Temperature effect on mechanical response of c-plane monocrystalline gallium nitride in nanoindentation: A molecular dynamics study

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成果类型：

期刊论文

作者：

Guo, Jian;Chen, Jingjing;Wang, Yongqiang*

通讯作者：

Wang, Yongqiang

作者机构：

[Guo, Jian; Wang, Yongqiang] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.

[Chen, Jingjing] Nanjing Univ Aeronaut & Astronaut, Nanjing 210016, Jiangsu, Peoples R China.

通讯机构：

[Wang, Yongqiang] U

Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.

语种：

英文

关键词：

Deformation;GaN;MD simulation;Mechanical properties;Nanoindentation;Temperature

期刊：

Ceramics International

ISSN：

0272-8842

年：

2020

卷：

期：

页码：

12686-12694

DOI：

10.1016/j.ceramint.2020.02.035

基金类别：

National Natural Science Foundation of ChinaNational Natural Science Foundation of China [51805240]; Natural Science Foundation of Hunan ProvinceNatural Science Foundation of Hunan Province [2018JJ2328, 2018JJ3507]; Scientific Research Foundation of University of South China; HPC Center of University of South China

机构署名：

本校为第一且通讯机构

院系归属：

机械工程学院

摘要：

A series of three-dimensional molecular dynamics (MD) simulations was performed to investigate the effect of temperature on the nanoscale deformation behaviour and mechanical properties of c-plane monocrystalline gallium nitride (GaN) under nanoindentation. Simulation results showed that the atomic displacement and strain increased with increasing temperature. Thus, the nucleation and propagation of dislocations in the main slip systems were promoted to intensify the plastic deformation of GaN crystal. Increasing the temperature also contribute...

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Temperature effect on mechanical response of c-plane monocrystalline gallium nitride in nanoindentation: A molecular dynamics study

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