热障涂层隔热性能测试方法分析

分别利用4种不同的隔热性能测试方法,对氧乙炔火焰喷涂工艺制备的ZrO2陶瓷热障涂层的隔热性能进行了测试,通过红外测温仪和热电偶连接温度记录仪两种不同方式,测试试样金属基体温度,获得4组不同涂层厚度试样金属基体的温度变化曲线,并结合陶瓷涂层的服役工况对测试结果进行了分析,结果表明,测试方法不同,隔热性能测试所得数据也有所差异,但这4种测试方法均可不同程度的反映热障涂层的隔热效果及变化趋势,在接近实际服役工况条件下,可定性评估涂层隔热性能。

Analysis of Test Methods about Heat Insulation Capabilities of Thermal Barrier Coating

The insulation performance of the ZrO₂ ceramic thermal barrier coatings prepared by the oxyacetylene flame spraying process is tested by four methods. Temperature variation curves of the specimen substrate in four different sets of coating thickness are required by testing the temperature of specimen substrate through infrared thermometer and thermocouple connected to a temperature recorder, and the test results are analyzed with service conditions of ceramic coatings. The results show that, the data obtained by insulation performance vary with different test methods. The four test methods can reflect thermal barrier coating insulation effect and trends in different levels and qualitatively assess the performance of the coating insulation in conditions close to the actual service.