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Thermal and radiation-enhanced diffusion in the bulk metallic glass Ni23Zr62Al15

Flege, Stefan and Hahn, Horst and Averback, R. S. (2004):
Thermal and radiation-enhanced diffusion in the bulk metallic glass Ni23Zr62Al15.
In: Physical Review B, 69 (1), pp. 014303. American Physical Society, ISSN 1098-0121,
DOI: 10.1103/PhysRevB.69.014303,
[Article]

Abstract

The temperature dependence of tracer diffusion in the three-component system NiZrAl was measured. For the composition Ni23Zr62Al15, it was possible to measure diffusion coefficients below and above the glass transition temperature. Similar to the binary metallic glass NiZr, the diffusion coefficient was strongly dependent on the atomic size of the tracer, varying by two orders of magnitude. The results are suggestive of a collective diffusion mechanism in bulk metallic glasses. Radiation-enhanced diffusion was also measured in this alloy and compared with measurements of radiation-induced viscous flow on similar alloys.

Item Type: Article
Erschienen: 2004
Creators: Flege, Stefan and Hahn, Horst and Averback, R. S.
Title: Thermal and radiation-enhanced diffusion in the bulk metallic glass Ni23Zr62Al15
Language: English
Abstract:

The temperature dependence of tracer diffusion in the three-component system NiZrAl was measured. For the composition Ni23Zr62Al15, it was possible to measure diffusion coefficients below and above the glass transition temperature. Similar to the binary metallic glass NiZr, the diffusion coefficient was strongly dependent on the atomic size of the tracer, varying by two orders of magnitude. The results are suggestive of a collective diffusion mechanism in bulk metallic glasses. Radiation-enhanced diffusion was also measured in this alloy and compared with measurements of radiation-induced viscous flow on similar alloys.

Journal or Publication Title: Physical Review B
Journal volume: 69
Number: 1
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 20 Nov 2008 08:19
DOI: 10.1103/PhysRevB.69.014303
Additional Information:

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Funders: This work was supported by the DFG Schwerpunkt-Programm ‘‘Unterku¨hlte Metallschmelzen: Phasenselektion und Glasbildung’’ and in part by the Department of Energy, Basic Energy Sciences under Grant No. DEFG02-91-ER45439.
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