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In situ high-energy x-ray diffraction observation of structural evolution in a Ti-based bulk metallic glass upon heating

Published online by Cambridge University Press:  31 January 2011

N. Zheng ,
G. Wang ,
L.C. Zhang ,
M. Calin ,
M. Stoica ,
G. Vaughan ,
N. Mattern  and
J. Eckert
N. Zheng*
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
G. Wang
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
L.C. Zhang
Affiliation:
School of Mechanical Engineering, The University of Western Australia, Crawley, Perth, WA 6009, Australia
M. Calin
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
M. Stoica
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
G. Vaughan
Affiliation:
European Synchrotron Radiation Facilities ESRF, F-38042 Grenoble, France
N. Mattern
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
J. Eckert
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany; and TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The structural evolution of the Ti40Zr10Cu34Pd14Sn2 bulk metallic glass (BMG) upon was investigated by means of in situ high-energy x-ray diffraction. The position, width, and intensity of the first peak in diffraction patterns are fitted through Voigt function below 800 K. All the peak position, width, and intensity values show a nearly linear increase with the increasing temperature to the onset temperature of structural relaxation, Tr = 510 K. However, these values start to deviate from the linear behavior between Tr and Tg (the glass transition temperature). The changes in free volume and the coefficient of volume thermal expansion prove that the aforementioned phenomenon is closely related to the structural relaxation releasing excess free volume arrested during rapid quenching of the BMG. Above 800 K, three crystallization events are detected and the first exothermic event is due to the formation of metastable nanocrystals.

Keywords

TiAmorphousStructural
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 12 , December 2010 , pp. 2271 - 2277
Copyright
Copyright © Materials Research Society 2010

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Footnotes

b)

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy

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