高级检索

    发动机涡轮叶片热障涂层陶瓷层及其制备技术的研究现状

    Current Status of Ceramic Layers of Thermal Barrier Coatings for Engine Turbine Blades and the Preparation Technology

    • 摘要: ZrO2基陶瓷、稀土锆酸盐、铝酸盐、钽酸盐、铌酸盐、钙钛矿、A6B2O17陶瓷等常被用作发动机涡轮叶片热障涂层的陶瓷层材料,可以有效降低涡轮叶片金属基体的工作温度,从而提高发动机的许用工作温度,延长叶片使用寿命。对上述热障涂层陶瓷层材料的微观结构及性能提升的研究进展进行了综述,总结并对比了大气等离子喷涂和电子束-物理气相沉积等制备方法。指出未来研究方向应集中在:通过稀土掺杂改性等方法使陶瓷材料的热膨胀系数与叶片基体材料更好地匹配,同时提高其断裂韧性,降低热导率;对现有制备方法进行参数调控或不同工艺融合等优化,从而获得成本低且性能稳定的热障涂层陶瓷层。

       

      Abstract: ZrO2 based ceramics, rare earth zirconates, aluminates, tantalates, niobates, perovskites and A6B2O17 ceramics, are often used as ceramic layer materials of thermal barrier coatings for engine turbine blades. These layers can effectively reduce the working temperature of the metal substrate of the turbine blades, thereby increasing the allowable working temperature of the engine and extending the service life of the blades. The research progress on the microstructure improvement and performance enhancement of the aforementioned ceramic layer materials for thermal barrier coatings is reviewed, and preparation methods of atmospheric plasma spraying and electron beam-physical vapor deposition are summarized and compared. It is pointed out that future research directions are focused on the improvement of matching thermal expansion coefficients between ceramic materials and the blade substrate material by rare earth doping modification, and on the increase of the fracture toughness and the decrease of thermal conductivity of the ceramic materials. The existing preparation methods should be optimized by parameter adjustments or integration of different processes, so as to obtain cost-effective and stable ceramic layers of thermal barrier coatings.

       

    /

    返回文章
    返回