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Application of boron carbide

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Application of boron carbide

Source:
2018/03/27 14:01
[Abstract]:
Control of nuclear fissionBoron carbide can absorb a large number of neutrons without any radioactive isotopes, so it is an ideal neutron absorber in nuclear power plants, and neutron absorber is main

  Control of nuclear fission

  Boron carbide can absorb a large number of neutrons without any radioactive isotopes, so it is an ideal neutron absorber in nuclear power plants, and neutron absorber is mainly to control the rate of nuclear fission. Boron carbide is mainly a controlled bar in the nuclear reactor field, but sometimes it will be made to powder because of the increase in surface area.

  The 1986 Chernobyl nuclear accident in Russia, Zook a front air corps were all transferred to the east of Chernobyl, from -8 to -26 meters meters of each type of helicopter immediately into the air mission. When boron carbide is exhausted, ordinary sand begins to be put in. With the progress of the launch, flight has become much easier. After the helicopter dropped nearly 2000 tons of boron carbide and sand, the engineer finally announced that the chain reaction in the reactor stopped, and the total volume of the helicopter reached 5000 tons. [1]

  Abrasive material

  Boron carbide is a solid that is harder than SiC or WC, and long ago it had been used as a coarse grind material. Because of its high melting point, it is not easy to cast into artificial products, but it can be processed into a simple shape by melting the powder at high temperature. It is used for grinding, grinding, drilling and polishing of hard materials such as hard alloys, gems and so on.

  Coating coating

  Boron carbide can also be used as a ceramic coating for warships and helicopters. It has light weight and resists the ability of the armor piercing projectile to penetrate the hot press into the overall layer.

  injector

  In the military industry, it can be used as a gun nozzle. Boron carbide, hard wear-resisting, do not react with acid and alkali, high / low temperature, high pressure, the density is greater than or equal to 2.46g/cm3; the hardness is larger than 3500kgf

  2, the bending strength is more than 400Mpa, the melting point of 2450 DEG C. Because of boron carbide nozzle has more high hardness wear characteristics of boron carbide nozzles will gradually replace the hard alloy nozzle / known silicon nitride, silicon carbide, tungsten carbide and alumina, zirconia and other materials.

  Other

  Boron carbide is also used for the manufacture of metal borides and the smelting of sodium borate, boron alloy and special welding.