Can withstand 3000 ° C ablation ceramic coating and composite materials available

The key components of the "escort" hypersonic vehicle will have reliable new materials . Recently, the Institute of Powder Metallurgy of Central South University said that the team of the State Key Laboratory of Powder Metallurgy, Chinese Academy of Engineering, Huang Boyun, developed a new type of ceramic coating and composite material resistant to 3000 °C ablation, which has superior ablation resistance. And resistance to thermal shock, causing widespread international attention.

The hypersonic vehicle has a top speed of 6,120 kilometers per hour. “At this speed, it takes about 2 hours to fly from Beijing to London.” The team said that the high-speed flight, the key structural components of the aircraft, such as the nose cone of the aircraft, the leading edge of the wing, etc., must withstand severe air friction and The hot air flow up to 2000 ° C ~ 3000 ° C impact without being destroyed. “Our newly synthesized ultra-high temperature ceramic coatings and composites provide better protection for these components.”

Xiong Xiang said that the new ceramic coating modified carbon/carbon composite consists of quaternary boron-containing single-phase carbide composed of zirconium, titanium, carbon and boron. It has a stable carbide crystal structure, mainly through infiltration. The process is obtained by introducing a multi-ceramic phase into a porous carbon/carbon composite. The ultra-high temperature ceramic has both high temperature adaptability of carbide and anti-oxidation property of boride, so that it has superior ablation resistance and thermal shock resistance.

It is reported that this is the world's first synthesis of the quaternary boron-containing carbide single-phase ultra-high temperature ceramic material, and made into a coating, perfect "fusion" with carbon-carbon materials. In the current field of new materials, the mainstream is the study of mixed materials in binary compound systems.