Coated ceramic filler materials

Details Coated ceramic filler materials Coated ceramic filler materials

1987-06-12

1993-04-13

Nelson, Peter A.

Compositions

Preservative agents

Anti-corrosion

25238741, 25240031, 25240041, 428446, C09K 300, B32B 904

Patent

active

052020592

ABSTRACT:
Coated ceramic filler materials comprised of ceramic particles, fibers, whiskers, etc. having at least two substantially continuous coatings thereon are provided. The coatings are selected so that the interfacial shear strength between the ceramic filler material and the first coating, between coatings, or between the outer coating and the surrounding matrix material, are not equal so as to permit debonding and pull-out when fracture occurs. The resultant, multi-coated ceramic filler materials may be employed to provide ceramic matrix composites with increased fracture toughness. The ceramic filler materials are designed to be particularly compatible with ceramic matrices formed by directed oxidation of precursor metals.

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