Explanation
A carbide of boron, molecular formula Rf. After absorbing neutrons, the reaction produces helium and lithium, and the volume of the product is about 20 times larger than that of boron. The irradiation swelling problem of boron containing materials is its main disadvantage. Is boron carbide hexagonal rhombic crystal system? There are twelve boron atoms at each corner of the unit cell of crystal, so lithium and even helium atoms can be retained in the crystal. It can be predicted that B4C will be stable under irradiation when the boron burn up is less than 8%. Synthesized by vapor deposition or electrothermal method. It can be made of powder, briquette or dispersed in other matrix and used in various reactors. boron carbide has high hardness and high strength. It is also used as abrasive and anti-corrosion materials.
Classification
Energy Materials -> Nuclear energy materials