N离子注入能量对TiC涂层的微观结构和耐磨性能的影响  

Effect of N Ion Implantation Energy on Microstructure and Wear Resistance of TiC Coatings

作　　者：窦忠宇 张愉 赵锦耀 张殿喜 DOU Zhong-yu;ZHANG Yu;ZHAO Jin-yao;ZHANG Dian-xi(School of Electronics and Information Engineering,Anshun University,Anshun 561000,China)

机构地区：[1]安顺学院电子与信息工程学院,贵州安顺561000

出　　处：《材料保护》2021年第11期124-128,共5页Materials Protection

基　　金：贵州省教育厅青年人才成长项目(2017281,2020134,2022040);贵州省高等学校大学生创新创业训练计划项目(S202010667061);安顺学院材料模拟与计算重点实验(201803)资助。

摘　　要：为提高WC-Co合金YG8表面的摩擦磨损性能,在其表面制备TiC涂层后,再通过N离子注入进行表面修饰,在一定的N离子注入剂量下,研究不同注入能量(20~50 kV)的N离子对WC-Co合金表面TiC涂层的微观结构和耐磨性能的影响。结果发现:N离子注入不仅可以有效提高TiC涂层与硬质合金基底的结合强度,而且可以降低其表面摩擦系数;XRD结果显示注入后有新相TiO_(2)生成,非晶碳和氧化物对涂层表面摩擦磨损性能的提高起积极作用;随N离子注入能量的增加涂层的膜/基结合力逐渐增大,其表面摩擦系数逐渐降低,但涂层的磨损截面面积先减小后增大,说明其耐磨损性能在提高且在注入能量为40 kV时最为显著。分析认为,TiC涂层摩擦磨损性能的提升不仅与TiC晶相的非晶化和新相的生成有关,而且与离子注入本身机制有关。In order to improve the friction and wear properties of WC-Co alloy,TiC coating was prepared on YG8 surface and then modified by ion implantation.The effects of different implanted energies(20~50 kV)of N ions on the microstructure and wear resistance of TiC coatings on WC-Co alloy were investigated at a certain dose of N ions implantation.Results showed that N ion implantation not only effectively improved the bonding strength of TiC coating and cemented carbide substrate,but also reduced its surface friction coefficient.XRD results showed that a new phase of TiO_(2)was formed after injection,and amorphous carbon and oxides played a positive role in improving the friction and wear properties of the coating surface.With the increase of N ion implantation energy,the film/substrate bonding strength of the coating increased gradually,and the surface friction coefficient decreased gradually.However,the wear cross section area of the coating decreased first and then increased,indicating that the wear resistance of the coating improved and was the most significant at the implantation energy of 40 kV.It was found that the improvement of the friction and wear properties of TiC coating was not only related to the amorphization of TiC crystal phase and the formation of new phase,but also related to the mechanism of ion implantation.

关 键 词：WC-CO硬质合金 TIC涂层 N离子注入 微观结构 摩擦系数 磨损性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]