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 the starting materials. (a) Cubic BN powder and (b) hexagonal BN powder. (c) SEM image of mixed starting material. (d) SEM image of the recovered sample after cold compaction (7.5 GPa).