抄録
The synthesis of single-phase CrB was succeeded by self-propagating high-temperature synthesis (SHS) in an argon atmosphere from an elemental mixed powders (Cr: ≤ 2μm and B:0.2μm) preheated at 300° to 600°C in a reduced pressure. The dense monolithic CrB ceramics ( ≥ 98% of theoretical) were obtained by hot-isostatically pressing CrB powder for 2h under 196 MPa at 1200°to 1500°C. They revealed excellent mechanical properties: Vicker's hardness Hv-23.3 GPa, bending strength σb-690 MPa and fracture toughness KIC- 6.6MPa⋅m1/2.
