Method of making a boron carbide cermet with an aluminum oxide l

Details Method of making a boron carbide cermet with an aluminum oxide l Method of making a boron carbide cermet with an aluminum oxide l

1995-12-19

1997-01-21

Ryan, Patrick

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

428688, 428568, 419 14, 419 10, 419 19, 419 27, 419 56, 264 60, B32B 900

Patent

active

055956220

ABSTRACT:
Prepare boron carbide-aluminum structural composites by infiltrating molten aluminum or aluminum alloy into a porous preform that is either unbaked or baked at a temperature of up to 1800.degree. C. to form a densified cermet and then heat treat the cermet in air or an oxygen-containing atmosphere to form a dense outer surface layer of aluminum oxide. The resulting structural cermets can withstand prolonged exposure to temperatures above the melting point of aluminum without suffering undue degradation of physical properties such as flexure strength.

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