Cr-Al-N涂层的热稳定性及力学性能研究

摘要

借助XRD、SEM、EDX、纳米压痕、氧化实验和切削实验研究了采用阴极弧蒸发技术制备的Cr-Al-N涂层的热稳定性、高温抗氧化性能和力学性能.研究表明:Cr0.32Al0.68N涂层为面心立方结构;Cr0.32Al0.68N在高温时会发生向其稳定相h-AlN和c-Cr发生转变,其中Cr的生成由中间生成物Cr2N过渡完成;Cr0.32Al0.68N涂层由于高的热稳定性和高温抗氧化性能,其切削性能优于普通的Ti-Al-N涂层.%The thermal stability, oxidation resistance and mechanical properties of Cr-Al-N coating coated by cathodic arc evaporation were characterized via EDX, XRD, SEM, nano-indentation, oxidation experiment and cuting test.The results show that the Cr0.32Al0.68N coating exhibits face-centered cubic structure.The Cr0.32Al0.68N coating transforms into their stable phases of h-AlN and c-Ct involving a middle phase of h-Cr2N.The Cr0.32Al0.68N coated insert behaves better cutting performance due to its higher thermal stability and oxidation resistance compared with Ti-Al-N coated insert.