涂层广泛应用于各类重要零部件表面以提升其使用寿命,研究涂层的力学性能是评价该项技术优劣程度的一个关键因素。采用真空离子镀膜技术在铝基复合材料表面制备TiAlN/Ti和TiN/Ti叠层涂层,并通过扫描电镜(Scanning Electron Microscopy,S...涂层广泛应用于各类重要零部件表面以提升其使用寿命,研究涂层的力学性能是评价该项技术优劣程度的一个关键因素。采用真空离子镀膜技术在铝基复合材料表面制备TiAlN/Ti和TiN/Ti叠层涂层,并通过扫描电镜(Scanning Electron Microscopy,SEM)、X射线衍射仪(X-Ray Diffraction,XRD)和纳米压痕测试仪对涂层的微观结构、物相组成和力学性能进行表征和分析。基于量纲分析理论推导出材料力学性能参数与纳米压痕加/卸载参量之间的量纲一函数关系,结合有限元模拟的方法,确定其具体表达式。通过建立叠层涂层的纳米压痕仿真模型,分析了残余压应力对叠层涂层拉伸性能的影响。结果表明,残余压应力可以提高叠层涂层的屈服强度。其中,TiN/Ti叠层涂层的残余压应力为-564 MPa,提高了31.25%的屈服强度;TiAlN/Ti叠层涂层的残余压应力为-871 MPa,提高了50%的屈服强度。此方法为定量分析涂层力学性能的影响因素提供了重要的理论和试验基础。展开更多
Thermal Barrier Coatings(TBCs)technology is key to improving the service temperature and the productivity of aircraft engines.The performance and failure life of TBCs are strongly influenced by surface integrity and m...Thermal Barrier Coatings(TBCs)technology is key to improving the service temperature and the productivity of aircraft engines.The performance and failure life of TBCs are strongly influenced by surface integrity and microstructure.Therefore,recognizing failure mechanisms and developing effective surface treatment processes are crucial for further improving the reliability and durability of TBCs.This paper explains the primary reasons for TBC failure,emphasizing on how integrity of surface and interface influences interfacial oxidation,high-temperature erosion,and Calcium-Magnesium-Alumina-Silicate(CMAS)corrosion.Furthermore,this paper completely and rigorously evaluates the research status of TBCs surface treatment processes,including the characteristics and effects of various processes,and describes the requirements and goals of pretreatment and post-treatment.In addition,a potential direction for the development and application of TBCs surface treatment is suggested.展开更多
基金the National Natural Science Foundation of China (Nos.52075362 and 51975399)the Central Government Guides Local Foundation for Science and Technology Development,China (Nos.YDZJSX2022A020 and YDZJSX2022B004).
文摘Thermal Barrier Coatings(TBCs)technology is key to improving the service temperature and the productivity of aircraft engines.The performance and failure life of TBCs are strongly influenced by surface integrity and microstructure.Therefore,recognizing failure mechanisms and developing effective surface treatment processes are crucial for further improving the reliability and durability of TBCs.This paper explains the primary reasons for TBC failure,emphasizing on how integrity of surface and interface influences interfacial oxidation,high-temperature erosion,and Calcium-Magnesium-Alumina-Silicate(CMAS)corrosion.Furthermore,this paper completely and rigorously evaluates the research status of TBCs surface treatment processes,including the characteristics and effects of various processes,and describes the requirements and goals of pretreatment and post-treatment.In addition,a potential direction for the development and application of TBCs surface treatment is suggested.
