Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 92, Issue 3, Pages 688-693Publisher
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1551-2916.2008.02904.x
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Characterization of processing defects in structural ceramics is very important for the investigation of mechanical property, because processing defects are origin of fracture and govern the strength of products. The relationship between defects and strength is represented by simple equation which contains factor of defect size. In this study, size of defects in alumina ceramics was measured by optical microscopy with sintered body thinned to about 150 mu m. The size distribution was used for strength calculation based on linear fracture mechanics. Average and Weibull modulus of calculated strength were very agreed with experimentally measured them. The result shows that defects in sintered body govern the strength and are quantitatively related to strength by fracture mechanics.
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