摘要
为提高铝基材料耐磨性,采用化学镀铜、镀镍复合方法制备镍铜原子包裹石墨烯和镀碳纳米管,在Al-5Mg混合粉体中添加不同质量分数(0. 1%、0. 2%)的复合镀石墨烯,并在添加质量分数为0. 5%的复合镀石墨烯基础上,添加不同质量分数(0. 1%、0. 3%和0. 5%)的复合镀碳纳米管后,进行超声-电磁复合分散,通过真空热压烧结的方法,制备石墨烯及碳纳米管增强铝基复合材料。利用扫描电子显微镜对试样进行微观组织观察,利用能谱仪对其进行微区成分分析,采用摩擦磨损试验机测试试样摩擦系数和磨损量。研究结果表明:当添加质量分数为0. 5%的石墨烯和0. 5%的碳纳米管时,所制备的铝基复合材料基体上均匀分布着亮白的铝镍相和石墨烯及碳纳米管,局部有石墨烯及碳纳米管团聚现象,团聚的石墨烯及碳纳米管表面保留着复合镀后的镍和铜元素。铝基复合材料的摩擦系数及磨损量随着石墨烯及碳纳米管添加量的增加而明显降低,当加入质量分数为0. 5%的石墨烯和0. 5%的碳纳米管时,其摩擦系数降低至0. 14~0. 27之间。
In order to improve the wear resistance of aluminum-based materials,nickelcopper atom-encapsulated graphene and carbon nanotubes were prepared by the electroless copper plating and nickel-plating composite methods.Different amounts of composite plated graphene(0.1 wt%and 0.2 wt%)were added to Al-5 Mg mixed powders,different amounts of composite plated carbon nanotubes(0.1 wt%,0.3 wt%,and 0.5 wt%)were added based on 0.5 wt%of the composite plated graphene,and the ultrasonic-electromagnetic composite dispersion was performed.Then aluminum matrix composite materials reinforced with graphene and carbon nanotubes were prepared with the hot pressing sintering method.The microstructure of the sample was observed by scanning electron microscopy.The composition of the micro-area was analyzed by the spectrometer.The friction coefficient and the wear amount of the sample were tested by a friction and wear tester.The following results were obtained:when 0.5 wt%graphene and 0.5 wt%carbon nanotubes are added,bright white aluminum nickel phase and graphene and carbon nanotubes are uniformly distributed on the aluminum matrix composite substrate.Local agglomeration of graphene and carben nanotubes is observed.Nickel and copper elements after composite plating remain on the agglomerated graphene and carbon nanotubes.The friction coefficient and wear amount of aluminum matrix composites are significantly reduced with the addition of graphene and carbon nanotubes.When 0.5 wt%graphene and 0.5 wt%carbon nanotubes are added,the friction coefficient is reduced to the range between 0.14 and 0.27.
作者
尹冬松
陈客举
林靖祥
宋良
安勇良
YIN Dong-song;CHEN Ke-ju;LIN Jing-xiang;SONG Liang;AN Yong-liang(School of Materials Science and Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)
出处
《轻合金加工技术》
CAS
北大核心
2019年第9期59-65,共7页
Light Alloy Fabrication Technology
基金
哈尔滨市应用技术研究与开发项目(2017RAQXJ051)
黑龙江省博士后启动项目(LBH-Q16201)支持
关键词
石墨烯碳纳米管混杂
铝基复合材料
微观组织
耐磨性
graphene and carbon nanotube hybrid
aluminum matrix composite
microstructure
wear resistance
