Deformation-induced phase transformation in 4H-SiC nanopillars

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	Deformation-induced phase transformation in 4H-SiC nanopillars
	Chen B; Wang J(王军); Zhu YW; Liao XZ; Lu CS; Mai YW; Ringer SP; Ke FJ(柯孚久); Shen YG; Liao, XZ (reprint author), Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia.
刊名	Acta Materialia
	2014-11
卷号	80 页码:392-399
关键词	Sic Nanopillars Phase Transformation In Situ Deformation Transmission Electron Microscopy Molecular Dynamics
ISSN号	1359-6454
产权排序	[Chen, Bin; Zhu, Yiwei; Liao, Xiaozhou; Mai, Yiu-Wing; Ringer, Simon P.] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia; [Wang, Jun] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Wang, Jun; Shen, Yaogen] City Univ Hong Kong, Dept Mech & Biomed Engn, Kowloon, Hong Kong, Peoples R China; [Lu, Chunsheng] Curtin Univ, Dept Mech Engn, Perth, WA 6845, Australia; [Ringer, Simon P.] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia; [Ke, Fujiu] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
文献子类	Article
英文摘要	The deformation behaviour of single-crystal SiC nanopillars was studied by a combination of in situ deformation transmission electron microscopy and molecular dynamics simulations. An unexpected deformation-induced phase transformation from the 4H hexagonal structure to the 3C face-centred cubic structure was observed in these nanopillars at room temperature. Atomistic simulations revealed that the 4H to 3C phase transformation follows a stick-slip process with initiation and end stresses of 12.1-14.0 and 7.9-9.0 GPa, respectively. The experimentally measured stress of 9-10 GPa for the phase transformation falls within the range of these theoretical upper and lower stresses. The reasons for the phase transformation are discussed. The finding sheds light on the understanding of phase transformation in polytypic materials at low temperature. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
学科主题	Materials Science ; Metallurgy & Metallurgical Engineering
分类号	一类
URL标识	查看原文
语种	英语
WOS记录号	WOS:000344208300035
资助机构	We are grateful for the scientific and technical input and support from the Australian Microscopy and Microanalysis Research Facility node at the University of Sydney: Sydney Microscopy & Microanalysis. This research has been supported by the Australian Research Council (DP0985450 and FT110100236), the National Natural Science Foundation of China (Grant Nos. 11172024, 11232013 and 11372022), the National Basic Research Program of China (2012CB937500), the Opening Fund of State Key Laboratory of Nonlinear Mechanics and the Research Grant Council of the Hong Kong Special Administrative Region, China (Project No. City U 120611 (9041679)). MD simulations were conducted at iVEC through the use of advanced computing resources located at iVEC@Murdoch. Partial computational resources were provided by the Intersect Australia Ltd.
公开日期	2014-12-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49389]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Liao, XZ (reprint author), Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia.
推荐引用方式 GB/T 7714	Chen B,Wang J,Zhu YW,et al. Deformation-induced phase transformation in 4H-SiC nanopillars[J]. Acta Materialia,2014,80:392-399.
APA	Chen B.,王军.,Zhu YW.,Liao XZ.,Lu CS.,...&Liao, XZ .(2014).Deformation-induced phase transformation in 4H-SiC nanopillars.Acta Materialia,80,392-399.
MLA	Chen B,et al."Deformation-induced phase transformation in 4H-SiC nanopillars".Acta Materialia 80(2014):392-399.