CrAlTiN及CrAlTiSiN纳米多层复合涂层的制备及力学性能  

CrAlTiN and CrAlTiSiN Nanocomposite Coatings Deposited by Multi-arc Plasma Deposition

作　　者：付酮程[1] 闫少健[1] 田灿鑫[1] 杨兵[2] 黄志宏[1] 付德君[1] 

机构地区：[1]武汉大学物理科学与技术学院,武汉430072 [2]武汉大学动力与机械学院,武汉430072

出　　处：《中国表面工程》2013年第1期20-26,共7页China Surface Engineering

基　　金：科技部国际合作项目(2011DFR50580);中国博士后科学基金会项目(2011M501229)

摘　　要：以金属Cr和AlTi合金为靶材料,在沉积过程中引入SiH4气体,用自行设计的多靶阴极电弧离子镀系统在单晶硅和硬质合金衬底上沉积了CrAlTiN和CrAlTiSiN硬质涂层。通过X射线衍射(XRD)和透射电镜(TEM)分析涂层的组织和形貌,结果表明:衬底偏压和反应气体流量对膜层的力学性能有较大影响,在优化条件下得到CrAlTiN涂层的硬度为29GPa。且CrAlTiSiN涂层为CrSiN和AlTiSiN组成的纳米多层复合涂层,随着SiH4流量的增加,薄膜中的硅含量明显增加,在优化条件下,涂层的显微硬度达到37GPa,摩擦因数为0.58。刀具涂层检测试验表明,涂覆CrAlTiN涂层的铣刀使用寿命可提高3倍,而CrAlTiSiN涂层较CrAlTiN涂层还会进一步提高刀具使用寿命。CrAlTiN and CrAlTiSiN nanocomposite coatings were synthesized on cemented carbide and Si substrate through a homemade cathodic multiarc plasma deposition system with Cr and AlTi alloy targets. The structural characteristics, morphology were obtained by Xray diffraction （XRD）, scanning electron microscope （SEM）. Results show that the bias voltage and flow rate of reactant gas significantly affect mechanical properties of the films, and the microhardness of CrAlTiN reaches 29 GPa at optimized conditions.The CrAlTiSiN coatings consisting of multilayer composite with CrSiN and AlTiSiN from the figures of XRD patterns and TEM morphologies. With the increase of SiH4 flow rate, the content of Si elevats and the microhardness reaches the 37 GPa with fricition coefficient of 0.58 at the most optimized parameters. The cutting experiment illustrated that the milling cutter with CrAlTiN coatings is three times longer than that of common tools, while the CrAlTiSiN coatings can further improve the working life the cutter compared with the CrAlTiN.

关 键 词：多弧离子镀 CrAlTiSiN 纳米多层膜 显微硬度 摩擦因数 

分 类 号：TG174.444[金属学及工艺—金属表面处理]