Crystallization of a ${\mathrm{Cu}}_{60}{\mathrm{Zr}}_{20}{\mathrm{Hf}}_{10}{\mathrm{Ti}}_{10}$ bulk metallic glass in the entire supercooled liquid region (SLR) is studied using an in situ x-ray diffraction with synchrotron radiation under high pressure and a differential scanning calorimeter at ambient pressure. The temperature-time-transition diagrams under ambient and high pressure are determined and compared, and the phase evolution of the crystallization with time is in situ exhibited under high pressure. We find that the crystallization in the temperature regime near glass transition temperature and near melting temperature in SLR cannot be described by a single crystallization mechanism in the entire SLR under high pressure. The effects of pressure on the crystallization of the BMG are explored.

• Received 9 June 2003

DOI:https://doi.org/10.1103/PhysRevB.69.092202