Packed bed carburization of tantalum and tantalum alloy

Patent · Thu Dec 31 23:00:00 EST 1998

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
• 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

/148/216/
alloy
bed
bed carburization
boundaries
carbide
carbides
carbon
carburization
carburized
carburizing
contact
corrosion-resistant
described
diffuses
etching
forming
furnace
grain
grain boundaries
grains
heating
latter
leaving
method
pack
packed
packed bed
placing
producing
removes
step
steps
surface
tantalum
tantalum alloy
temperature
vacuum
vacuum furnace
whereby