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首页> 美国卫生研究院文献>Materials >Tribological Behavior of Copper–Graphite Composites Reinforced with Cu-Coated or Uncoated SiO2 Particles
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Tribological Behavior of Copper–Graphite Composites Reinforced with Cu-Coated or Uncoated SiO2 Particles

机译：铜包覆或未包覆的SiO2颗粒增强的铜-石墨复合材料的摩擦学行为

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Copper–graphite composites reinforced with SiO2 particles were fabricated by powder metallurgy technique. Electroless copper plating was introduced to improve the interfacial bonding between SiO2 particles and copper matrix. The microstructure, density, and hardness of the composites were characterized. The tribological properties, such as friction coefficient and wear rate of the composites, were studied using a pin-on-ring tribometer. The results show that the hard SiO2 can restrict the severe plastic deformation and adhesion contact in the process of wear. At the same time, parts of SiO2 particles can be broken into fine particles during wear process, which is helpful for decreasing adhesion wear and abrasive wear. Therefore, the addition of SiO2 leads to increasing friction stability and friction coefficient, and decreasing wear rate. In addition, the electroless copper plating improves the interfacial bonding between SiO2 and copper matrix, which prevents separation of SiO2 from copper matrix and further increase tribological properties of the composites.
机译：用粉末冶金技术制造了用SiO2颗粒增强的铜-石墨复合材料。引入化学镀铜以改善SiO2颗粒与铜基体之间的界面结合。表征了复合材料的微观结构，密度和硬度。使用销钉环式摩擦计研究了复合材料的摩擦学性能，例如摩擦系数和磨损率。结果表明，在磨损过程中，硬质SiO2可以限制严重的塑性变形和附着力接触。同时，SiO2颗粒的一部分在磨损过程中会破碎成细颗粒，这有助于减少粘附磨损和磨料磨损。因此，SiO 2的添加导致摩擦稳定性和摩擦系数增加，并且磨损率降低。此外，化学镀铜改善了SiO2与铜基体之间的界面结合，从而防止了SiO2与铜基体分离，并进一步提高了复合材料的摩擦学性能。

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