Influence of Titanium on the Wear Properties of Graphene Reinforced Copper Matrix Composites
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摘要: 通过基体钛合金化的方法,热压烧结制备石墨烯增强铜基复合材料,采用往复式摩擦磨损测试其耐磨性,X射线衍射(XRD)分析物相,光镜、扫描电镜(SEM)和透射电镜(TEM)分析微观结构和磨损形貌,结果表明:铜/石墨烯界面形成的TiC纳米颗粒有利于增强界面结合力。掺有0.25%Ti的复合材料抗磨性能大幅提升,表现出较低的摩擦系数0.25和较小的体积磨损率10.5×10-5 mm3/(N·m)(仅为纯铜材料的22%);但过量的Ti会导致摩擦性能下降。Abstract: Graphene reinforced copper matrix composites were fabricated by titanium alloying and hot press sintering method.The tribological test was performed on a reciprocating tribometer.Phase was identified by X-ray diffraction(XRD) and microstructure and wear surface were determined by optical microscopy,scanning electron microscopy(SEM) and transmission electron microscope(TEM).The results show that interfacial TiC nanoparticles are beneficial to bonding graphene and copper together efficiently.Copper-graphene composite doped with 0.25% Ti exhibits improved anti-wear performance with a low friction coefficient of 0.25 and a small volume wear rate of 10.5×10-5 mm3/(N·m)(22% of that of pure copper).However,excessive titanium causes degradation of friction properties.
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Key words:
- copper matrix composite /
- Ti /
- graphene /
- microstructure /
- wear properties
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