Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Patent
1997-03-28
1999-09-21
Marcantoni, Paul
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
428384, 428387, 428698, 428699, 428704, 264626, 427226, 4272551, 42725538, 427255294, 20419228, 20419237, C04B 3556
Patent
active
059553910
ABSTRACT:
In fiber composite ceramic containing reaction sintered SiC as a matrix and having BN-coated SiC continuous fibers as composite fibers, the thickness of the BN coating need not be especially made large, and a sliding effect during growing of cracks can be improved, i.e., breakdown energy can be increased. A method of manufacturing fiber composite ceramic in which large number of BN-coated SiC fibers covered with a BN coating are gathered to form yarns, or yarns are woven to form a two-dimensional or three-dimensional fabric, and a preform is formed by the yarns or the fabric, C powder is arranged in a gap portion between fibers of the preform to form a compact, a molten Si is impregnated into the compact to form an SiC matrix between fibers. A region having a high B concentration is formed around the SiC fibers before the preform is impregnated with the molten Si, and B in the region is solid-solved in Si during reaction sintering to suppress B in the BN-coated SiC fibers from being solid-solved in Si.
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Asayama Masahiro
Hayakawa Yoshinori
Kameda Tsuneji
Sayano Akio
Suyama Shoko
Kabushiki Kaisha Toshiba
Marcantoni Paul
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