Nonlinearities in the undercooled properties of Ti_39.5Zr_39.5Ni₂₁

Abstract

Using electrostatic-levitator (ESL)-based containerless processing combined with non-contact measuring techniques, surface tension and viscosity have been measured for Ti_39.5Zr_39.5Ni₂₁, 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.

Acknowledgements

This work was supported in part by the NASA Office of Biological and Physical Research through grants NAG8-1682 and NNM04AA016, and NASA Graduate Student Researchers Program Fellowship NGT8-52948. The ESL work was performed at the NASA Marshall Space Flight Center Electrostatic Levitation Facility.

Notes

Formerly at Department of Physics, Washington University, St. Louis, Missouri 3130, USA.

Additional information

Notes on contributors

G. W. Lee‖

Formerly at Department of Physics, Washington University, St. Louis, Missouri 3130, USA.