During the process of passing through the atmosphere, the friction between the Shenzhou 13 return capsule and the atmosphere will generate a high temperature of more than 2,000 degrees, which is enough to melt most of the material on the earth. But why is our manned spacecraft still safe and sound? Follow our reporters to find out.
CCTV reporter Li Ning:We came to the birthplace of China’s aerospace industry, the China Academy of Launch Vehicle Technology, where we are going to find a magical material.
The material we are looking for today is the “heat-proof jacket” of the Shenzhou spacecraft’s return cabin. Now we see the heat-proof outsole of the Shenzhou spacecraft’s return cabin. This honeycomb-shaped heat-proof can be clearly seen on it. material, we need to take away heat by burning this heat-proof material, so as to ensure the safety of astronauts.
reporter:We can see that the color is not the same, right? Is this all heat resistant material?
Liang Xin, chief engineer of the special heat-proof structure for the return cabin of Shenzhou 13:Both of these are heat-resistant materials. This is our honeycomb-reinforced ablation heat-resistant material with a slightly lower density, and the density is relatively low. Honeycomb has a relatively large feature, which means that in the case of the same density, its strength is the highest, so this also means that we chose the honeycomb structure.
reporter:How many heat-proof materials have we developed for spacecraft?
Liang Xin, chief engineer of the special heat-proof structure for the return cabin of Shenzhou 13:We have developed more than 100 kinds of heat-resistant materials for Shenzhou. In order to maximize the performance of my materials, a lot of work has to be done. It provided a very good foundation for our follow-up development of heat-proof materials, so later like Chang’e, including like Mars, our development process was accelerated, because Shenzhou laid a good foundation.
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责编：丁玉冰 ]