Boron Carbide (B4C)

Boron Carbide (B4C)


Boron carbide is an extremely hard boron-carbon ceramic. Boron carbide has a Mohs hardness of about 9.49, which is the third highest hardness material after diamond and cubic boron nitride. As of 2015, boron carbide is the third hardest substance known, after diamond and cubic boron nitride, earning it the nickname “black diamond”.

As a wear-resistant material, abrasives are widely used in industry.

As an abrasive, it is used in the form of powder for grinding (fine grinding) of metal and ceramic products, although its low oxidation temperature of 400-500 ℃makes it unable to withstand the heat of grinding hardened tool steel. Because of its hardness and extremely low density, it has been used as a reinforcing agent for aluminum in military armor and high-performance bicycles, and its wear resistance makes it used in blast nozzles and pump seals. The neutron absorber boron carbide is used in powder or solidified form to control the fission rate in nuclear reactors.

Edgetech Industries, advanced ceramics division is a leading supplier of ceramic materials. We offer boron carbide products of high purity and with competitive price.


Boron Carbide Properties


Boron carbide is known as a robust material having

-High hardness

-High cross section for absorption of neutrons (i.e. good shielding properties against neutrons),

-Stability to ionizing radiation and most chemicals.

-Low thermal conductivity

-Susceptible to thermal shock failure

-Extremely brittle

– Semiconductor properties


Boron Carbide Applications


The ability of boron carbide to absorb neutrons without forming long-lived radionuclides makes it attractive as an absorbent for neutron radiation arising in nuclear power plants and from anti-personnel neutron bombs.

-Nuclear applications of boron carbide include shielding, control rod and shut down pellets.

-Abrasives for lapping and ultrasonic cutting

-Anti-oxidant in carbon-bonded refractory mixes


-Wear parts such as blasting nozzles, wire-drawing dies, powdered metal and ceramic forming dies, thread guides


Boron Carbide Products