Nonlinearities in the undercooled properties of Ti39.5Zr39.5Ni21

Using electrostatic-levitator (ESL)-based containerless processing combined with non-contact measuring techniques, surface tension and viscosity have been measured for Ti39.5Zr39.5Ni21, using the oscillating-drop method, in the superheated and metastable undercooled liquid states. Viscosity measurements show a non-Arrhenius behaviour that more closely matches a Vogel-Tamman Fulcher trend, and a sudden divergence away from a high-temperature linear trend in surface tension has been observed for this composition. An overview of the measurement technique as well as the measurements are presented.