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

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 th...

Full description

Saved in:
Bibliographic Details
Published inMetals (Basel ) Vol. 9; no. 9; p. 1013
Main Authors Liu, Minna, Qiao, Jichao, Hao, Qi, Chen, Yinghong, Yao, Yao, Crespo, Daniel, Pelletier, Jean-Marc
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 2019
Subjects
Aging (artificial)
Alloys
Amorphous materials
Atomic mobilities
Chemical composition
Crystallization
Dynamic mechanical analysis
Enthalpy
Glass
Glass transition temperature
Kohlrausch–Williams–Watts equation
Mechanical properties
mechanical spectroscopy
Metallic glasses
mixing enthalpy
structural heterogeneity
Temperature
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:2075-4701
2075-4701
DOI:10.3390/met9091013