摘要
In this paper,the properties of different low-density heat-resistant coating prescriptions were compared,and a heat-resistant coating with a density of 0.65 g/cm^(3),a tensile strength of 2.04 MPa,and a thermal conductivity of 0.126 W/(m·K)was obtained.The thermal performance of the coating was characterized by an oxygen-acetylene ablation test,a hot radiation test using a quartz lamp and in an arc-heated wind tunnel test.The results indicated that the low-density heat-resistant coating prescription has advantages of high temperature resistance,erosion resistance,ablative resistance and excellent heat resistance,which can satisfy the heat resistance requirements of new-generation launch vehicle fairings.The successful application of this heat-resistant coating technology resolved the problems of low efficiency and poor adhesive performance of the traditional hand-pasted cork process,and realized the rapid spray application of the thermal protection layer,effectively improved the manufacturing efficiency and production quality of the heat-resistant layer of new-generation launch vehicle fairings.
