Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation

K. Hajlaoui; M. A. Yousfi; I. Ouelhazi; K. Georgarakis; Z. Tourki; G. Vaughan; A. R. Yavari

doi:10.1080/09500839.2010.537701

Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation

K. Hajlaoui, M. A. Yousfi, I. Ouelhazi, K. Georgarakis, Z. Tourki, G. Vaughan, A. R. Yavari

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

Quantitative measurements of the excess free volume in Pd ₄₀Cu₃₀Ni₁₀P₂₀ and Cu ₅₅Zr₃₀Ti₁₀Pd₅metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.

Original language	English
Pages (from-to)	122-133
Number of pages	12
Journal	Philosophical Magazine Letters
Volume	91
Issue number	2
DOIs	https://doi.org/10.1080/09500839.2010.537701
Publication status	Published - 2011 Feb 1

Keywords

free volume
metallic glasses
structural relaxation
synchrotron radiation
X-ray diffraction

ASJC Scopus subject areas

Condensed Matter Physics

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Hajlaoui, K., Yousfi, M. A., Ouelhazi, I., Georgarakis, K., Tourki, Z., Vaughan, G., & Yavari, A. R. (2011). Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation. Philosophical Magazine Letters, 91(2), 122-133. https://doi.org/10.1080/09500839.2010.537701

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abstract = "Quantitative measurements of the excess free volume in Pd 40Cu30Ni10P20 and Cu 55Zr30Ti10Pd5metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.",

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AU - Yousfi, M. A.

AU - Ouelhazi, I.

AU - Georgarakis, K.

AU - Tourki, Z.

AU - Vaughan, G.

AU - Yavari, A. R.

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AB - Quantitative measurements of the excess free volume in Pd 40Cu30Ni10P20 and Cu 55Zr30Ti10Pd5metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.

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KW - structural relaxation

KW - synchrotron radiation

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