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Purification of tantalum by plasma arc melting

United States Patent

5,972,065
October 26, 1999
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Purification of tantalum by plasma arc melting. The level of oxygen and carbon impurities in tantalum was reduced by plasma arc melting the tantalum using a flowing plasma gas generated from a gas mixture of helium and hydrogen. The flowing plasma gases of the present invention were found to be superior to other known flowing plasma gases used for this purpose.
Dunn; Paul S. (Santa Fe, NM), Korzekwa; Deniece R. (Los Alamos, NM)
The Regents of the University of California (Los Alamos, NM)
08/ 891,662
July 10, 1997
This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy to the Regents of the University of California. The government has certain rights in the invention.