Modified Angell Plot of Viscous Flow with Application to Silicate and Metallic Glass-Forming Liquids

作者：Kozmidis Petrovic Ana F^*

来源：International Journal of Applied Glass Science, 2014, 5(2): 193-205.

DOI：10.1111/ijag.12062

The behavior of the Vogel-Fulcher-Tammann (VFT), Avramov and Milchev (AM) and Mauro, Yue, Ellison, Gupta and Allan (MYEGA) functions of viscous flow in relation to t = T-g/(T -T-o) is analyzed, where Tg is glass transition temperature and T-o is the temperature in the VFT equation at which the configurational entropy becomes zero. The T-g-scaled Arrhenius plot (the Angell plot) has been modified. The log eta -(T-g/T) relationships in the Angell plot were modified as log eta-(T-g)/(T -T-o) relationships (T-g-scaled VFT plot). The values of parameter m(1) = d(log eta)/dt vertical bar(T= Tg) for some silicate and metallic glass-forming liquids are presented too. The parameter m(1) still exhibits "fragility" effect as does the kinetic fragility parameter m - d(log eta)/d (T-g/T) vertical bar(T= Tg) in the Angell plot. The plot of log eta(VFT) in relation to t = T-g/(T-T-o) is the linear function unlike the Angell plot. The dependences of log eta(MYEGA) and log eta(AM) on t are not linear. It is possible to present the dependences of log eta as functions of m(1) and t in the form of 3D graphs.

• 出版日期2014-6