炭化珪素ウィスカ強化窒化珪素(SiC-Whisker/Si_3N_4)の疲労に及ぼす荷重繰返しの影響

概要

論文の詳細を見る
The cyclic effect on fatigue of a SiC-Whisker/Si_2N_4 composite (CMC) was investigated. Three-point bending specimens were used for both static fatigue and cyclic fatigue tests at room and an elevated (1400℃) temperatures. The following conclusion were obtained from the experiment. The cyclic effect on fatigue of CMC seems to exist at the the both temperatures when the fatigue life under cyclic loading is compared with the static fatigue life in terms of time from a viewpoint of slow crack growth (SCG). However, the observed cyclic effect is not much appreciable. The fatigue of CMC is mostly dominated by SCG. The cyclic effect at room termperature is larger than that at 1400℃. At 1400℃, the cyclic effect becomes large with an increase in applied stress. SCG area in the fracture surface of the specimen under sustained loading is smaller than that under cyclic loading.
社団法人日本材料学会の論文
1993-05-15