Performance comparison of boron carbide, silicon carbide, and alumina ceramics
In terms of elastic modulus, the elastic modulus of alumina ceramics is around 350GPa, while the elastic modulus of silicon carbide and boron carbide materials is around 400GPa. The elastic modulus of reaction-sintered silicon carbide ceramics produced by Shanghai Ceramics Research Institute reaches 360 -380GPa, while the elastic modulus of silicon carbide sintered by the same reaction in British and American countries can reach more than 430GPa. It can be seen that the three main armor ceramic materials all have the characteristics of high elastic modulus.
In terms of hardness, boron carbide > silicon carbide > alumina. It is worth mentioning that tungsten carbide material is a key material for the production of cemented carbide. Compared with silicon carbide, the hardness of silicon carbide is 2 times that of tungsten carbide, the density is 1/5 of tungsten carbide, and the strength is maintained at 1400°C. Not falling.
In terms of wear resistance, boron carbide > silicon carbide > alumina. Data measured by the Powder Metallurgy Institute of Central South University show that the wear resistance of alumina ceramics is equivalent to 266 times that of manganese steel and 171.5 times that of high chromium cast iron. It can be seen that the high hardness and wear resistance of ceramic materials are much higher than wear-resistant steel and stainless steel.