Boron Carbide, black crystal power, is one of the hardest materials
known, ranking third behind diamond and cubic boron nitride. It is
the hardest material produced in tonnage quantities. Originally
discovered in mid 19th century as a byproduct in the production of
metal borides, boron carbide was only studied in detail since 1930.
Density: 2.51 g/cm3
Crystal structure: Rhombohedral
Melting Point: Around 2,450�
Very high hardness: It is third hardest material next to diamond
Cubic boron nitride (CBN).
Thermal expansion coefficient: 5X10-4�-1
Boron carbide has a high neutron absorption cross section
Thermal neutron is around 4, 000 barns. And the price is much less
than pure boron.
Electrical conductive: Electrical resistivity at 25C is 0.1-10 ohm.
Boron Carbide Images