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以Ti、Al和Cr为靶材,采用阴极离子镀在YT14硬质合金刀具表面制备一层AlTiCrN涂层,通过扫描电镜、能谱仪和X射线衍射仪分析了其表面和界面形貌、化学元素组成和物相,并用线扫描和面扫描研究了涂层中化学元素在结合界面处扩散机理.用划痕法表征其界面层结合强度,对界面结合机理进行了讨论.AlTiCrN涂层的物相主要以AlN、CrN和TiN为主,涂层在(111)晶面具有很强的择优取向.涂层中Al、Ti、Cr和N原子数分数高于基体,在结合界面处呈阶梯状过渡分布,基体中C原子扩散进入TiN、AlN和CrN晶格点阵中,形成明显的扩散层.涂层结合界面为机械+扩散形式,其结合方式主要是由吸附结合、扩散结合和化合结合方式组成.划痕过程中涂层经历弹性变形、塑性变形和涂层剥离三个阶段,界面结合强度为59.2N.
AlTiCrN coatings were prepared by cathodic ion plating on the surface of YT14 cemented carbide tool with Ti, Al and Cr as targets. The surface and interface morphology of the alloys were analyzed by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Element composition and phase, and the diffusion mechanism of the chemical elements in the coating at the bonding interface was studied by line scanning and surface scanning. The bonding strength of the interface layer was characterized by scratching method and the interface bonding mechanism was discussed.AlTiCrN coating material The main phase is AlN, CrN and TiN, and the coating has a strong preferential orientation on the (111) crystal plane. The Al, Ti, Cr and N atomic numbers in the coating are higher than the matrix, Transitional distribution, the matrix C atoms diffuse into the TiN, AlN and CrN lattice lattice, forming a significant diffusion layer.The coating bonding interface is a mechanical + diffusion form, the combination is mainly by adsorption, diffusion and chemical binding The composition of the scratch coating process through the three stages of elastic deformation, plastic deformation and coating stripping, the interface bonding strength of 59.2N.