| Research on Percolation Network and Physical Properties of Graphite/Antimony Composites |
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| 作者姓名： | HU Ya-fei HE Min WANG Qi-li |
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| 作者单位： | [1]School of Chemical Engineering and Technology, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China [2]School of Materials Science and Engineering, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China |
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| 摘 要： | The microstructure, friction and wear behaviour of graphite preform and graphite/antimony composites are analysed based on the percolation theory of hydrodynamics to investigate the relationship between the percolation network and physical properties of graphite/antimony composites. The result shows that there are two important factors to enhance friction and wear behaviour of graphite/antimony composites at high temperature： 1） the formation of the pore network in the preform, which is called the first percolation and 2） the optimization of infiltration method in the process of infiltrating antimony, which is called the second percolation. By adding some pyrolysate and controlling the roasting process, perfect net pores and sub-micron percolation microstructure may be formed in the graphite preform. By con- trolling the infiltration process, the saturation of molten antimony infiltrating into perfect pores can be optimized.
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| 关 键 词： | 渗滤网 物理性能 石墨 锑 气孔 摩擦 磨损 |
| 收稿时间： | 2005-11-28 |
| 修稿时间： | 2006-01-12 |
Research on Percolation Network and Physical Properties of Graphite/Antimony Composites |
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| HU Ya-fei HE Min WANG Qi-li.Research on Percolation Network and Physical Properties of Graphite/Antimony Composites[J].Journal of China University of Mining and Technology,2006,16(2):189-192. |
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| Authors: | HU Ya-fei HE Min WANG Qi-li |
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| Abstract: | The microstructure, friction and wear behaviour of graphite preform and graphite/antimony composites are analysed based on the percolation theory of hydrodynamics to investigate the relationship between the percolation net- work and physical properties of graphite/antimony composites. The result shows that there are two important factors to enhance friction and wear behaviour of graphite/antimony composites at high temperature: 1) the formation of the pore network in the preform, which is called the first percolation and 2) the optimization of infiltration method in the process of infiltrating antimony, which is called the second percolation. By adding some pyrolysate and controlling the roasting process, perfect net pores and sub-micron percolation microstructure may be formed in the graphite preform. By con- trolling the infiltration process, the saturation of molten antimony infiltrating into perfect pores can be optimized. |
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| Keywords: | graphite antimony-infiltrating percolation pore friction and wear behaviour |
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