金属骨架陶瓷基复合材料涡轮导叶研究进展

金属骨架陶瓷基复合材料涡轮导叶(金属骨架陶瓷导叶)耐高温、耐腐蚀、密度小,且韧性好,解决了高温合金难以承受越来越高的涡轮前温度的难题。介绍了金属骨架陶瓷导叶的国内外研究背景,分析了该导叶工程应用的关键技术:认为通过改变陶瓷叶型与金属骨架沿周向的接触方式(柔性接触和点/线接触)可缓解二者的周向热变形协调,尽量减少陶瓷叶型与金属支撑板的刚性接触有益于径向热变形协调;金属与陶瓷基复合材料之间的连接必须解决化学相容性与物理匹配性的问题;探讨了该导叶的力学性能计算及试验验证方法。最后指出了金属骨架陶瓷导叶未来的研究方向。

Research Progress on Ceramic Matrix Composites Turbine Vane with Metal Core

The Ceramic Matrix Composites （CMC） turbine vane with metal core （ metal core ceramic vane） has high temperature resistance, corrosion resistance, small density and good flexibility which solves the problem of high temperature alloy enduring the more and more high turbine inlet temperoture. The domestic and international research background of the CMC turbine vane with metal core were introduced. The key technology of engineering application of vane was analyzed. The circular thermal deformation coordination were alleviated by changing the contacting method （flexibility contacting and point/line contacting） of the ceramic shell and the metal core. The rigid contacting of the ceramic shell and the metal supporting plate was benefit to the radial thermal deformation coordination. The connection between the metal and CMC would solve the chemical compatibility and physical matching. The mechanical properties calculation and test experimental verification methods were discussed. The future research direction of the ceramic vane with metal core were indicated.