THERMAL-EXPANSION OF BULK AMORPHOUS ZR41.2TI13.8CU12.5NI10BE22.5 ALLOY

The linear thermal expansion of the bulk amorphous Zr41.2Ti13.8Cu12.5N i10Be22.5 (atomic percent) alloy has been measured from 80 K to 773 K, The data for T < T-g were fitted by a model based on the Gruneisen re lation and a Debye expression for the heat capacity. From the fit, we deducted the Gruneisen parameter, gamma = 1.25, and the Debye temperat ure, Theta(D) = 400 K. Annealing the amorphous alloy at 663 K, which i s between the glass transition temperature T-g = 623 K, and the crysta llization temperature T-x = 693 K, causes viscous flow in the sample. This is due to the small viscosity in the undercooled liquid.