Dynamic Mechanical Relaxation in LaCe-Based Metallic Glasses: Influence of the Chemical Composition
Minna Liu,
Jichao Qiao,
Qi Hao,
Yinghong Chen,
Yao Yao,
Daniel Crespo,
Jean-Marc Pelletier
Affiliations
Minna Liu
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Jichao Qiao
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Qi Hao
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Yinghong Chen
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Yao Yao
School of Mechanics, Civil Engineering Architecture, Northwestern Polytechnical University, Xi’an 710072, China
Daniel Crespo
Departament de Física, Barcelona Research Center in Multiscale Science and Technology & Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, 08930 Barcelona, Spain
Jean-Marc Pelletier
MATEIS, UMR CNRS5510, Bat. B. Pascal, INSA-Lyon, F-69621 Villeurbanne CEDEX, France
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.
