一种大颗粒石墨/铜基复合材料
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摘要
依据粉末冶金原理,尝试采用较大粒度的石墨颗粒来制备铜/石墨复合材料,旨在通过添加石墨颗粒来提高铜的润滑性能。采用混粉、压制、烧结等主要工艺,方法简便高效。利用Hitachi S-4800型冷场发射扫描电子显微镜观察分析了石墨颗粒粒度、石墨含量、烧结温度、保温时间等不同工艺参数对铜/石墨复合材料的内部组织和外观形貌的影响。研究结果表明,本铜/石墨复合材料的组织形貌主要受石墨颗粒粒度和石墨添加量影响,加入较多的小尺度石墨颗粒会提高对纯铜基体的割裂效果。
In terms of the powder metallurgy principle, larger graphite particles are used to prepare the copper/graphite composite to improve the lubricating property of copper. The technology of mixing, pressing and sintering is applied, making the process simple and efficient.With the help of Hitachi S-4800 cold field emission scanning electron microscope, the effect of different parameters(the graphite particle size and content, sintering temperature,sintering period) on the appearance and internal structure of the copper/graphite particle composite is analyzed. The results show that the structure and basic physical properties of copper/graphite composite are mainly affected by the particle size and addition amount of graphite. Larger amount of smaller graphite particles can improve the division effect of copper substrate.
In terms of the powder metallurgy principle, larger graphite particles are used to prepare the copper/graphite composite to improve the lubricating property of copper. The technology of mixing, pressing and sintering is applied, making the process simple and efficient.With the help of Hitachi S-4800 cold field emission scanning electron microscope, the effect of different parameters(the graphite particle size and content, sintering temperature,sintering period) on the appearance and internal structure of the copper/graphite particle composite is analyzed. The results show that the structure and basic physical properties of copper/graphite composite are mainly affected by the particle size and addition amount of graphite. Larger amount of smaller graphite particles can improve the division effect of copper substrate.
引文
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[17] 周永欣,徐飞,吕振林,等.SiC和石墨颗粒混杂增强铜基复合材料的摩擦磨损性能[J].机械工程材料,2015(02):90-93.
[18] 张晓丹,崔云涛,马捷,等.石墨的铜包覆量对自润滑材料的性能影响[J].有色金属(冶炼部分),2016(01):53-57.
[19] 王发展,许云华.用区熔法制备Cu/C复合材料[J].西安建筑科技大学学报,2000,32(4):376-378.
[2] 南墅石墨矿.石墨[M].北京:中国建筑工业出版社,1975.
[3] 刘军,严红革,陈刚,等.铜基复合材料受电弓滑板摩擦磨损及电阻率的研究[J].矿冶工程,2007,27(2):71-74.
[4] 吴哲,杨春梅,张杨,等.钨纤维增强铜基复合材料构造木基防弹板的机理研究[J].安徽农业科学,2013(28):11407-11409.
[5] 郭俊贤,王波,杨振宇.石墨烯/Cu复合材料力学性能的分子动力学模拟[J].复合材料学报,2014,31(1):152-157.
[6] 李建伟,张海龙,张少明,等.金刚石表面镀钨对铜/金刚石复合材料热导率的影响[J].功能材料,2016(01):1034-1037.
[7] 刘秋香,董桂霞,陈惠,等.超高压烧结法制备金刚石/铜复合材料的性能研究[J].材料导报,2013(24):66-69.
[8] Dong Y H,Zhang R Q,He X B,et al.Fabrication and infiltration kinetics analysis of Ti-coated diamond/copper composites with near-net-shape by pressureless infiltration[J].Materials Science & Engineering B,2012,177(17):1524-1530.
[9] 许尧.高导热石墨/铜复合材料的制备及性能研究[D].武汉:华中科技大学,2013.
[10] 张煜,宋美慧,李岩,等.氮化铝颗粒增强铜基复合材料的制备及性能[J].黑龙江科技大学学报,2016(01):48-52.
[11] 高强,吴渝英,翟宁,等.铜石墨材料导电性能研究[J].机械工程材料,2002(9):34-36.
[12] He D H,Manory R.A novel electrical contact material with improved self-lubrication for railway current collectors[J].Wear,2001,249(7):626-636.
[13] Tang Y,Liu H,Zhao H,et al.Friction and wear properties of copper matrix composites reinforced with short carbon fibers[J].Materials & Design,2008,29(1):257-261.
[14] Fathy A,Shehata F,Abdelhameed M,et al.Compressive and wear resistance of nanometric alumina reinforced copper matrix composites[J].Materials & Design,2012,36:100-107.
[15] Hong E,Kaplin B,You T,et al.Tribological properties of copper alloy-based composites reinforced with tungsten carbide particles[J].Wear,2011,270(9–10):591-597.
[16] 刘元,李长生,唐华,等.纳米NbSe_2铜基自润滑复合材料的摩擦学性能[J].润滑与密封,2010(06):50-53.
[17] 周永欣,徐飞,吕振林,等.SiC和石墨颗粒混杂增强铜基复合材料的摩擦磨损性能[J].机械工程材料,2015(02):90-93.
[18] 张晓丹,崔云涛,马捷,等.石墨的铜包覆量对自润滑材料的性能影响[J].有色金属(冶炼部分),2016(01):53-57.
[19] 王发展,许云华.用区熔法制备Cu/C复合材料[J].西安建筑科技大学学报,2000,32(4):376-378.