Coating apparatus – Gas or vapor deposition – Crucible or evaporator structure
Patent
1984-06-25
1985-07-16
Smith, John D.
Coating apparatus
Gas or vapor deposition
Crucible or evaporator structure
432264, 432265, 219271, 219275, 373 11, C23C 1312
Patent
active
045289395
ABSTRACT:
The present invention is directed to a containment vessel which is particularly useful in melting aluminum. The vessel of the present invention is a multilayered vessel characterized by being electrically conductive, essentially nonwettable by and nonreactive with molten aluminum. The vessel is formed by coating a tantalum substrate of a suitable configuration with a mixture of yttria and particulate metal borides. The yttria in the coating inhibits the wetting of the coating while the boride particulate material provides the electrical conductivity through the vessel. The vessel of the present invention is particularly suitable for use in melting aluminum by ion bombardment.
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Holcombe Cressie E.
Scott Donald G.
Hamel Stephen D.
Hightower Judson R.
Larcher Earl L.
Plantz Bernard F.
Smith John D.
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