| Size-Dependent Melting Behaviour of Nanometre-Sized Pb Particles Studied by Dynamic Mechanical Analysis |
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| 作者姓名： | 陈晓明 费广涛 崔平 |
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| 作者单位： | Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PO Box 1129, Hefei 230031 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 19974052, 50172048, 10374090, and 10274085, the National Key Basic Research and Development Programme of China under Grant No 2005CB623603, the Hundred Talent Programme of Chinese Academy of Sciences, and the Talent Foundation of Anhui Province under Grant No 2002Z020. The authors are grateful to Professor J. Weissmuller and Professor G. Wilde for their encouragement and helpful discussion. |
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| 摘 要： | Nanometre-sized （hereafter nano-） Pb particles embedded in an Al matrix are prepared by ball milling. It is found that the size of nano-Pb particles was decreased with increasing milling time. The melting behaviour of nano-Pb particles embedded in the Al matrix is studied by means of dynamic mechanical analysis, and a single internal friction peak in the vicinity of Pb melting temperature is observed. The onset temperature of the peak moves to lower temperature with the decrease of particles size and the internal friction peak height is increased, which indicates a size-dependent melting behaviour of nano-Pb particles. It is suggested that the size-dependent melting behaviour is associated with surface melting.
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| 关 键 词： | 纳米尺寸铅微粒 分子动力学分析 铝杂基 纳米材料 |
| 收稿时间： | 2006-03-11 |
| 修稿时间： | 2006-03-11 |
Size-Dependent Melting Behaviour of Nanometre-Sized Pb Particles Studied by Dynamic Mechanical Analysis |
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| CHEN Xiao-Ming,FEI Guang-Tao,CUI Ping.Size-Dependent Melting Behaviour of Nanometre-Sized Pb Particles Studied by Dynamic Mechanical Analysis[J].Chinese Physics Letters,2006,23(6):1548-1550. |
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| Authors: | CHEN Xiao-Ming FEI Guang-Tao CUI Ping |
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| Institution: | Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, PO Box 1129, Hefei 230031 |
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| Abstract: | Nanometre-sized (hereafter nano-) Pb particles embedded in an Al matrix are prepared by ball milling. It is found that the size of nano-Pb particles was decreased with increasing milling time. The melting behaviour of nano-Pb particles embedded in the Al matrix is studied by means of dynamic mechanical analysis, and a single internal friction peak in the vicinity of Pb melting temperature is observed. The onset temperature of the peak moves to lower temperature with the decrease of particles size and the internal friction peak height is increased, which indicates a size-dependent melting behaviour of nano-Pb particles. It is suggested that the size-dependent melting behaviour is associated with surface melting. |
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| Keywords: | 64 70 Dv 62 40 +i 65 80 +n |
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