Polycrystalline cubic boron nitride prepared with cubic-hexagonal boron nitride under high pressure and high temperature
Yang Ming1, Kou Zi-Li1, †, Liu Teng1, Lu Jing-Rui1, Liu Fang-Ming2, Liu Yin-Juan1, Qi Lei1, Ding Wei1, Gong Hong-Xia1, Ni Xiao-Lin1, He Duan-Wei1
       

SEM images of fracture surfaces of PcBN samples sintered at various P–T conditions. (a) 6.5 GPa/1750 °C. (b) 7.7 GPa/1750 °C. (c) 9.0 GPa/1750 °C. (d) 10.0 GPa/1750 °C.