fig5

Figure 5. SAED and HRTEM images of samples obtained at 25 GPa 1,400 °C, (A) TEM image of crystalline-amorphous boundary; (B) Diffraction pattern of amorphous-crystalline phases (black cycle region); (C) Diffraction pattern of crystalline region (red cycle region); (D) Diffraction pattern of amorphous region (yellow cycle region); (E and F) EELS spectrum of boron and carbon.