将纳米结构Al2O3、TiO2、SiO2、SiC粉体经液相喷雾造粒的方法,制备出适合等离子喷涂的球形复合粉体,采用等离子喷涂技术制备出含纳米结构的陶瓷涂层。通过水淬法,将涂层试样分别经500、700、900和1100℃加热并保温10min,然后投入冷水中以测量其抗热震能力,通过宏观和SEM照片加以观察,分析其失效的机理。试验结果表明,该纳米结构涂层在较低温度(<700℃)具有优良的抗热震性能。 The nanostructured Al2O3, TiO2, SiO2, SiC powders were spray-granulated by liquid phase to prepare spherical composite powders suitable for plasma spraying, and the ceramic coatings with nanostructures were prepared by plasma spraying. By water quenching method, the coated samples were heated at 500, 700, 900 and 1100 ℃ respectively for 10 min and then put into cold water to measure their thermal shock resistance. The macroscopic and SEM photographs were used to observe the failure mechanism . The experimental results show that the nano-structured coating has excellent thermal shock resistance at lower temperature (<700 ℃).