碳含量对CrN:a-C多相复合涂层摩擦学性能的影响  

Effect of Carbon Content on Tribological Properties of CrN:a-C Multiphase Composite Coatings

作　　者：马飞 王闯 郭武明 史祥东 孙建颖 庞刚 MA Fei;WANG Chuang;GUO Wuming;SHI Xiangdong;SUN Jianying;PANG Gang(State Key Laboratory of Engine Reliability,Weifang 261061,China;Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Weichai Power Co.Ltd.,Weifang 261061,China)

机构地区：[1]内燃机与动力系统全国重点实验室,潍坊261061 [2]中国科学院宁波材料技术与工程研究所、中国科学院海洋新材料与应用技术重点实验室、浙江省海洋材料与防护技术重点实验室,宁波315201 [3]潍柴动力股份有限公司,潍坊261061

出　　处：《材料研究学报》2024年第4期297-307,共11页Chinese Journal of Materials Research

基　　金：内燃机可靠性国家重点实验室开放基金(SKLER-201902)。

摘　　要：分别以Cr靶、N_(2)与C_(2)H_(2)作为Cr源、氮源与碳源,采用多弧离子镀技术制备CrN:a-C多相复合涂层,通过调节C_(2)H_(2)的流量改变涂层中碳的含量,使用X射线衍射仪(XRD)、拉曼光谱(Raman)、场发射扫描电镜热场(FE-SEM)、多功能摩擦磨损试验机等手段研究了碳含量对其组成结构、机械性能以及摩擦学性能的影响。结果表明:随着涂层内碳含量的提高涂层非晶碳的结构特征逐渐明显和涂层致密性降低,使机械性能降低但是其结合力和硬度仍然比较高。在干摩擦和5W-30润滑油环境中涂层均呈现出较好的低摩擦与低磨损特性。碳含量和摩擦产物的影响,使摩擦系数和磨损率在两种环境中均先提高后降低。在C_(2)H_(2)流量为120 sccm的条件下在干摩擦和润滑油环境中涂层的摩擦系数分别为0.33和0.12,磨损率分别为1.3×10^(-5)mm^(3)/(N·m)和7.4×10^(-6)mm^(3)/(N·m),可为摩擦副部件提供有效的减磨抗磨防护作用。Multiphase composite coatings CrN:a-C were deposited by multi-arc ion plating technology with Cr target,gases N_(2)and C_(2)H_(2)as source of Cr,N and C,respectively.The carbon content of the coating can be regulated by adjusting the C_(2)H_(2)flow rate.The effect of carbon content on the composition,structure,mechanical properties,and tribological properties of CrN:a-C multiphase composite coatings was assessed by means of X-ray diffractometer(XRD),Raman spectroscope,field emission scanning electron microscope(FE-SEM),and multifunctional friction-wear tester.The results indicated that with the increase of carbon content,the structural characteristics of amorphous carbon of the coating were gradually obvious,while the compactness of the coating was decreased,which leads to the gradual decrease of the mechanical properties,but it still shows a higher hardness and adhesive strength to the substrate.CrN:a-C multiphase composite coatings exhibited better characteristics of low coefficient of friction and low wear rate during dry friction and friction in the presence of lubricating oil 5W-30,which are affected by carbon content and friction products.The coefficient of friction(CoF)and wear rate increase first and then decrease in conditions of dry friction and friction with lubricating oil respectively.Among others,the coating prepared by the C_(2)H_(2)flow rate of 120 sccm presented CoF of 0.33 and 0.12,and wear rate of 1.3×10^(-5)mm^(3)/(N·m)and 7.4×10^(-6)mm^(3)/(N·m)in conditions of dry friction and friction with lubricating oil respectively,which was expected to provide effective anti-friction and anti-wear protection for friction pair.

关 键 词：材料表面与界面 CrN:a-C多相复合涂层 氮化铬 非晶碳 摩擦学性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]