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Effects of Gadolinia and Alumina Addition on the Densification and Toughening of Silicon Carbide
Author(s) -
Chen Zhao
Publication year - 1996
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.1151-2916.1996.tb08160.x
Subject(s) - materials science , eutectic system , silicon carbide , toughening , fracture toughness , composite material , carbide , phase (matter) , chemical engineering , toughness , microstructure , chemistry , organic chemistry , engineering
SiC with mixtures of A1 2 O 3 and Gd 2 O 3 additions were effective in densifying SiC. The density of 98% of theoretical density was achieved with the Gd 2 O 3 and A1 2 O 3 eutectic composition. It is suggested that the improvement in density is due to liquid phase formed between A1 2 O 3 and Gd 2 O 3 . The sintered bodies have an improved fracture toughness due to the crack deflection mechanism.