Nanoscale Inhomogeneities in the Glass Transition of Zr41.2Ti13.8Cu12.5Ni10Be22.5 Bulk Metallic Glass
SUN Min-Hua1,2, WU Zhong-Hua2, LIU Guang-Rong3, CHEN Xing2, CHEN Zhong-Jun2
1Department of Physics, Harbin Normal University, Harbin 150025
2Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, PO Box 918, Beijing 100049
3Key Laboratory for Liquid Structure and Heredity of Materials (Ministry of Education), Shandong University, Jinan 250061
Nanoscale Inhomogeneities in the Glass Transition of Zr41.2Ti13.8Cu12.5Ni10Be22.5 Bulk Metallic Glass
SUN Min-Hua1,2;WU Zhong-Hua2;LIU Guang-Rong3;CHEN Xing2;CHEN Zhong-Jun2
1Department of Physics, Harbin Normal University, Harbin 150025
2Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, PO Box 918, Beijing 100049
3Key Laboratory for Liquid Structure and Heredity of Materials (Ministry of Education), Shandong University, Jinan 250061
Abstract： By using small-angle x-ray scattering technique, correlation lengths of the density fluctuation are determined for the bulk metallic glass Zr41.2Ti13.8Cu12.5Ni10Be22.5 around the glass transition temperature Tg. Nanoscale inhomogeneities were found to exist in the supercooled liquid and glass state. The correlation length was found to vary with temperature T in an exponential law δ(T)= δ0+A1exp[-(T-T∞)/T1], where T∞ is the Vogel temperature, and parameters δ0, A1 and T1 were simulated to be 16.45nm, 1.88×1029nm, and 9.65K, respectively, in the temperature region from Tg to Tg+80K. The correlation length of the density fluctuation obtained by the small-angle x-ray scattering method can be considered as the characteristic length of glass transition.
2005, Vol. 22 
