- Conference date: 2–7 December 2012
- Location: Sendai, Japan
The molten viscous behavior of the Vitreloy 106, 106a, 105 and 101 bulk metallic glass-forming alloys is investigated at temperatures above Tliq. Couette concentric cylinder viscometry is used to determine the isothermal and continuous cooling melt viscosities. Isothermal three-point beam-bending measurements of the viscosity in the vicinity of Tg reveal a kinetically stronger liquid at low temperatures than at high temperatures near Tliq. This behavior is revealed to be the result of a fragile-to-strong transition in the undercooled liquid, possibly due to polyamorphism.
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