According to CCTV news, in the process of crossing the atmosphere, the Shenzhou 13 return capsule and the atmosphere friction will produce a high temperature of more than two thousand degrees, enough to melt most of the material on the earth, but why can our manned spacecraft still be safe and sound? Follow our reporter to find out.
Li Ning: We came to the birthplace of China's aerospace industry, the China Academy of Launch Vehicle Technology, and we are going to look for a magical material here.
The material we are looking for today, the "heat jacket" of the Shenzhou spacecraft return capsule, and now we see the heat-proof outsole of the Shenzhou spacecraft return capsule, on which we can see this honeycomb-like heat-proof material very obviously, and we need to take away the heat by burning this heat-proof material, thereby ensuring the safety of astronauts.
Reporter: We can look at its color is not the same, right? Is this all heat-proof material?
Liang Xin, chief engineer of the shenzhou 13th return capsule heat protection structure special project: For these two are heat-proof materials, this belongs to our honeycomb-enhanced ablation heat-proof material with a slightly lower density, and the density is relatively low. The honeycomb has a relatively large feature, which means that in the case of the same density, its strength is the highest, so this is also to say 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 of the Shenzhou No. 13 return capsule: We have developed more than 100 kinds of heat-proof materials for Shenzhou, and in order to raise the performance of my materials to the extreme, a lot of work has to be done. It provides a very good foundation for the development of our follow-up heat-proof materials, so later like Chang'e, including mars, our development process has accelerated, because there is a good foundation for Shenzhou.
Edited by Linzhi Sun