Titanium boride

Description

TiB₂ is very similar to titanium carbide, an important base material for cermets, and many of its properties (e.g. hardness, thermal conductivity, electrical conductivity and oxidation resistance) are superior to those of TiC:

• Exceptional hardness (25–35 GPa Vickers at room temperature, more than three times harder than fully hardened structural steel), which is retained up to high temperature.
• High melting point (3225 °C),
• High thermal conductivity (60-120 W/(m K)),
• High electrical conductivity (~10⁵ S/cm)

With respect to chemical stability, TiB₂ is more stable in contact with pure iron than tungsten carbide or silicon nitride.

TiB₂ is resistant to oxidation in air at temperatures up to 1100 °C, and to hydrochloric and hydrofluoric acids, but reacts with alkalis, nitric acid and sulfuric acid.

USES

An electrically conductive ceramic material.

ceramic cutting tools and molds.

composite ceramic material.

aluminum reduction cell cathode coating material.

made into a ceramic material and a flexible PTC material of the PTC heating

Is metal material such as A1, Fe, Cu good enhancers.

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