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利用非平衡磁控溅射技术分别在镁合金基体上制备了以Al、Zr、W为过渡层的类石墨镀层。使用透射电子显微镜(TEM)对镀层的截面微观结构及相组成进行分析;使用划痕仪与摩擦磨损机测试镀层的膜基结合强度和摩擦性能。结果表明,镁基体-铝过渡层界面形成了镁和β-Mg17Al12相混合的合金相分层界面;镁基体-锆过渡底层界面形成了较好的局部连续界面;镁基体-钨过渡底层界面为钨粒子对镁合金基体注入形成约20 nm的镁-钨团簇混合界面层。镁基体表面铝、锆、钨掺杂碳镀层的膜基结合力分别为10.2、11.0、4.8 N。掺杂碳镀层工作层成分及结合力的不同,导致镀层耐磨减摩性能差异较大:掺铝碳镀层有较小摩擦系数,在0.1~0.18之间,且耐磨性较好,在球-盘实验结束后镀层依然没有失效;掺锆碳镀层大约在1600 s失效,摩擦系数急剧增大,失效前的摩擦系数在0.08~0.18之间,具有良好的减磨耐磨效果;掺钨碳镀层从一开始摩擦系数就急剧增加,在250 s左右完全失效,出现大面积剥落,在3种镀层中耐磨减摩效果最差。
The non-equilibrium magnetron sputtering technique was used to prepare graphite-like coatings with Al, Zr and W as transitional layers respectively on the magnesium alloy substrate. The microstructure and phase composition of the coating were analyzed by transmission electron microscopy (TEM). The scratch resistance and wear tester were used to test the bonding strength and tribological properties of the coating. The results show that the alloy phase interface of magnesium and β-Mg17Al12 phase is formed on the interface of magnesium matrix and aluminum transition layer, and the interface of magnesium matrix and zirconium transition layer forms a good local continuous interface. The interface of magnesium matrix and tungsten transition layer is The tungsten particles are injected into the magnesium alloy matrix to form a Mg-tungsten cluster mixed interface layer of about 20 nm. The film-based bonding strength of the aluminum, zirconium and tungsten-doped carbon coatings on the magnesium substrate was 10.2, 11.0 and 4.8 N. Doping carbon coating layer composition and the different bonding strength, resulting in wear-resistant coating antifriction performance differences: Al-doped carbon coating has a small friction coefficient between 0.1 ~ 0.18, and better wear resistance, the ball - After the experiment, the coating still has no failure. The zirconium-doped carbon coating failed at about 1600s, the friction coefficient increased sharply and the coefficient of friction before failure was between 0.08 ~ 0.18. Coating from the beginning of the friction coefficient increased sharply, completely failed in about 250 s, a large area of spalling, the three kinds of coating wear the most effective anti-friction.