Please use this identifier to cite or link to this item:
|Title:||Atomic-scale structural evolution and stability of supercooled liquid of a Zr-based bulk metallic glass|
Liu, C. T.
Dong, Y. D.
Glass forming machines
High resolution electron microscopy
High resolution transmission electron microscopy
Transmission electron microscopy
|Publisher:||American Physical Society|
|Source:||Physical review letters, 27 May 2011, v. 106, no. 21, 215505, p. 1-4.|
|Abstract:||In this Letter, direct experimental evidence is provided for understanding the thermal stability with respect to crystallization in the Zr₄₁.₂Ti₁₃.₈Cu₁₂.₅Ni₁₀Be₂₂.₅ glass-forming liquid. Through high-resolution transmission electron microscopy, the atomic-structure evolution in the glass-forming liquid during the isothermal annealing process is clearly revealed. In contrast with the existing theoretical models, our results reveal that, prior to nanocrystallization, there exists a metastable state prone to forming icosahedralike atomic clusters, which impede the subsequent crystallization and hence stabilize the supercooled liquid. The outcome of the current research underpins the topological origin for the excellent thermal stability displayed by the Zr-based bulk metallic glass.|
|Rights:||Physical Review Letters © 2011 The American Physical Society. The Journal's web site is located at http://prl.aps.org/|
|Appears in Collections:||ME Journal/Magazine Articles|
Files in This Item:
|Wang_Zr-Based_Metallic_Glass.pdf||755.64 kB||Adobe PDF||View/Open|
All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.