Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Vladimir Semenovitch Cherednichenko0
James Allen Fife0
John Crawley0
Date of Patent
April 6, 2010
0Patent Application Number
119296180
Date Filed
October 30, 2007
0Patent Primary Examiner
Patent abstract
Porous microparticles of high-purity tantalum may be processed in a vacuum plasmatron using a hollow cathode and spraying apparatus in which the coolant is in the form of a metal surface. In one embodiment, the initial powder of tantalum is introduced through a coaxial hole in a hollow cathode and supplied to a vertical column of plasma by inert gas and exposed to heating to temperatures close to the melting point of tantalum. The atomizing tantalum particles are directed through a hole in the anode and collide with a rotating inclined tantalum substrate and cooled from within water, thereby flattened and solidifying the particles.
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