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Bulletproof Boron Carbide B4C Ballistic Armour Plates With Hardness of 9.3
bulletproof plate
Material: boron carbide (plate)
Boron carbide (chemical formula approximately B4C) is an extremely hard ceramic material used in tank armor, bulletproof vests, and numerous industrial applications. With a hardness of 9.3 on the mohs scale, it is one of the hardest materials known, behind cubic boron nitride and diamond.
| Properties | |
|---|---|
| Molecular formula | B4C |
| Molar mass | 55.255 g/mol |
| Appearance | dark gray or black powder, odorless |
| Density | 2.52 g/cm3, solid. |
| Melting point |
2763 °C, 3036 K, 5005 °F |
| Boiling point |
3500 °C, 3773 K, 6332 °F |
| Solubility in water | insoluble |
| Acidity (pKa) | 6-7 (20 °C) |
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. Its Vickers hardness (38 GPa) and fracture toughness (3.5 MPa·m1/2) approach the corresponding values for diamond (115 GPa and 5.3 MPa·m1/2).
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