【摘要】 利用多弧离子镀技术在TiAl合金表面制备镀铝层,并进行720℃×4 h高温扩散处理。采用SEM、EDS和XRD分析了膜层的显微组织、化学成分及其相组成,测试了其显微硬度和耐磨性。结果表明:TiAl合金表面离子镀铝后,形成致密的纯铝层;经扩散处理后,膜层中纯铝相消失,形成了表面氧化层Al2O3和中间扩散层TiAl3,膜层硬度明显增加,显著提高了TiAl合金基材的抗高温摩擦磨损性能。更多还原

【Abstract】 Aluminum films were deposited on TiAl alloy by multi-arc ion plating(MAIP) and subsequently diffusion-treated under 720 ℃ for 4 h.The microstructure,chemical composition and phases of the films were analyzed by SEM,EDX and XRD.The microhardness and high temperature friction and wear behavior of the films were tested.The results show that the multi-arc ion plating aluminum films are compact and consist of Al.The aluminium films are transformed to the films composed of outer Al2 O3 layer and inner TiAl3 layer after diffusion treatment,and microhardness and high temperature wear resistance of the films are improved obviously.更多还原