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Why boron carbide has high hardness?

Views : 217
Author : Lzh
Update time : 2022-12-07 18:54:18

What is boron carbide?

Boron carbide also known as black diamond, is an inorganic substance with the formula BC, usually grey-black powder. It is one of the three hardest known materials (after diamond and cubic boron nitride) and is used in tank armour, body armour and many industrial applications. It has a hardness of about 9.5 on the Mohs scale. Boron carbide is insoluble in water and organic solvents, has strong chemical stability, is resistant to acid and alkali corrosion, and hardly reacts with all acid and alkali solutions. Boron carbide also has the following characteristics: it has a large thermal neutron capture section and strong neutron absorption capacity, so it is called a neutron absorber; It has semiconductor properties.

What is boron carbide used for?

Boron carbide is a rigid artificial material, second only to diamond and cubic boron nitride. The crystalline structure of boron carbide is hexagonal crystals. The density is 2.52g/cm3. The melting point is 2450 °C, and when the temperature exceeds 2800 °C, it quickly decomposes and volatilizes. Boron carbide is resistant to acid, alkali corrosion is not wetted with most molten metals, and has very high chemical stability. Boron carbide can resist air oxidation at 1000 °C, but it is easily oxidized above 900 °C in an oxidizing atmosphere. Boron carbide powder has a very high grinding capacity, more than 50% of the grinding capacity of silicon carbide, 1~2 times higher than the grinding capacity of corundum. It is an excellent grinding material and wear-resistant material.In addition, the strong chemical stability of boron carbide makes it resistant to high temperatures and armour-piercing bullet penetration, thus playing a bulletproof role, often used as bulletproof coating coatings and bulletproof ceramic materials. It is also used as an antioxidant, such as an additive in refractory magnesia carbon bricks and iron hook castable, under certain oxidizing atmosphere conditions, forming a protective layer of carbonaceous materials, preventing the excessive oxidation of carbonaceous materials, thereby extending the service life of refractory materials.

 

Why is boron carbide so hard?

Boron carbide is one of the commonly used materials for body armour, and it is a super hard material second only to diamond and cubic boron nitride. Its crystal structure is mainly orthorhombic hexahedrons, and its unique crystal structure forms a strong covalent bond. This crystal structure determines that boron carbide has excellent physical and chemical properties such as super hardness, high melting point, low density, low thermal expansion coefficient, high wear resistance, etc. This is why boron carbide has a high hardness.

 

Is boron carbide harmful to the human body?

Boron carbide is often called synthetic diamond, and according to current feedback, it has not been found to pose a hazard to the human body. Especially in manufacturing anti-neutron radiation fibres, boron compounds, heavy metal compounds, and polypropylene are blended and spun to make leather core anti-neutron and anti-X-ray fibres. The boron carbide content in the thread can reach 35%, and the fibre strength can come to 23-27CN/tex. The breaking elongation can get 20-40%, can be processed into knitted fabrics, woven fabrics and nonwovens used around the atomic energy reactor, and can make the neutron radiation protection shielding rate reach more than 44%.

 

The price of boron carbide

The market price of boron carbide powder is affected by various factors. Currently, its market price is in the process of dynamic change. If you need it, please contact us at any time.

 

Boron carbide powder supplier

TRUNNANO (aka. Luoyang Tongrun Nano Technology Co., Ltd.) is a reputable global chemical material supplier and manufacturer with 12 years of experience providing high-quality chemical materials and manufacturing processes. Currently, our company has successfully developed a series of powder materials. OEM service is available. If you are looking for Boron carbide powder, please contact us or click on the needed products to send us an inquiry. 
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