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Fabrication and Microstructure of Al 2 O 3 –SiC–YAG Hybrid Composites Prepared by Particulate Dispersion
Author(s) -
Jang ByungKoog,
Kishi Teruo
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb05420.x
Subject(s) - materials science , microstructure , particulates , fabrication , composite material , grain size , dispersion (optics) , grain boundary , optics , medicine , ecology , alternative medicine , physics , pathology , biology
Stable Al 2 O 3 –SiC–YAG hybrid composites were successfully fabricated by reaction of Al 2 O 3 and Y 2 O 3 and incorporation of SiC. The hot‐pressed bodies consisted of uniformly dispersed grains of microsized YAG particulates and nanosized SiC particulates in an Al 2 O 3 matrix. Although the grain size of monolithic A1 2 O 3 increases markedly with increased temperature, the grain size of the Al 2 O 3 –SiC–YAG hybrid composites was effectively restrained due to grain‐boundary pinning by the particulates.