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针对铝合金基材设计了ZrO_2陶瓷涂层,采用976 nm连续波激光对样品的抗激光性能进行了测试。基材厚度为2.5 mm,涂层厚度为0.3 mm,实验测试时样品前表面加载了0.3 Ma切向空气流。记录了辐照区域后表面测点的温度变化情况,测量了未辐照区与辐照区的反射率谱,并进行了XPS成分分析。结果表明:平均功率密度700 W/cm~2的激光辐照60 s样品没有熔化;辐照区域颜色变白,对近红外光的反射率变大。颜色变白的原因可能是涂层表面沾染的含碳化合物在激光辐照过程中被热解或气化,这与XPS检测结果相一致。
The ZrO_2 ceramic coating was designed for the aluminum alloy substrate. The anti-laser performance of the sample was tested by 976 nm CW laser. The substrate thickness was 2.5 mm and the coating thickness was 0.3 mm. The front surface of the sample was loaded with 0.3 Ma tangential air flow during the test. The change of temperature at the measuring point of the back surface of the irradiated area was recorded. The reflectance spectra of the irradiated area and the unirradiated area were measured. The XPS analysis was carried out. The results show that the samples irradiated by laser with an average power density of 700 W / cm ~ 2 do not melt for 60 s. The color of irradiated area becomes white and the reflectivity to near infrared light becomes larger. The reason for the whiteness of the color may be that the carbon compound contaminated on the surface of the coating is pyrolyzed or gasified during the laser irradiation, which is consistent with the XPS test result.