Packed bed carburization of tantalum and tantalum alloy

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872353

Lopez, Peter C ^[1]; Rodriguez, Patrick J ^[1]; Pereyra, Ramiro A ^[2]

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1. Espanola, NM
2. Medanales, NM

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of University of California (Los Alamos, NM)
• Patent Number(s): US 5916377
• OSTI ID: 872353
• Country of Publication: United States
• Language: English

Related Subjects

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
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