Fabrication and Mechanical Properties of Titanium Boride Ceramics

Dense TiB ceramics (99.6% of theoretical) with a grain size of ∼5 µm have been fabricated by reaction hot pressing of TiB 2 and titanium for 2 h at 1900°C and 28.5 MPa. The TiB ceramics exhibit a fracture toughness ( K IC ) of 4.5 MPa·m 1/2 and a bending strength (sigma b ) of 360 MPa. Electrical resistivity (rho) is 3.4 × 10 ‐7 Omega·m at room temperature.