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Properties of boron carbide


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  • Properties of boron carbide

1) large hardness: the most important performance of boron carbide is its supernormal hardness (the mohs hardness is 9.3), which is second only to diamond and cubic boron nitride, and it is the most ideal high-temperature wear-resistant material.

2) low density: boron carbide is the lightest ceramic material and can be used in the aerospace field;

3) the neutron absorption capacity of boron carbide is very strong: compared with pure element B and Cd, it has low cost, good corrosion resistance and thermal stability, and is widely used in nuclear industry. The neutron absorption capacity of boron carbide can be further improved by adding element B.

4) excellent chemical performance of boron carbide: it does not react with acids, bases and most inorganic compounds at room temperature, but only slowly corrodes in the mixture of hydrofluoric acid -- sulfuric acid and hydrofluoric acid -- nitric acid. It is one of the compounds with the most stable chemical properties.

5) various physical performance advantages of boron carbide: boron carbide also has the advantages of high melting point, high elastic modulus, low expansion coefficient and good oxygen absorption capacity.

6) boron carbide is also a p-type semiconductor: it can maintain its semiconductor properties even at very high temperatures.