Author： Tian L. Zhou Y. Zhou W-L.
Publisher： Springer Publishing Company
ISSN： 0022-2461
Source： Journal of Materials Science, Vol.33, Iss.3, 1998-02, pp. : 797-802
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Abstract
Hot-pressed nanosized SiC-particle (SiC_p-reinforced Si_3N_4 composites have been studied with respect to their microstructures, room temperature mechanical properties and thermal shock resistance. The experimental results indicate that the flexural strength, fracture toughness and thermal shock resistance are all increased by the addition of 5 vol% SiC_p. Further additions of SiC_p, however, have a detrimental effect on these properties. These changes are closely related to the effects of SiC_p on the matrix grain morphology. The mechanisms of nucleation and growth of β-Si_3N_4 grains in the presence of SiC nano-particles are discussed.
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