某种维形防热涂层技术在飞行器表面结构上的应用研究

Study on the application of maintained heat-resistant coating in some aircraft surface structure

首次针对维形防热涂层技术在飞行器表面结构上的应用,分别开展拉剪实验、石英灯加热实验以及高低温与湿热实验。在铝合金、合金钢实验件上分别喷涂两种底漆涂料HTL-92、H61-83,对比分析不同底漆涂料与不同金属基体的结合性能;在涂覆两种底漆涂料HTL-92、H61-83的铝合金实验件上喷涂防热涂料TR-48,对比分析不同底漆涂料与防热涂料的结合性能;在铝合金、合金钢实验件上分别喷涂HTL-92底漆涂料、TR-48防热涂料、H61-32面漆涂料,研究所采用的防热层对金属基体的热防护性能;利用3个喷涂不同厚度防热层的结构实验件,研究所采用的防热层的环境适应性。研究结果表明:铝合金和合金钢金属基体涂覆由HTL-92底漆涂料、TR-48防热涂料、H61-32面漆涂料组成的防热层时,结合强度高且没有裂纹、鼓泡或脱落情况出现,说明这种防热层既能满足飞行器飞行过程中的防热要求又能维持表面结构良好的气动外形。

In this research,a set of stringent experiments, including the tensile-shear tests, heating tests with quartz lamp and high-low thermal-humidity tests, are carried out to investigate the application of maintained heat-resistant coating to the aircraft surface structures. The performance of the heat-resistant coating on shielding the metallic matrix and the environmental adaptation of the coating are studied by the elaborated experiments, which are developed to evaluate the binding ability between different primers and metallic matrixes, and between different primers and heat-resistant coatings. The results demonstrate that when the aluminum alloy matrix and steel alloy matrix are covered by the heat-resistant layer composed of HTL-92 primer,TR-48 heat-resistant coating and H61-32 top-coat, the requirement for heat resistance of the aircraft in flight can be satisfied and the excellent aerodynamic shape can be maintained.