Fiber reinforced ceramics of calcium phosphate series compounds
AssigneeIbiden Co., Ltd.
InventorsRyo Enomoto, Yoshimi Matsuno, Masato Yokoi
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Abstract
Calcium phosphate series compound ceramics are provided in which heat-resistant inorganic short fibers such as flawless SiC or Si.sub.3 N.sub.4 are three-dimensionally dispersed in a matrix composed of calcium phosphate series compound and entangled with each other to form a high strength shaped body as well as a method of producing the same. Also, a high density silicon carbide ceramic is provided in which biological glass is impregnated and filled in a porous shaped body. These composite ceramics have high strength and high toughness and are suitable as a heat-resistant structural material or a material for bio hard texture.
Claims7
A porous fiber reinforced composite ceramic of at least one calcium phosphate compound comprising about 1-45 vol. % of heat-resistant inorganic short fibers having an average length of not more than 10 mm and an average aspect ratio of 10.about.10000 three-dimensionally and uniformly dispersed in a matrix of at least one calcium phosphate compound, and at least part of the matrix is composed of at least one calcium phosphate compound produced in a heat treatment of at least one calcium phosphate compound precursor and pores existing in said ceramic being filled with biological glass.
A fiber reinforced composite ceramic of at least one calcium phosphate compound produced by a method which comprises:
- (1) wet mixing fine powder of calcium phosphate series compound with about 1-45 vol. % of heat-resistant inorganic short fibers having an average length of not more than 10 mm and an average aspect ratio of 10.about.10,000 and shaping this mixture to form a green shaped body;
- (2) impregnating the green shaped body with a solution of a precursor of at least one calcium phosphate compound and drying to form a preliminary shaped body;
- (3) heat treating the preliminary shaped body at a temperature of not less than 600.degree. C. to obtain a fiber reinforced ceramic having heat-resistant inorganic short fibers three-dimensionally and uniformly dispersed in a matrix of at least one calcium phosphate compound;
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- (4) filling biological glass in pores of said shaped body during or after the heat treatment.
Dependencies are inferred from the claim text.