surface of the carburized object. This latter step removes tantalum carbides from the surface of the carburized tantalum object while leaving the tantalum carbide along the grain boundaries.

Inventors:
 [1];  [1];  [2]
+ Show Inventor Affiliations
  1. Espanola, NM
  2. Medanales, NM
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
OSTI Identifier:
872353
Patent Number(s):
5916377
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
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DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
packed; bed; carburization; tantalum; alloy; method; producing; corrosion-resistant; described; steps; placing; contact; carburizing; pack; heating; vacuum; furnace; temperature; whereby; carbon; diffuses; forming; grains; carbide; grain; boundaries; etching; surface; carburized; latter; step; removes; carbides; leaving; vacuum furnace; tantalum alloy; packed bed; grain boundaries; bed carburization; /148/216/

Citation Formats

Lopez, Peter C, Rodriguez, Patrick J, and Pereyra, Ramiro A. Packed bed carburization of tantalum and tantalum alloy. United States: N. p., 1999. Web.
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Lopez, Peter C, Rodriguez, Patrick J, & Pereyra, Ramiro A. Packed bed carburization of tantalum and tantalum alloy. United States.
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Lopez, Peter C, Rodriguez, Patrick J, and Pereyra, Ramiro A. Fri . "Packed bed carburization of tantalum and tantalum alloy". United States. https://www.osti.gov/servlets/purl/872353.
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@article{osti_872353,
title = {Packed bed carburization of tantalum and tantalum alloy},
author = {Lopez, Peter C and Rodriguez, Patrick J and Pereyra, Ramiro A},
abstractNote = {Packed bed carburization of a tantalum or tantalum alloy object. A method for producing corrosion-resistant tantalum or tantalum alloy objects is described. The method includes the steps of placing the object in contact with a carburizing pack, heating the packed object in vacuum furnace to a temperature whereby carbon from the pack diffuses into the object forming grains with tantalum carbide along the grain boundaries, and etching the surface of the carburized object. This latter step removes tantalum carbides from the surface of the carburized tantalum object while leaving the tantalum carbide along the grain boundaries.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}
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