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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：天津大学
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. 机械设计及理论
办公地点：机械工程学院知方楼5055
联系方式：zzy@dlut.edu.cn
电子邮箱：zzy@dlut.edu.cn
Deformation and crack mechanisms of nanotwinned cadmium telluride under cyclic nanoindentations
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论文类型：期刊论文
发表时间：2014-12-15
发表刊物：SCRIPTA MATERIALIA
收录刊物：SCIE、EI
卷号：93
页面范围：12-15
ISSN号：1359-6462
关键字：Cyclic indentation; Crack; Nanotwinned deformation; CdTe; Molecular dynamics
摘要：The surface energies of monocrystalline (mc) and nanotwinned (nt) cadmium telluride (CdTe or CT) crystals, calculated using molecular dynamics simulations, are 435.08 and 381.8 mJ m(-2), respectively. A crack of mc-CT is induced at the second loading cycle, whereas nt-CT with both twin boundaries (TBs) shows a crack at the lower TB under the third unloading condition. However, nt-CT with three TBs is free from cracks after 10 cyclic loading unloading indentations, due to the combined effect between the hardening and softening nanotwins. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.