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利用非平衡磁控溅射离子镀技术在铝基轴承合金表面沉积Cp/Al Sn复合镀层。采用原子力显微镜(AFM)和扫描电子显微镜(SEM)对镀层的微观形貌进行观察,并对镀层的维氏硬度和摩擦学性能进行了测试。结果表明,非平衡磁控溅射离子镀Cp/Al Sn镀层,当碳靶电流在0.2~0.8 A范围内,镀层呈等轴结构生长,随碳靶电流增大,镀层晶粒逐渐细化,且致密度增加;在Cp/Al Sn复合镀层中,Al、Sn和C元素分别以单质形式存在,且随掺碳量增加,Cp/Al Sn复合镀层非晶特征逐渐增强;随碳靶电流增加,镀层硬度增加,摩擦系数减小,电流为0.8 A时,镀层硬度最高为230 HV0.025。摩擦系数最低为0.09,磨损率先减小后增大,碳靶电流为0.4 A时,镀层的磨损率最低为6.6×10-16m3/(N·m),其磨损机制逐渐由粘着磨损转变为磨粒磨损。
The Cp / Al Sn composite coating was deposited on the surface of aluminum bearing alloy by unbalanced magnetron sputtering ion plating technology. The microstructure of the coating was observed by atomic force microscope (AFM) and scanning electron microscope (SEM). The Vickers hardness and tribological properties of the coating were tested. The results show that when the current of carbon target is in the range of 0.2-0.8 A, the coating grows in an equiaxed structure with unbalanced magnetron sputter ion plating of Cp / Al Sn coating. With the increase of the current of the carbon target, the grain size of the coating is gradually refined, In the Cp / Al Sn composite coatings, Al, Sn and C elements exist in the form of elements, respectively. With the increase of carbon content, the amorphous properties of Cp / Al Sn composite coatings gradually increase. , Coating hardness increases, the friction coefficient decreases, the current is 0.8 A, the coating hardness up to 230 HV0.025. The friction coefficient is the lowest, the wear rate decreases first and then increases. When the carbon target current is 0.4 A, the wear rate of the coating is the lowest 6.6 × 10-16m3 / (N · m), the wear mechanism gradually changes from adhesive wear to wear Grain wear.