TRANSMISSION ELECTRON-MICROSCOPY INSITU OBSERVATION OF CRACK-PROPAGATION IN SINTERED ALUMINA
TRANSMISSION ELECTRON-MICROSCOPY INSITU OBSERVATION OF CRACK-PROPAGATION IN SINTERED ALUMINA
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DOI：
10.1080/09500839208219053
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发表时间：
1992-12-01
影响因子：
1.2
通讯作者：
KUBO, Y
中科院分区：
文献类型：
--
作者：
IKUHARA, Y;SUZUKI, T;KUBO, Y
在800℃的透射电镜下，通过原位应变实验观察了烧结氧化铝的裂纹扩展行为。裂纹尖端处产生位错，裂纹扩展过程中，裂纹尖端周围的应变轮廓线周期性振荡。当裂纹与晶界相交时，出现扇形应变后，裂纹通过晶界发生挠曲。
Crack propagation behaviour in sintered alumina has been observed by in situ straining experiments in a transmission electron microscope at 800-degrees-C. Dislocations were generated at the crack tips, and the strain contour line around the crack tips was found to oscillate periodically during crack propagation. Crack deflection through grain boundaries occurred after a fan-shaped strain appeared when the crack intersected the grain boundary.