Polycrystalline cubic boron nitride prepared with cubic-hexagonal boron nitride under high pressure and high temperature

Yang Ming¹, Kou Zi-Li^{1, †}, Liu Teng¹, Lu Jing-Rui¹, Liu Fang-Ming², Liu Yin-Juan¹, Qi Lei¹, Ding Wei¹, Gong Hong-Xia¹, Ni Xiao-Lin¹, He Duan-Wei¹

(color online) (a) XRD patterns of starting material and samples hBN content of the starting materials (range from 16 vol.% to 28 vol.%) sintered at 7.5 GPa/1750 °C. (b) XRD patterns of starting material and samples (20 vol.%-hBN) sintered at 6.5–10.0 GPa/1750 °C.