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Boron carbide ceramic for applications such as bulletproofing

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        Bulletproof armor field: Because boron carbide ceramic have lightweight, ultra-high hardness and high modulus of elasticity, it is the best material for bulletproof undershirts, bulletproof helmets and bulletproof armor, and it has begun to apply boron carbide ceramics as ceramic armor material. Compared with other bulletproof materials (such as SiC, Al2O3), B4C ceramics are lighter and harder, especially suitable for helicopter gunships and other aircraft as ballistic armor materials, can effectively resist shells. Therefore, B4C ceramics are generally only used for some special occasions with high requirements for protective performance.

      wear-resistant technology: B4C nozzles in the harsh conditions of the longest life than Al2O3 nozzle life to increase dozens of times, than SiC and WC nozzle life is also much longer. B4C’s excellent chemical stability, so that it can be used for slurry and liquid honing agent nozzles; made of B4C mantle, abrasive rods and similar abrasive devices is the first choice of the work of the chemical folding, because it avoids abrasive contamination brought about by the abrasive grinding process. Abrasive contamination brought about by the grinding process. boron carbide ceramic is used as an abrasive in the polishing, fine grinding or pulverizing process of other hard materials such as cemented carbide and engineering ceramics, replacing the original diamond abrasives used and reducing the cost of the grinding process. For example, boron carbide devices are used as pneumatic slide valves, hot extrusion molds, and journal bearings for cooling systems in atomic power plants; and as corrosion- and wear-resistant components in ceramic gas turbines.

       nuclear energy field: due to boron carbide neutron absorption cross-section is high, the absorption energy spectrum is wide, the price is low, the raw material source is abundant, there is no strong ray secondary radiation after absorbing neutrons, thus easy to waste disposal. Therefore, boron carbide is an important neutron absorption material. In the nuclear industry, the general selection of boron carbide sintered body containing 10B, 10B thermal neutron levitation cross section up to 3850/10-28 m2. 10B isotope in natural boron accounts for only 19.9at.%, while the enriched 10B up to 99at.%. B4C ceramics prepared using enriched 10B by hot-press sintering at 1900-2000°C, with up to 95% 10B isotope in the boron content, are used to control neutron flow in pressurized boiling water reactions, and in high-temperature and high-velocity flow breeder reactors. For protection and absorption of neutrons, rigid plates of B4C/C composites or soft thin plates of B4C/silicone rubber composites have been fabricated, which can be used for storage of used fuel elements and laboratory shielding.

        Boron carbide ceramic are important wear-resistant and high-hardness structural ceramic materials among new ceramics. As boron and carbon are non-metallic elements, and the atomic radius is close, the combination is different from the general gap compounds, so boron carbide ceramic have a high melting point, ultra-high hardness, low density, wear and corrosion resistance and many other unique and excellent performance in the national defense, nuclear energy, aerospace, machinery, wear-resistant technology and other fields, is increasingly showing its broad prospects for the development of applications.