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Pr60Ni25Al15 bulk metallic glass in a cuboid form with dimensions of 2 mm × 2 mm × 55 mm by copper mold casting method was cast. The dynamic viscosity near the glass transition region for Pr60Ni25Al15 was measured by three-point beam bending methods. The fragility parameter m and activation energy for viscous flow of the liquid sample were calculated to be: m = 31.66, E = 10689.17 K, respectively...