Rhombohedral Twinning in Alumina
Rhombohedral Twinning in Alumina
复制标题
氧化铝中的菱面体孪晶
DOI：
10.1111/j.1151-2916.1983.tb09962.x
复制
发表时间：
1983
影响因子：
3.9
通讯作者：
K. Orr
中科院分区：
文献类型：
--
作者：
W. D. Scott;K. Orr
在625 ~ 1373 K的温度下，氧化铝单晶沿着c轴压缩变形。在900 ~ 1373 K之间，当剪切应力为12.6MPa时，观察到大尺度的菱面体孪晶变形。在900 K以下，磨削表面试样的孪晶应力在625 K时迅速上升到227 MPa。提出了一个无位错滑移时孪晶生长的模型。
Alumina single crystals were deformed in compression along the c axes at temperatures of 625 to 1373 K. Large scale deformation by rhombohedral twinning was observed at a constant resolved shear stress of only 12.6 MPa between about 900 and 1373 K. Below 900 K, the twinning stress for specimens with ground surfaces rose rapidly to 227 MPa at 625 K. A model for twin growth in the absence of dislocation slip is proposed.