摘要
利用多弧离子镀技术在TiAl合金表面制备镀铝层,分别进行720℃×2 h和840℃×2 h高温扩散处理.采用SEM、EDS和XRD分析了膜层的显微组织及相组成,并测试了显微硬度和耐磨性.结果表明:扩散层由氧化表层和扩散内层组成,不含纯铝相;与基体相比,扩散层的表面显微硬度和耐磨性显著提高,其中840℃扩散层的耐磨性优于720℃的扩散层.
The Al films were deposited on a titanium aluminum alloy by multi-arc ion plating.The plated titanium aluminum samples were subsequently diffused at 720 ℃ and 840 ℃ for 2 h,respectively.The microstructures,compositions and phase constitutions of the two diffusion coatings were analyzed using Scanning Electron Microscopy（SEM）,Energy Dispersive Spectroscopy（EDS） and X-Ray Diffraction（XRD）.The microhardness and wear resistance were also measured.The results showed that the diffusion coatings were composed of outer oxide layer and inner diffusion layer,and no Al phase was found in the coatings.The diffusion coatings had higher microhardness and better wear resistance in comparison to the substrate,while the wear resistance of the coatings diffused at 840 ℃ was superior to the coatings diffused at 720 ℃.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2010年第4期409-413,共5页
Tribology
基金
国家基础研究发展计划项目(2007CB607603)的资助
关键词
钛铝合金
多弧离子镀
扩散
摩擦磨损性能
titanium aluminum alloy
multi-arc ion plating
diffusion
friction and wear behavior
