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Boron Carbide Powder – Properties and Applications

Boron carbide

Also known as black diamond or inorganic material, a black micropowder with a chemical composition of B4C is usually grayish-black. It is known to be one of three most difficult materials (after cubic boron nutride and diamond).

Boron Carbide Properties

Boron carbide doesn’t react with acids and alkali solution. Boron carbide is one of most stable acids and can be found in concentrated, dilute or alkali-aqueous solutions.

Boron carbonide can be kept stable in an atmosphere below 800 degrees Celsius. Boron oxide is formed at higher temperatures by its oxidation. This causes it to lose its stability and then oxidize to carbon dioxide and/or boron trioxide.

Mohs hardness for boron carbonide is approximately 9.5. This is the third-hardest substance after diamonds and cubic boron nutride. However, its hardness exceeds that of silicon carbide. Boron carbide has low density and high strength. Also, it is stable at high temperatures.

Boron Carbide Products

Boron carbide has many uses, including in ceramic reinforcing phase, wear-resistant materials, lightweight armor and reactor neutron absorbers. Boron carbide is simple to make and inexpensive so it’s more commonly used. Boron carbide is a good substitute for expensive diamond.

Control nuclear fission

Boron carbide absorbs a lot of neutrons but does not produce radioactive isotopes. This makes it an ideal neutron absorber in nuclear power stations. Also, the neutron acceptor mainly regulates the rate at which nuclear fission takes place. Although it’s most commonly made in a controlled rod form in the nuclear reactor fields, some times it may be powdered due to its increased surface area.

Abrasive material

Because of its high melting points, boron carbide is hard to mold into any artificial product. But, the powder can still be melted at high temperatures to create simple shapes. This is useful for polishing and drilling hard materials, such as gemstones and cemented caride.

Coating paint

Boron carbide can be used to coat warships, helicopters with ceramics. Boron carbide is light-weight and can resist armor-piercing projectiles. The hot-press coating forms an integral defense shield layer.


This can be used in making gun nozzles within the munition industry. It has high wear resistance and high toughness. The boron nitride sandblasting tool will replace those of silicon carbide/tungsten or cemented carbide/tungsten.


Boron carbide may also be used for the production of metal borides.

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Boron carbide Powder

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