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Quenched-in Free Volume Vf, Deformation-induced Free Volume, the Glass Transition Tg and Thermal Expansion in glassy ZrNbCuNiAl measured by Time-resolved Diffraction in Transmission

Published online by Cambridge University Press:  01 February 2011

A. R. Yavari ,
M. Tonegaru ,
N. Lupu ,
A Inoue ,
E. Matsubara ,
G. Vaughan ,
Å. Kvick  and
W.J. Botta
A. R. Yavari
Affiliation:
Euronano-LTPCM-CNRS, Institut National Polytechnique de Grenoble, BP 75, 38402 St-Martin-d'Hères Campus, France (euronano@ltpcm.inpg.fr)
M. Tonegaru
Affiliation:
Euronano-LTPCM-CNRS, Institut National Polytechnique de Grenoble, BP 75, 38402 St-Martin-d'Hères Campus, France (euronano@ltpcm.inpg.fr)
N. Lupu
Affiliation:
Institute for Materials Research, Tohoku University, 980–8577 Sendai, Japan
A Inoue
Affiliation:
Institute for Materials Research, Tohoku University, 980–8577 Sendai, Japan
E. Matsubara
Affiliation:
Institute for Materials Research, Tohoku University, 980–8577 Sendai, Japan
G. Vaughan
Affiliation:
European Synchrotron Radiation Facilities (ESRF), 38042 Grenoble, France
Å. Kvick
Affiliation:
European Synchrotron Radiation Facilities (ESRF), 38042 Grenoble, France
W.J. Botta
Affiliation:
Euronano-LTPCM-CNRS, Institut National Polytechnique de Grenoble, BP 75, 38402 St-Martin-d'Hères Campus, France (euronano@ltpcm.inpg.fr)
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Abstract

Using high-precision X-ray dilatometry, we have succeeded in directly measuring excess quenched-in free-volume Vf in metallic glasses. The method was applied to the very easy glass forming Zr57Nb5Cu15.4Ni12.6Al10 (Vit 106). The annealing out of the order of 0.5% free volume was observed during heat treatment of rapidly solidified glassy ribbons. Excess free volume was also generated by heavy deformation and observed to anneal out during heat treatment. Once the excess free volume anneals out, the glass transition Tg appears clearly as a break in the x-ray dilatation curves as the glass goes over to the supercooled liquid region prior to crystallization at Tx.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 806: Symposium MM – Amorphous and Nanocrystalline Metals , 2003 , MM3.5
Copyright
Copyright © Materials Research Society 2004

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References

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