1Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics, Hunan Normal University, Changsha 410081 2College of Mathematics and Physics, University of South China, Hengyang 421001 3College of Mathematics and Computer Science, Hunan Normal University, Changsha 410081 4Computer and Information Engineering School, Central South University of Forestry and Technology, Changsha 410004 5Department of Physics, Guangxi University, Nanning 530004 6Department of Applied Physics, Hunan University, Changsha 410082 7International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
Size Model of Critical Temperature for Grain Growth in Nano V and Au
1Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics, Hunan Normal University, Changsha 410081 2College of Mathematics and Physics, University of South China, Hengyang 421001 3College of Mathematics and Computer Science, Hunan Normal University, Changsha 410081 4Computer and Information Engineering School, Central South University of Forestry and Technology, Changsha 410004 5Department of Physics, Guangxi University, Nanning 530004 6Department of Applied Physics, Hunan University, Changsha 410082 7International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
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.
Abstract：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.
(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
引用本文:
LU Yun-Bin;LIAO Shu-Zhi**;PENG Hao-Jun;ZHANG Chun;ZHOU Hui-Ying;XIE Hao-Wen;OUYANG Yi-Fang;ZHANG Bang-Wei;
. Size Model of Critical Temperature for Grain Growth in Nano V and Au[J]. 中国物理快报, 2011, 28(8): 80502-080502.
LU Yun-Bin, LIAO Shu-Zhi**, PENG Hao-Jun, ZHANG Chun, ZHOU Hui-Ying, XIE Hao-Wen, OUYANG Yi-Fang, ZHANG Bang-Wei,
. Size Model of Critical Temperature for Grain Growth in Nano V and Au. Chin. Phys. Lett., 2011, 28(8): 80502-080502.
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