A fast dynamic mode in rare earth based glasses.
J Chem Phys
; 144(20): 204507, 2016 May 28.
Article
em En
| MEDLINE
| ID: mdl-27250316
ABSTRACT
Metallic glasses (MGs) usually exhibit only slow ß-relaxation peak, and the signature of the fast dynamic is challenging to be observed experimentally in MGs. We report a general and unusual fast dynamic mode in a series of rare earth based MGs manifested as a distinct fast ß'-relaxation peak in addition to slow ß-relaxation and α-relaxation peaks. We show that the activation energy of the fast ß'-relaxation is about 12RTg and is equivalent to the activation of localized flow event. The coupling of these dynamic processes as well as their relationship with glass transition and structural heterogeneity is discussed.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article