Application of boron carbide in other engineering ceramic materials?
Boron carbide is used to make nozzles for sandblasting machines, nozzles for high-pressure water cutting machines, sealing rings, ceramic tools and molds, etc. Features: The boron carbide nozzle has the characteristics of wear resistance and high hardness, and will gradually replace the known sandblasting nozzles of cemented carbide (tungsten steel) and silicon carbide, silicon nitride, alumina, zirconia and other materials. In addition, the application of boron carbide in the field of composite ceramics: boron carbide is a compound with strong covalent bonds, and the plasticity of boron carbide is very poor, the grain boundary resistance is very large, and it is difficult to obtain a dense sintered body, except for some special In other cases, such as microcrystalline boron carbide gas dynamic bearing materials and boron carbide blocks used as neutron absorption materials in atomic energy reactors, the sintering behavior of boron carbide is usually improved by adding sintering aids to obtain cheaper , Practical boron carbide products. What is more noteworthy is that B4C-SiC composite ceramics can better maintain the excellent physical and mechanical properties of boron carbide ceramics while reducing the sintering conditions of boron carbide ceramics. B4C-SiC ceramics are considered to be a kind of high-temperature corrosion-resistant and wear-resistant materials with wide application prospects, and have been applied in the fields of industrial nozzles, pump sealing and hot extrusion dies.
In recent decades, due to the rapid development of science and technology, especially the rapid development of electronic technology, space technology, and computer technology, materials with special properties are urgently needed. Boron carbide has become an important member of the high-grade ceramic family because of its many excellent properties. At present, many problems related to the preparation of boron carbide powder and the sintering of boron carbide ceramic materials have been solved. In the field of materials in the future, boron carbide will surely occupy an important position with its excellent properties.
