采用HVOF技术喷涂金属粘结层NiCrAlY作为底层,采用APS技术喷涂纳米氧化锆陶瓷层作为面层,制备高性能热障涂层.设计正交试验优化HVOF和APS工艺,分析了优化工艺制得的热障涂层的微观形貌及性能.分析表明,NiCrAlY涂层孔隙率小于2%,纳米氧化锆涂层孔隙率为15%.通过胶膜法测得纳米氧化锆热障涂层喷涂态的结合强度为30.4 MPa,且涂层经1100℃水淬50次后表面无宏观裂纹,热生长氧化层为致密的Al2O3.
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