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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：机械工程学院
学科：机械制造及其自动化
办公地点：机械工程学院高性能制造研究所#5015室
联系方式：手机：15104088992
电子邮箱：gaoshang@dlut.edu.cn
Deformation patterns and fracture stress of beta-phase gallium oxide single crystal obtained using compression of micro-pillars
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论文类型：期刊论文
发表时间：2019-02-01
发表刊物：JOURNAL OF MATERIALS SCIENCE
收录刊物：SCIE、EI
卷号：54
期号：3
页面范围：1958-1966
ISSN号：0022-2461
关键字：Deformation; Fracture; High resolution transmission electron microscopy; Single crystals; Transmission electron microscopy, Compressive strain; Deformation defects; Deformation pattern; Fracture stress; Gallium oxides; Lattice bending; Lattice plane; Micro Pillars, Gallium compounds
摘要：The deformation of single-crystal beta-phase gallium oxide (or -Ga2O3) micro-pillars under compression was investigated with the aid of transmission electron microscopy. High-density stacking faults were the dominant deformation defects in the plastically deformed micro-pillars. Micro-cracks were found along (200), (001) and (010) lattice planes and fracture occurred along (200) lattice plane when compressive strain was sufficiently great. Lattice bending was also observed in the fractured pillar. The average fracture stress and strain of -Ga2O3 being measured are 7.25 +/- 1.11GPa and 3.80 +/- 0.57%, respectively, which have never been reported previously.