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US 5,495,550 AGranted
Graphite flash evaporator having at least one intermediate layer and a pyrolytic boron nitride coating
AssigneeAdvanced Ceramics Corporation
InventorsJohn T. Mariner, Douglas A. Longworth
Life of this patent
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Abstract
A flash evaporator vaporization vessel for flash evaporating metal under conditions of repeated thermal cycling having a graphite body, an outer layer of pyrolytic boron nitride and an intermediate layer of a material selected from the group consisting of pyrolytic graphite, boron carbide (B.sub.4 C), tantalum carbide, and silicon carbide and having a thickness of no greater than about 0,002 inches.
Claims4
A flash evaporator vaporization vessel for flash evaporating metal under repeated thermal cycling conditions comprising:
- a graphite body having a recessed cavity in which the metal to be vaporized is introduced, an outer pyrolytic boron nitride coating for said graphite body and at least one intermediate layer separating said pyrolytic boron nitride coating from said graphite body with said intermediate layer composed of a material selected from the group consisting of:
- pyrolytic graphite, boron carbide (B.sub.4 C), tantalum carbide, and silicon carbide and having a thickness of no greater than about 0.002 inches.
Dependencies are inferred from the claim text.