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从界面角度出发,研究铜基粉末冶金摩擦材料中不同特征摩擦组元与基体组元形成的界面,并深层次探讨界面与摩擦表面、亚表面结构、摩擦磨损性能及磨损机理之间的关系。结果表明:Si C分别与基体Cu和Fe形成结合较差的机械结合界面和反应结合界面,高碳铬铁(HCC)与基体Cu形成扩散-机械结合界面;Si C与HCC均与基体形成含缺陷界面,而裂纹易沿界面缺陷形核扩展,使材料发生剥层磨损,促进机械混合层(MML)形成。而Si O2与铜基体形成紧密机械结合界面,使得材料表层Si O_2受摩擦力及正压力的反复作用发生破碎剥落,从而导致严重犁削磨损。
From the interface point of view, the interface between the different friction elements and the matrix elements in the copper-based powder metallurgy friction material is studied, and the relationship between the interface and the friction surface, subsurface structure, friction and wear properties and wear mechanism is discussed in depth. The results show that Si C and HCC form a diffusion-mechanical interface with Cu and Fe, respectively. Both Si C and HCC form a complex with the matrix Defect interface, and the crack easily along the interfacial defects nucleation, the material delamination wear, promote the formation of mechanical mixing layer (MML). However, Si O2 forms a close mechanical bonding interface with the copper matrix, causing repeated fracturing and spalling of Si O 2 on the surface of the material due to friction and positive pressure, resulting in severe plowing wear.