Atomic transport in amorphous metals
- Resource Type
- research-article
- Authors
- Egami, T.
- Source
- International Journal of Materials Research. 93(10):1071-1076
- Subject
- Amorphous metals
Atomic transport
Diffusion mechanism
Metallic glasses
Bulk metallic glasses
Liquid fragility
Articles/Aufsätze
- Language
- English
- ISSN
- 2195-8556
1862-5282
A novel mechanism of atomic transport in amorphous metallic alloys, or metallic glasses, is proposed based upon the fluctuations in the local structure. The proposed mechanism is very different from those in crystalline solids and from the free volume model, and is characterized by the bond-exchange action triggered by the local topological instability of the atomic environment. The implications of this mechanism on the liquid fragility and bulk metallic glass formation are discussed.