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Containerless Measurement of Thermophysical Properties of Ti-Zr-Ni AlloysThe surface tension, viscosity, density, and thermal expansion of Ti-Zr-Ni alloys were measured for a number of compositions by electrostatic levitation methods. Containerless methods greatly reduce heterogeneous nucleation, increasing access to the undercooled liquid regime at finite cooling rates. The density and thermal expansion are measured optically, while the surface tension and viscosity are measured by the oscillating drop method. The measured alloys include compositions which form a metastable quasicrystal phase from the undercooled liquid, and alloys close to the composition of several multi-component bulk metallic glass-forming alloys. Measurements of surface tension show behavior typical of transition metals at high temperature, but a sudden decrease in the deeply undercooled liquid for alloys near the quasicrystal-forming composition range, but not for compositions which form the solid-solution phase first.
Document ID
20040047280
Document Type
Conference Paper
Authors
Hyers, Robert (Massachusetts Univ. Amherst, MA, United States)
Bradshaw, Richard C. (Massachusetts Univ. Amherst, MA, United States)
Rogers, Jan C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Rathz, Thomas J. (Alabama Univ. Huntsville, AL, United States)
Lee, Geun W. (Washington Univ. Saint Louis, MO, United States)
Gangopadhyay, Anup K. (Washington Univ. Saint Louis, MO, United States)
Kelton, Kenneth F. (Washington Univ. Saint Louis, MO, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Metals and Metallic Materials
Meeting Information
Minerals, Metals & Materials Society (TMS) Annual Meeting(Charlotte, NC)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.