电弧离子镀梯度（Ti，Al）N涂层的结构与机械性能研究

Structure and mechanical properties of gradient （Ti, Al） N coating prepared by arc ion plating

采用电弧离子镀（AIP）技术，在航空发动机压气机用1Cr11Ni2W2MoV不锈钢上沉积了TiN涂层、（Ti，Al）N涂层和梯度（Ti，Al）N涂层。运用带能谱的扫描电镜（SEM／EDAX）、电子探针（EPMA）、X射线衍射仪（XRD）、显微硬度仪、多功能摩擦磨损实验机等仪器和热震实验对上述涂层的结构、机械性能和基体与涂层的结合性能进行了研究。结果表明，梯度涂层的Al含量由涂层／基体界面向涂层表面逐渐增多，内层Al含量为3％（原子分数），外层Al含量为47％（原子分数）；梯度涂层具有Bl型（NaCl）单相结构和（220）择优取向；梯度涂层的硬度和耐磨与（Ti，Al）N涂层相近，且明显高于TiN涂层，结合性能优于（Ti，Al）N涂层。

TiN, gradient （Ti,Al）N and （Ti,Al）N coatings were deposited on 1Cr11Ni2W2MoV stainless steel for aero-engine compressor blades by arc ion plating. The microstructure, composition and mechanical properties of the deposited coatings were investigated using SEM/EDAX, EPMA, XRD, microhardness tester and multifunctional wear-testing system. The results show that the Al content in the gradient （Ti,Al）N coating increases gradually from the inner layer 3at% to the outer layer 47at%. All the deposited coatings have Bl structure and the gradient coating has a remarkable （220） preferred orientation. The microhardness and wear resistance of the gradient （Ti,Al）N coatings are similar to those of the （Ti,Al）N coatings, but much better than that of the TiN coatings. The hot cracking test shows that the adhesion property of the gradient （Ti,Al）N coating is much better than that of （Ti,Al）N coating.