摘要
对片层石墨表面进行化学镀镍处理,采用真空热压法制备镀镍片层石墨/铝复合材料。研究了镀镍片层石墨/铝复合材料的微观结构、摩擦磨损性能和热导率,并将其与球形石墨/铝复合材料进行比较。结果表明,镀镍能有效改善片层石墨和铝的界面结合;当石墨质量分数≥20wt%时,镀镍片层石墨/铝复合材料具备更低的摩擦系数和更好的散热能力;当石墨质量分数为30wt%时,镀镍片层石墨/铝复合材料摩擦系数低至0.16,其磨损量是球形石墨/铝复合材料磨损量的1/3左右,其热导率高达381 W/(m·K),是球形石墨/铝复合材料热导率的2.9倍,综合性能突出。
Electroless nickel plating on the surface of lamellar graphite was carried out. Nickel coated graphite/aluminum composites were prepared by vacuum hot pressing. The microstructure, friction and wear properties and thermal conductivity of nickel coated graphite/aluminum composites were studied, which were compared with those of spherical graphite/aluminum composites. The results show that nickel plating can effectively improve the interfacial bonding between graphite and aluminum. When the mass fraction of graphite is more than 20wt%, nickel-coated graphite/aluminum composites have lower friction coefficient and better heat dissipation. When the graphite mass fraction is 30wt%, the friction coefficient of the nickel-plated sheet graphite/aluminum composite material is as low as 0.16, and the wear amount is about 1/3 of the wear amount of the spherical graphite/aluminum composites. The thermal conductivity of 381 W/(m·K) is 2.9 times of that of spherical graphite/aluminum composites, and the comprehensive properties are outstanding.
作者
宁越洋
童幸生
江南
薛晨
马洪兵
NING Yueyang;TONG Xingsheng;JIANG Nan;XUE Chen;MA Hongbing(Department of Mechanical and Electrical Engineering,Jianghan University,Wuhan 430056,China;Ningbo Institute of Materials Technology&Engineering,China Academy of Sciences,Ningbo 315200,China)
出处
《热加工工艺》
北大核心
2022年第10期65-68,共4页
Hot Working Technology
基金
国家自然科学基金项目(51501209)
宁波自然科学基金项目(2017A610010)
江汉大学科研创新基金项目(JHDXYJS17HG012)。
关键词
石墨/铝
化学镀镍
摩擦系数
热导率
固体自润滑材料
graphite/aluminum
electroless nickel
friction coefficient
thermal conductivity
solid self lubricant material
作者简介
宁越洋(1994-),男,湖北武汉人,硕士研究生,研究方向:高导热铝基复合材料,E-mail:2991867932@qq.com;通讯作者:童幸生(1956-),男,湖北武汉人,教授,博士生导师,研究方向:新型材料的制备与改性及成形技术,E-mail:xstong@jhun.edu.cn。
