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Impact Damage and Strength Degradation in a Silicon Carbide Reinforced Silicon Nitride Composite
Author(s) -
Akimune Yoshio
Publication year - 1990
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.1151-2916.1990.tb06710.x
Subject(s) - materials science , hot isostatic pressing , composite material , silicon carbide , elastic modulus , fracture toughness , composite number , hot pressing , silicon nitride , deformation (meteorology) , toughness , carbide , fracture mechanics , metallurgy , sintering , layer (electronics)
Adding SiC particles to Si 3 N 4 and subjecting the mixture to a sinter‐hot‐isostatic‐pressing process increases both the strength and elastic modulus. It also decreases the hardness but maintains the fracture toughness, which results in a higher resistance to crack initiation and propagation during spherical particle impact. Sinter‐hot‐isostatically‐pressed composites exhibit elastic response as their dominant behavior. They also display a high resistance to Hertzian cone crack initiation and extension. This is due to the increased degree of inelastic deformation of sinter‐hot‐isostatically‐pressed composites.