Abstract
A study has been made to investigate the effects of free-volume fraction, steady state viscous flow temperature and viscosity on the glass transition and viscous flow behaviour of Cu x Zr 100− x ( x = 40, 50 and 60), Ni x Zr 100− x ( x = 40 and 50) and Cu x Ti 100− x ( x = 40 and 50) amorphous alloys. It was observed that the displacement at T x increases in the order Cu 40Zr 60 > Ni 40Zr 60 > Cu 40Ti 60. We found that this order can be explained by the free-volume fraction and maximum displacement rate at T vs. The relationship between viscosity and free-volume fraction below T x is consistent with Doolittle's empirical formula for the CuZr, CuTi and NiZr systems. It is presumed that the kinetics of free-volume production and annihilation are involved in the thermal stability and glass transition temperature.
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