Scheme of heat-shielding coating of the reusable thermal shield of the descent vehicle for return from low Earth orbit

摘要

The utility model refers to reusable thermal protective composite coatings that can be used in space technology. The technical result of the proposed utility model is the heat shield of the reusable spacecraft reusable thermal shield optimized to return the device from a low earth orbit (for example, from the International Space Station (ISS)). The technical result is achieved by the fact that the thermal protection coating scheme of the reusable heat shield of the descent spacecraft for return from the low earth orbit is characterized by the composition of the layers of the non-woven carbon skeleton and the silicon carbide matrix and refers to coatings of essentially anisotropic materials with different physicomechanical and thermophysical characteristics as layers, and the thickness of the material. In this case, for the return of the device from a low Earth orbit, the coating has three layers: an outer dense layer with a residual porosity of less than 5%, a 2 mm thick carbon-ceramic composite (UCMM) layer, a second layer of 50% porosity with a thickness of 15 mm and a third layer of a high-temperature fibrous heat insulator of the brand Saffil (manufactured by DuPont) with a thickness of 45 mm. 1 z.s. 4-yl, 4 yl.