Title:
|
Slow beta relaxation in La-based metallic glasses based on mechanical spectroscopy measurements
|
Author:
|
Qiao, Jichao; Pelletier, J. M.; Li, Ning; Crespo Artiaga, Daniel; Yao, Yao
|
Other authors:
|
Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
Abstract:
|
Dynamic mechanical relaxations of La-based metallic glasses were investigated by mechanical spectroscopy. In the framework of the mixing enthalpy of constituent atoms, it was found that ß relaxation was less evident by the addition of Cu to replace Ni in the LaCuNiAl glassy alloy. By introducing Cu into the LaNiAl metallic glass, the mixing enthalpy was less negative, which led to weaker ß relaxation of the metallic glasses. The a relaxation of the La-based metallic glasses could be described by a Kohlrausch-Williams-Watts (KWW) function with a Kohlrausch exponent ßKWW around 0.5. It should be noted that physical aging above the glass transition temperature Tg induced a decrease of ß relaxation intensity in the La-based metallic glass. |
Abstract:
|
Peer Reviewed |
Subject(s):
|
-Àrees temàtiques de la UPC::Física::Física de fluids -Metal crystals -Metallic glass -Mechanical relaxation -beta relaxation -Mixing enthalpy -Cristalls metàl·lics |
Rights:
|
|
Document type:
|
Article - Submitted version Article |
Share:
|
|