Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Patent
1993-11-30
1995-10-17
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
501126, 501152, 501154, 428688, C04B 35505
Patent
active
054591112
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.
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patent: 4729972 (1988-03-01), Kodama et al.
B. Elvers et al., Ullmann's Encyclopedia of Industrial Chemistry, vol. A15; 5th Edition, Weinheim, VCH Verlag, published 1990, (no month) p. 530.
Japanese Industrial Standard (JIS) "Testing Method for Flexural Strength (Modulus of Rupture) of High Performance Ceramics" pp. 1-5; JIS R 1601-1981. (No month).
"Mechanical Properties of Y.sub.2 O.sub.3 -based Composite" by Masashi Yoshimura et al., Fourth Autumn Symposium, Ceramics Society of Japan (1991). (no month).
Niihara Koichi
Yoshimura Masashi
Bell Mark L.
Fasse W. F.
Fasse W. G.
Marcheschi Michael
Niihara Koichi
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