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Purification of tantalum by plasma arc melting

Patent ·
OSTI ID:872603
 [1];  [2]
  1. Santa Fe, NM
  2. Los Alamos, NM
+ Show Author Affiliations
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.
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 5972065
OSTI ID:
872603
Country of Publication:
United States
Language:
English

References (3)

Representation of mixed reactive gases on free energy (Ellingharn-Richardson) diagrams journal February 1996
Production of Pure Tantalum by Carbon-Reduction Smelting and Hydrogen Plasma-Arc Melting with Refining journal January 1990
Recent Developments in Plasma Metal Processing journal January 1986

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Related Subjects

/75/423/
carbon
flowing
found
gas
gas generated
gas mixture
gases
generated
helium
hydrogen
impurities
level
melting
mixture
oxygen
plasma
plasma gas
purification
purpose
reduced
superior
tantalum