焼成肌窒化けい素試験片の破壊強度特性

概要

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In order to investigate the fracture strength properties of as-sintered surface, fast fracture tests at room temperature and 1000℃ and static fatigue tests at 1000℃ were conducted using silicon nitride specimens with as-sintered surface. From the fast fracture tests, it was clarified that the fast fracture strength of as-sintered specimens was dominated by the size of flaw which existed on the specimen surface. But it was clarified by the static fatigue tests that the fatigue life time at 1000℃ was not dominated by the size of flaw only. The above property is due to the difference in crack propagation property of each specimen, and this fact was confirmed by the measurement of static fatigue life of controlled surface flaw specimens.
社団法人日本材料学会の論文
1995-05-15