常圧焼結法によるTiB₂-ZrO₂焼結体の焼結性と破壊靭性

抄録

Sinterability, Vickers hardness and fracture toughness of TiB₂-ZrO₂ composites, with ranging from 10 to 60 wt% of 3 mol% Y₂O₃⋅ZrO₂, produced by pressureless sintering at 1600°C to 1900°C were investigated. In the cases of the content of more than 40 wt%ZrO₂ and the sintering temperature of more than 1700°C, the composites having relative density of more than 95% were obtained. The Vickers hardness of TiB₂50 wt%-ZrO₂50 wt% composite was about 15 GPa. The fracture toughness of TiB₂60 wt%-ZrO₂40 wt% composite was about 8.5 MPa√m.