Size Model of Critical Temperature for Grain Growth in Nano V and Au

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	Size Model of Critical Temperature for Grain Growth in Nano V and Au
	Y. B. Lu; S. Z. Liao; H. J. Peng; C. Zhang; H. Y. Zhou; H. W. Xie; Y. F. Ouyang; B. W. Zhang
	2011
发表期刊	Chinese Physics Letters
ISSN	0256-307X
卷号	28 期号:8
摘要	The intrinsic thermodynamical factors that dominate the stability of nanocrystallines are investigated through the microcosmic process of grain growth. The results suggest that nanocrystallines grows at a certain temperature and the critical temperature is determined by the vacancy formation energy and diffusion activation energy of the nanocrystallines. Based on the hypothesis, a simple model is proposed to predict the size-dependent critical temperature of grain growth. Within this model, we investigate the thermal stability of nanocrystallines V and Au, compared with the results available. It is shown that the critical temperature decreases with decreasing size, showing an evident size effect. The research reveals that the thermal stability is dependent on the energetic state of the nanocrystallines and the mobility of the inner atoms.
部门归属	[lu yun-bin; liao shu-zhi; peng hao-jun; xie hao-wen] hunan normal univ, minist educ, dept phys, key lab low dimens quantum struct & quantum contr, changsha 410081, hunan, peoples r china. [lu yun-bin] univ s china, coll math & phys, hengyang 421001, peoples r china. [zhang chun] hunan normal univ, coll math & comp sci, changsha 410081, hunan, peoples r china. [zhou hui-ying] cent s univ forestry & technol, comp & informat engn sch, changsha 410004, hunan, peoples r china. [ouyang yi-fang] guangxi univ, dept phys, nanning 530004, peoples r china. [zhang bang-wei] hunan univ, dept appl phys, changsha 410082, hunan, peoples r china. [zhang bang-wei] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;liao, sz (reprint author), hunan normal univ, minist educ, dept phys, key lab low dimens quantum struct & quantum contr, changsha 410081, hunan, peoples r china;liaosz@hunnu.edu.cn
关键词	Ray-diffraction Method Nanocrystalline Materials Vacancy Production Thermal-stability Boundary Motion Simulation Energy Gold Pd
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WOS记录号	WOS:000294100300007
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30568
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. B. Lu,S. Z. Liao,H. J. Peng,et al. Size Model of Critical Temperature for Grain Growth in Nano V and Au[J]. Chinese Physics Letters,2011,28(8).
APA	Y. B. Lu.,S. Z. Liao.,H. J. Peng.,C. Zhang.,H. Y. Zhou.,...&B. W. Zhang.(2011).Size Model of Critical Temperature for Grain Growth in Nano V and Au.Chinese Physics Letters,28(8).
MLA	Y. B. Lu,et al."Size Model of Critical Temperature for Grain Growth in Nano V and Au".Chinese Physics Letters 28.8(2011).