Tantalum Diboride (TaB2)-Powder

Characteristic

Tantalum borides are compounds of tantalum and boron most remarkable for their extreme hardness.

The Vickers hardness of TaB and TaB₂ films and crystals is ~30 GPa. Those materials are stable to oxidation below 700 °C and to acid corrosion.

TaB₂ has the same hexagonal structure as most diborides (AlB₂, MgB₂, etc.). The mentioned borides have the following space groups: TaB (orthorhombic, Thallium(I) iodide-type, Cmcm), Ta₅B₆ (Cmmm), Ta₃B₄ (Immm), TaB₂ (hexagonal, aluminum diboride-type, P6/mmm).

TaB2.pdf