热压烧结Gr/6061Al复合材料的组织与性能
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摘要
采用热压烧结法制备了片层石墨(Gr)含量为1%～25%(体积分数,下同)的Gr/6061Al复合材料,并采用纳米铝粉包覆片层石墨的混粉工艺提高片层石墨在铝基体粉末中的分散均匀性。所制备的复合材料中,片层石墨均匀分散在铝基体中,界面结合良好,未发现界面反应产物,通过透射电镜观察到少层石墨烯的存在。1%～15%Gr含量的Gr/6061Al复合材料的致密度均高于90%;复合材料的致密度,硬度和摩擦系数随着片层石墨含量的增加都逐渐降低;随着烧结温度的提高,10%Gr含量的Gr/6061Al复合材料的致密度和硬度均得到提高。与1%和25%Gr含量的Gr/6061Al复合材料相比,其他Gr含量的复合材料的磨损率均较高。
The graphite sheet(Gr)/6061 Al composites with Gr content of 1%～25%(volume fraction) were prepared by vacuum hot-pressure sintering. The nano-aluminum powders were adopted as cladding materials on the surface of graphite sheet to improve the dispersal uniformity of graphite sheet within aluminum matrix. The graphite sheet disperses uniformly in the aluminum matrix, and the interface between aluminum and Gr is well without interfacial reaction product being found. Few layer grapheme is observed by transmission electron microscopy(TEM). The relative densities of the Gr/6061 Al composites with 1%～15% Gr content are all higher than 90%. The relative density, hardness and coefficient of friction(COF) of the samples decrease with the increasing of graphite content. However,, with the increasing of the sintering temperature, the relative density and hardness of the Gr/661 Al composite with 10% Gr increase. The wear rate of the samples with Gr content of 5%, 10% and 15% are all higher than that with 1% and 25% Gr.
The graphite sheet(Gr)/6061 Al composites with Gr content of 1%～25%(volume fraction) were prepared by vacuum hot-pressure sintering. The nano-aluminum powders were adopted as cladding materials on the surface of graphite sheet to improve the dispersal uniformity of graphite sheet within aluminum matrix. The graphite sheet disperses uniformly in the aluminum matrix, and the interface between aluminum and Gr is well without interfacial reaction product being found. Few layer grapheme is observed by transmission electron microscopy(TEM). The relative densities of the Gr/6061 Al composites with 1%～15% Gr content are all higher than 90%. The relative density, hardness and coefficient of friction(COF) of the samples decrease with the increasing of graphite content. However,, with the increasing of the sintering temperature, the relative density and hardness of the Gr/661 Al composite with 10% Gr increase. The wear rate of the samples with Gr content of 5%, 10% and 15% are all higher than that with 1% and 25% Gr.
引文
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[10]Chen J K,Huang I S.Composites Part B:Engineering[J],2013,44(1):698
[11]Liuyi Zhuozi(刘依卓子),Guo Hong(郭宏),Han Yuanyuan(韩媛媛)et al.Chinese Journal of Rare Metals(稀有金属)[J],2018(3):1
[12]Han Jiandong(韩建栋),Wu Jingfeng(吴景峰).Semiconductor Technology(半导体技术)[J],2010(8):797
[13]Liu Weigao(刘维镐),Chen Dianling(陈电玲),Jia Xianjun(贾宪军)et al.Light Alloy Fabrication Technology(轻合金加工技术)[J],2000,28(9):38
[14]Jeon C,Jeong Y,Hong S et al.Journal of Mechanical Science and Technology[J],2014,28(2):499
[15]Liu Zhengang(刘振刚),Yao Guangchun(姚广春),Liu Yihan(刘宜汉)et al.Materials Review(材料导报)[J],2009(2):57
[16]Tang Y,Liu L,Li W et al.Applied Surface Science[J],2009,255(8):4393
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[25]Wang Qingnian(王庆年),Sui Zhongxiang(隋忠祥),Zhang Ming(张明)et al.Tribology(摩擦学报)[J],1997(1):90