Cyclic Fatigue-Crack Propagation Behavior in Silicon Carbide: Long- and Small-Crack Behavior

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Cyclic fatigue properties of high-toughness SiC with additives of Al2O3 and Y2O3 were examined, with a focus on differences between long- (>3 mm) and small-crack (<200 <mu>m) behavior. Small cracks were initiated with Vickers indents placed on the tensile surfaces of beams, and crack extension was monitored optically under cyclic load. For small cracks, high growth rates which exhibited a negative dependence on the far-field driving force were observed. Such behavior was explained by both indent-induced residual stresses and the relative size of cracks compared with bridging zone lengths.
Publisher
WILEY-BLACKWELL
Issue Date
2001-03
Language
English
Article Type
Article
Keywords

RESISTANCE-CURVE BEHAVIOR; B-C ADDITIONS; FRACTURE-TOUGHNESS; CERAMICS; ALUMINA; GROWTH; THICKNESS

Citation

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.84, no.3, pp.551 - 554

ISSN
0002-7820
URI
http://hdl.handle.net/10203/83578
Appears in Collection
MS-Journal Papers(저널논문)
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