NIMTE OpenIR  > 2018专题
Two-step relaxations in metallic glasses during isothermal annealing
Song, Lijian; Xu, Wei; Huo, Juntao; Wang, Jim-Qiang; Wang, Xinmin; Li, Runwei
2018
Source PublicationINTERMETALLICS
Volume93Pages:101-105
AbstractIsothermal annealing is a very useful strategy in modulating the properties and structures of metallic glasses, which has been regarded as a single relaxation progress. In this work, the enthalpy relaxation of Au-based metallic glasses are studied using a high-precision calorimetry. An intriguing transition from beta relaxation to alpha relaxation was confirmed during isothermal annealing. Energy landscape model is proposed to quantitatively explain how the relaxation modes transform. It is found that a small enthalpy decrease (about 0.8 kJ/mol) in initial state causes an extremely large increase (about 100 kJ/mol) in relaxation barrier, which is attributed to the enhanced cooperative atomic motion. These results open a gate for precisely understanding the role of different relaxation modes in modifying the properties of metallic glasses.
KeywordJohari-goldstein Relaxation Secondary Relaxation Beta-relaxation Free-volume Structural Relaxation Supercooled Liquids Kinetic Stability Elastic Models Transition Temperature
Subject AreaBiophysics ; Chemistry ; Materials Science
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/16833
Collection2018专题
Recommended Citation
GB/T 7714
Song, Lijian,Xu, Wei,Huo, Juntao,et al. Two-step relaxations in metallic glasses during isothermal annealing[J]. INTERMETALLICS,2018,93:101-105.
APA Song, Lijian,Xu, Wei,Huo, Juntao,Wang, Jim-Qiang,Wang, Xinmin,&Li, Runwei.(2018).Two-step relaxations in metallic glasses during isothermal annealing.INTERMETALLICS,93,101-105.
MLA Song, Lijian,et al."Two-step relaxations in metallic glasses during isothermal annealing".INTERMETALLICS 93(2018):101-105.
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