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    体积分数45%SiCp/6092Al复合材料与不同对磨副的摩擦磨损性能对比

    Comparison of Friction and Wear Properties of of 45 vol.% SiCp/6092Al Composite Against Different Counterparts

    • 摘要: 在载荷50 N下对体积分数45%SiCp颗粒增强6092铝合金(SiCp/6092Al)复合材料进行室温干摩擦滑动磨损试验,对磨副分别采用YG6硬质合金球和Si3N4陶瓷球,研究了复合材料在两种对磨副作用下的摩擦磨损性能。结果表明:与YG6硬质合金球对磨时,复合材料的平均摩擦因数与磨损率更低,摩擦因数更稳定。两种对磨副作用下的磨痕横截面均呈“U型”轮廓,与YG6硬质合金球对磨时的磨痕更浅更窄且轮廓平滑。两种对磨副均引发复合材料的界面分层磨损。YG6硬质合金作用下的磨损机制以微切削和塑性犁削为主,磨损过程相对连续平稳;Si3N4陶瓷作用下的磨痕表面萌生裂纹,并随裂纹扩展发生层状剥落,磨损机制为不连续且剧烈的剥层磨损。

       

      Abstract: Dry friction sliding wear tests at room temperature were conducted on a 45 vol.% SiC particle reinforced 6092 aluminum alloy (SiCp/6092Al) composite under a load of 50 N; YG6 cemented carbide balls and Si3N4 ceramic balls were utilized as counterparts. The friction and wear properties of the composite against these two counterparts. The results indicate that when grinding against YG6 cemented carbide balls, the composite exhibited a lower average friction coefficient, a lower wear rate, and more stable friction behavior compared to that against the Si3N4 ceramic balls. Wear scars under both counterparts displayed a "U-shaped" cross-sectional profile; while the scar generated against the YG6 cemented carbide balls was shallower, narrower, and smoother. Both counterparts induced interfacial delamination wear in the composite. The primary wear mechanism of the composite under the action of YG6 cemented carbide was micro-cutting and plastic ploughing, featuring a relatively continuous and stable wear process. Under the action of Si3N4 ceramic, cracks initiated on the wear scar, and layered spallation occurred with crack propagation, resulting in a discontinuous and severe delamination wear mechanism.

       

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