Pressure effect of glass transition temperature in Zr_(46.8)Ti_(8.2)Cu_(7.5)Ni_(10)Be_(27.5) bulk metallic glass

摘要

Pressure effects on glass transition temperature and supercooled liquid region of a Zr_(46.8)Ti_(8.2)Cu_(7.5)Ni_(10)Be_(27.5) bulk glass have been investigated by performing in situ high-temperature and high-pressure x-ray powder diffraction measurements using synchrotron radiation. The glass transition was detected from the change of the slope of peak position as a function of temperature. It is found that the glass transition temperature increases with pressure by 4.4 K/GPa for the Zr_(46.8)Ti_(8.2)Cu_(7.5)Ni_(10)Be_(27.5) bulk glass, and the supercooled liquid range decreases with pressure by 2.9 K/GPa in a pressure range of 0-2.2 GPa. This method opens a possibility to study the pressure effect of glass transition process in glassy systems under high pressures (>1 GPa).