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Metallic Glasses: A New Approach to the Understanding of the Defect Structure and Physical Properties
Open AccessArticle

Dynamic Mechanical Relaxation in LaCe-Based Metallic Glasses: Influence of the Chemical Composition

1
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
2
Departament de Física, Barcelona Research Center in Multiscale Science and Technology & Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, 08930 Barcelona, Spain
3
MATEIS, UMR CNRS5510, Bat. B. Pascal, INSA-Lyon, F-69621 Villeurbanne CEDEX, France
*
Author to whom correspondence should be addressed.
Metals 2019, 9(9), 1013; https://doi.org/10.3390/met9091013
Received: 13 August 2019 / Revised: 3 September 2019 / Accepted: 14 September 2019 / Published: 17 September 2019
(This article belongs to the Special Issue Recent Advancements in Metallic Glasses)
The mechanical relaxation behavior of the (La0.5Ce0.5)65Al10(CoxCu1−x)25 at% (x = 0, 0.2, 0.4, 0.6, and 0.8) metallic glasses was probed by dynamic mechanical analysis. The intensity of the secondary β relaxation increases along with the Co/Cu ratio, as has been reported in metallic glasses where the enthalpy of mixing for all pairs of atoms is negative. Furthermore, the intensity of the secondary β relaxation decreases after physical aging below the glass transition temperature, which is probably due to the reduction of the atomic mobility induced by physical aging. View Full-Text
Keywords: metallic glasses; mechanical spectroscopy; mixing enthalpy; Kohlrausch–Williams–Watts equation; structural heterogeneity metallic glasses; mechanical spectroscopy; mixing enthalpy; Kohlrausch–Williams–Watts equation; structural heterogeneity
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Liu, M.; Qiao, J.; Hao, Q.; Chen, Y.; Yao, Y.; Crespo, D.; Pelletier, J.-M. Dynamic Mechanical Relaxation in LaCe-Based Metallic Glasses: Influence of the Chemical Composition. Metals 2019, 9, 1013.

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