When the spacecraft returns to the cabin and violently rubs against the atmosphere, it will generate thousands of degrees of high temperature on the surface of the cabin. If the heat protection problem is not solved, the spacecraft will burn to ashes before landing, and the safety of the astronauts cannot be guaranteed. The Chinese scientific research team has spent 15 years developing 900 formulas and successfully developed a heat-insulating material, so that the temperature inside the spacecraft does not exceed 30 degrees when the temperature on the surface of the spacecraft is as high as 2000 degrees Celsius. It is with these scientists who have paid silently on the front line that the high reliability of the heat-proof materials for the Shenzhou spacecraft has been achieved.
Researchers from the Institute of Aerospace Materials and Technology, China Academy of Launch Vehicle Technology, are going to introduce a material to you today. The name of this material is low-density ablation and heat protection material.
China's Shenzhou spacecraft uses honeycomb-reinforced low-density materials. At very high speeds, the surface temperature of the spacecraft is very high, and the atmosphere and the surface of the spacecraft will produce very strong friction.
The intense friction makes the surface temperature of the spacecraft reach more than 2000 degrees, and the entire loading process takes 530 seconds. However, there are astronauts in the Shenzhou spacecraft, and the temperature inside cannot exceed 30 degrees. This requires an efficient thermal protection material, which is this material.
This material will undergo a series of endothermic reactions of decomposition, chemical resistance, and sublimation in the process of high temperature, thereby taking away a lot of heat and protecting the internal structure.