离子注入剂量对镁合金表面钛膜的性能影响

Effect of Ion Implantation Dose on Properties of Titanium Film on Magnesium Alloy Surface

【目的】进一步提高AC91表面钛层的综合性能。【方法】采用离子注入技术研究了N离子注入剂量对镁合金表面Ti膜的力学和摩擦磨损性能的影响。【结果】随着N离子注入剂量的提高,镁合金表面Ti膜的显微硬度随之增大,这是由于表面Ti膜形成Ti/TiN复合涂层结构,摩擦磨损试验结果表明,N离子注入后摩擦系数降低,高剂量的N离子注入下摩擦系数进一步降低至0.299,摩擦试验前后磨损量失重最少,膜层的耐磨损性能得到提高。【结论】N离子注入可以有效提高镁合金表面钛层的综合性能,从而提高其防护效果。

[Purposes] To improve the comprehensive properties of titanium layer on AC91 surface.[Methods] The effects of N ion implantation dose on the mechanical and tribological properties of Ti film on magnesium alloy surface were investigated by ion implantation technique.[Findings] With the increase of N ion implantation dose,the microhardness of Ti film on magnesium alloy surface increases,which is due to the Ti/TiN composite coating structure formed by Ti film on the surface.The experimental results of friction and wear show that the friction coefficient decreases after N ion implantation,and the friction coefficient further decreases to 0.299 under high dose N ion implantation.The wear loss before and after friction test is the least,and the wear resistance of the film is improved.[Conclusions] N ion implantation can effectively improve the comprehensive properties of titanium layer on magnesium alloy surface,so as to improve its protective effect.