Size-dependent mechanical behavior of a-silicon carbide nanowires under in-situ transmission electron microscopy tensile tests

doi:10.1088/2053-1591/aaf91d

	Size-dependent mechanical behavior of a-silicon carbide nanowires under in-situ transmission electron microscopy tensile tests
	Yang, Yang; Cui, Yan; Fu, Zhengqian; Li, Tie; Xu, Fangfang; Wang, Yuelin
刊名	MATERIALS RESEARCH EXPRESS
	2019-04-01
卷号	6 期号:4
关键词	silicon carbide nanowires in-situ TEM tensile test mechanical behavior size effect
ISSN号	2053-1591
DOI	10.1088/2053-1591/aaf91d
文献子类	Article
英文摘要	In-depth understanding of mechanical behavior of silicon carbide (SiC) at nanoscale was of great importance for its widespread application. However, the exploration of the relationship between mechanical properties and deformation mechanism has been impeded due to the lack of in situ measurement technology. Here we comprehensively studied the mechanical behavior of single crystal alpha-SiC nanowires (NWs) via a micro-electro-mechanical-system (MEMS) based in situ transmission electron microscopy (TEM) tensile experiments. Young's modulus, fracture strength and elastic strain limit of alpha-SiC NWs with the diameter ranging from 48 nm to 182 nm were investigated. Combining the various existing results of SiC nanostructures, general trends were found that fracture strength and elastic strain limit increased with the decreasing of diameter, while Young's modulus kept constant. Besides, all of the alpha-SiC NWs were elastically deformed until brittle fracture during tensile tests. By the aid of the in situ observations of deformation processes and fracture morphologies, the mechanism of size-dependent fracture strength and elastic strain limit of single crystal alpha-SiC NWs were discussed. The present findings provided guidance for the development and application of advanced micro-/ nano- electronic devices with the comprehensive usage of SiC NWs in the future.
WOS研究方向	Materials Science
语种	英语
出版者	IOP PUBLISHING LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27248]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Yang, Yang,Cui, Yan,Fu, Zhengqian,et al. Size-dependent mechanical behavior of a-silicon carbide nanowires under in-situ transmission electron microscopy tensile tests[J]. MATERIALS RESEARCH EXPRESS,2019,6(4).
APA	Yang, Yang,Cui, Yan,Fu, Zhengqian,Li, Tie,Xu, Fangfang,&Wang, Yuelin.(2019).Size-dependent mechanical behavior of a-silicon carbide nanowires under in-situ transmission electron microscopy tensile tests.MATERIALS RESEARCH EXPRESS,6(4).
MLA	Yang, Yang,et al."Size-dependent mechanical behavior of a-silicon carbide nanowires under in-situ transmission electron microscopy tensile tests".MATERIALS RESEARCH EXPRESS 6.4(2019).