Carbide ultra-high temperature ceramics

Carbide ultra-high temperature ceramics mainly include zirconium carbide (ZrC), tantalum carbide (TaC) and hafnium carbide (HfC), as well as ceramic matrix composite materials or multiphase materials based on them. The melting point of these three substances is above 3000°C, and they have excellent thermochemical stability and physical properties, including high elastic modulus, high hardness, low saturated vapor pressure, moderate thermal expansion rate and good thermal shock resistance, etc. maintain high strength. Moreover, its application in the aerospace field as a high-temperature anti-oxidation ablation coating technology has also attracted widespread attention from various countries. It is an external coating protection method. The protection principle is to prepare various coatings to make materials and oxidation The ablative environment is isolated, preventing the carbon and oxygen from reacting.