First of all, carbon ceramics are completely different from the ceramics you understand. Carbon ceramics are a kind of material composed of carbon fiber and silicon matrix. The reason for the word ceramic should be because ceramics also contain a lot of silicon. In some physical properties, the two are somewhat similar, but the arrangement of these silicon atoms in the material and the bonds formed by the surrounding atoms are completely different, the strength is completely beyond your imagination, and it is not very brittle, so it will not break. Its performance is far better than that of ordinary brake discs, which are widely used in Formula 1 cars. In that case of very strong and very large acceleration, ordinary brake discs cannot be used after braking a few times. Expensive because the material itself is very expensive, from the material itself to manufacturing, the higher the performance requirements, the more accurate the thing, the material, manufacturing, labor costs are followed by high.