论文部分内容阅读
采用非平衡磁控溅射离子镀技术在铝合金表面分别制备了以Cr和Al为打底层,Cr-C和A1-Cr-C为过渡层的Cr/Cr C/类石墨碳(GLC)和Al/Al-Cr-C/GLC复合镀层,并与无打底层制备GLC镀层对比,系统研究了不同镀层微观结构、膜基结合力及摩擦学性能,结果表明,铝合金基体表面Cr打底层呈柱状晶生长,Cr/C过渡层无柱状晶特征,且随过渡层增厚,富Cr区域减少,实现了成分的梯度变化:A1打底层与铝合金基体间为一个整体,没有明显界面;Al Cr-C过渡层的成分也呈梯度变化;采用不同打底层和过渡层时.GLC层均为非晶态结构.较无打底层制备GLC镀层,Cr/Cr-C/GLC和Al/Al-Cr-C/GLC复合镀层与铝合金基底间的膜基结合力显著增强,以Al为打底层的复合镀层的失效临界载荷最大.磨损实验中,在不同载荷条件下2种复合镀层均具有低的摩擦系数.
Cr / Cr C / graphite-like carbon (GLC) with Cr and Al as underlying layers and Cr-C and Al-Cr-C as transition layers were prepared on the surface of aluminum alloy by unbalanced magnetron sputtering Al / Al-Cr-C / GLC composite coatings. Compared with the non-primer GLC coatings, the microstructure, film-based adhesion and tribological properties of different coatings were studied systematically. The columnar grain growth and the Cr / C transitional layer have no columnar grain. With the thickening of the transitional layer, the Cr-rich region is reduced, and the gradient of the composition is realized. The Al layer and the Al alloy basement are monolithic with no obvious interface. Al The composition of Cr-C transitional layer also changes with the gradient. When different under-layers and transitional layers are used, the GLC layers are all amorphous. Compared with the unpolymerized GLC coatings, Cr / Cr-C / GLC and Al / Al- Cr-C / GLC composite coating and aluminum alloy substrate between the base film significantly increased the binding force to Al as the underlying composite coating has the highest critical load of failure in the wear test, the two composite coatings under different load conditions have a low The coefficient of friction.