Method of manufacturing a composite ceramics sintered body

Details Method of manufacturing a composite ceramics sintered body Method of manufacturing a composite ceramics sintered body

1995-05-17

1996-12-17

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 60, 264122, B28B 300

Patent

active

055850553

ABSTRACT:
The strength of a composite sintered body including yttrium oxide is improved. A composite ceramics sintered body includes a matrix of yttrium oxide and silicon carbide particles dispersed within the matrix. A compound oxide phase including yttrium and silicon is present at the surface of the sintered body. A sintered body is obtained by compression-molding mixed powder including yttrium oxide powder and silicon carbide powder in an inert gas atmosphere of at least 1550.degree. C. The sintered body is subjected to a heat treatment for at least 0.5 hour and not more than 12 hours in an atmosphere including oxygen gas in the range of at least 900.degree. C. and less than 1200.degree. C.

REFERENCES:
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B. Elvers et al., Ullmann's Encyclopedia of Industrial Chemistry, vol. A15; 5th Edition; Weinheim, VCH Verlag, published 1990.
Article Entitled: "Mechanical Properties of Y.sub.2 O.sub.3 -Based Composites" by Masashi Yoshimura et al., Fourth Autumn Symposium, Ceramics Society of Japan (1991).
Japanese Industrial Standard (JIS) "Testing Method for Flexural Strength (Modulus of Rupture) of High Performance Ceramics", pp. 1-5; JIS R 1601-1981.

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