Sintering and Application of Boron Carbide Ceramics
Boron carbide ceramics are important wear-resistant and high-hardness structural ceramic materials in new ceramics. Since both boron and carbon are non-metallic elements, and the atomic radius is close, the combination method is different from that of ordinary compounds, so boron carbide ceramics have many unique and excellent properties such as high melting point, high hardness, low density, wear resistance and corrosion resistance. It is used in many fields such as national defense, nuclear energy, aerospace, industry, wear-resistant technology and so on.
Boron carbide ceramics can be densified and sintered through effective additives, appropriate temperature and pressure conditions. According to the different reaction principles, raw materials and equipment used to synthesize boron carbide powder, the industrial preparation methods of boron carbide powder mainly include high-temperature self-propagating synthesis method, carbon tube furnace, electric arc furnace carbothermic reduction method, and in recent years, laser has also appeared. Chemical vapor reaction method, sol-gel carbothermal reduction method, etc.