Tensile Mechanical Responses of beta-Si3N4 Nanowires Along the [10 (1)over-bar0] Direction Under Different Loading Temperatures and Extreme Strain Rates: A Molecular Dynamics Study

doi:10.1166/nnl.2017.2356

	Tensile Mechanical Responses of beta-Si3N4 Nanowires Along the [10 (1)over-bar0] Direction Under Different Loading Temperatures and Extreme Strain Rates: A Molecular Dynamics Study
	Lu, Xuefeng; Gao, Xu; Guo, Xin; Dong, Qizheng; La, Peiqing
刊名	NANOSCIENCE AND NANOTECHNOLOGY LETTERS
	2017-03
卷号	9 期号:3 页码:233-240
关键词	Silicon Nitride Nanowire Tensile Mechanical Response Fracture Mechanism Molecular Dynamics
ISSN号	1941-4900
DOI	10.1166/nnl.2017.2356
英文摘要	Molecular dynamics simulations are employed to qualitatively assess the tensile mechanical response of a beta-Si3N4 nanowire subjected to various loading conditions in the [10 (1) over bar0] direction. We found that the nanowire displayed linear (epsilon < 0.025) and nonlinear (epsilon > 0.025) stress-strain response and that the fracture stresses and strains decreased gradually with the increase in loading temperature, which is attributed to the formation of a large number of Si-Si bonds and the single N-atom defects. As the strain rate increased, an obvious increase in fracture stress and strain was observed. High strain rates are responsible for the appearance of two types of defects and then lead to the delay of crack initiation. This is probably related to the response tendency of an impact deformation. The insight into the effects of the loading conditions on mechanical behaviors is expected to guide the design strategies aimed at creating reliable Si3N4-based nanodevices.
资助项目	National Natural Science Foundation of China[51662026][51402142][51561020][21301084] ; China Postdoctoral Science Foundation[2015M572615][2016T90959] ; Gansu Provincial Youth Science and Technology Fund Projects[1606RJZA157][1506RJYA093] ; Program for Hongliu Young Teachers in Lanzhou University of Technology[Q201401]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER SCIENTIFIC PUBLISHERS
WOS记录号	WOS:000397994800002
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33337]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Guo, Xin
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Lu, Xuefeng,Gao, Xu,Guo, Xin,et al. Tensile Mechanical Responses of beta-Si3N4 Nanowires Along the [10 (1)over-bar0] Direction Under Different Loading Temperatures and Extreme Strain Rates: A Molecular Dynamics Study[J]. NANOSCIENCE AND NANOTECHNOLOGY LETTERS,2017,9(3):233-240.
APA	Lu, Xuefeng,Gao, Xu,Guo, Xin,Dong, Qizheng,&La, Peiqing.(2017).Tensile Mechanical Responses of beta-Si3N4 Nanowires Along the [10 (1)over-bar0] Direction Under Different Loading Temperatures and Extreme Strain Rates: A Molecular Dynamics Study.NANOSCIENCE AND NANOTECHNOLOGY LETTERS,9(3),233-240.
MLA	Lu, Xuefeng,et al."Tensile Mechanical Responses of beta-Si3N4 Nanowires Along the [10 (1)over-bar0] Direction Under Different Loading Temperatures and Extreme Strain Rates: A Molecular Dynamics Study".NANOSCIENCE AND NANOTECHNOLOGY LETTERS 9.3(2017):233-240.