Packed bed carburization of tantalum and tantalum alloy

Patent · Tue Jun 29 00:00:00 EDT 1999

OSTI ID:6450197

Lopez, P C; Rodriguez, P J; Pereyra, R A

Packed bed carburization of a tantalum or tantalum alloy object is disclosed. 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. 4 figs.

• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Univ. of California, Los Alamos, NM (United States)
• Patent Number(s): A; US 5916377
• Application Number: PPN: US 9-063327
• OSTI ID: 6450197
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CARBIDES
CARBON COMPOUNDS
CARBURIZATION
CORROSION RESISTANT ALLOYS
ELEMENTS
FABRICATION
HARDENING
HEAT TREATMENTS
METALS
REFRACTORY METAL COMPOUNDS
SURFACE HARDENING
SURFACE TREATMENTS
TANTALUM
TANTALUM ALLOYS
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS