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Application of B4C


Application of boron carbide


Bullet-proof armor plates for individuals and vehicles

Boron carbide is also used as bulletproof armor with other materials, including body or personal armor.The material's high hardness, high elastic modulus, and low density give it extraordinary deterrents against high-velocity projectiles.

Muzzle or gun muzzle

It can be used as a muzzle in the military industry.Boron carbide is extremely hard and wear-resistant, does not react with acid and base, high/low temperature resistance, high pressure, density ≥2.46g/cm3;Microhardness ≥3500kgf/mm2, bending strength ≥400Mpa, melting point 2450℃

Because the boron carbide nozzle has the above characteristics of high wear resistance and high hardness, the boron carbide sandblasting nozzle will gradually replace the known carbide/tungsten steel and silicon carbide, silicon nitride, alumina, zirconia and other materials.

Sand blast nozzle

Due to its high wear and wear resistance, borides are used as slurry pumping nozzles, sandblasting nozzles and water cutters.

High-pressure water cutter nozzle

Scratch and wear resistant coating

As an abrasive

Boron carbide has long been used as a coarse abrasive material. Because of its high melting point, it is not easy to cast into artificial products, but by melting the powder at high temperatures, it can be processed into simple shapes. For grinding, grinding, drilling and polishing of hard materials such as cemented carbide and gemstones.

Powders used for polishing and grinding applications are also loose abrasives for cutting applications such as water cutting.It is also useful for polishing diamond tools.

Absorbing neutrons in a nuclear reactor

Boron carbide can absorb a large number of neutrons without forming any radioactive isotopes, so it is an ideal neutron absorber in nuclear power plants, which mainly controls the rate of nuclear fission.Boron-carbides are mainly made into controllable rods in nuclear reaction sites, but are sometimes made into powders due to increased surface area.

When the Chernobyl nuclear accident occurred in 1986, Russia dropped nearly 2,000 tons of boron carbide and sand, which eventually stopped the chain reaction in the reactor.


Boron carbide can also be used as a ceramic coating for warships and helicopters.It is lightweight and has the ability to resist armor-piercing bullets penetrating the hot pressed coating into the overall defense layer.

Metal matrix composites

For example, B4C added to aluminum alloys can manufacture modern high-performance metal matrix composites with improved strength, thermal behavior, chemical inertness and wear resistance.

Solid fuel ramjet high energy fuel

Boron carbide is highly loaded with hydroxy-terminated polybutadiene fuel particles and is used in solid fuel ramjet engines.The composition of this fuel mainly consists of hydroxy-terminated polybutadiene (HTPB), magnesium, aluminum and boron carbide, of which the weight percentage of boron carbide is about 25% and the weight percentage of HTPB is about 50%.The performance of this fuel is directly related to the energy density and combustion behavior of the fuel.

Brake gaskets for use in vehicles

Boron carbide has high hardness and wear resistance and is the main additive for brake linings in high-performance applications

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