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Diffusion in amorphous NiZrAl alloys

Flege, Stefan ; Hahn, Horst ; Fechner, U. (2000)
Diffusion in amorphous NiZrAl alloys.
In: Journal of non-crystalline solids, 270 (1-3)
Article, Bibliographie

Abstract

Tracer diffusion coefficients for large and small sized impurities were measured in the bulk metallic glass NixZryAlz for several compositions. Molecular beam deposition was employed to grow thin films and secondary ion mass spectrometry was used to determine the concentration-depth profiles of several tracers. A dependence of the atomic mobility of the tracer on its size was found, as observed in the binary NixZry amorphous alloy system. The presence of the Al reduces the diffusion coefficients in general, with a stronger decrease for the small sized tracer. The results support the existence of two different diffusion mechanisms proposed for amorphous metallic alloys.

Item Type: Article
Erschienen: 2000
Creators: Flege, Stefan ; Hahn, Horst ; Fechner, U.
Type of entry: Bibliographie
Title: Diffusion in amorphous NiZrAl alloys
Language: English
Date: 11 May 2000
Publisher: Elsevier
Journal or Publication Title: Journal of non-crystalline solids
Volume of the journal: 270
Issue Number: 1-3
Abstract:

Tracer diffusion coefficients for large and small sized impurities were measured in the bulk metallic glass NixZryAlz for several compositions. Molecular beam deposition was employed to grow thin films and secondary ion mass spectrometry was used to determine the concentration-depth profiles of several tracers. A dependence of the atomic mobility of the tracer on its size was found, as observed in the binary NixZry amorphous alloy system. The presence of the Al reduces the diffusion coefficients in general, with a stronger decrease for the small sized tracer. The results support the existence of two different diffusion mechanisms proposed for amorphous metallic alloys.

Uncontrolled Keywords: D210, A180, M190
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 > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 19 Nov 2008 15:59
Last Modified: 20 Feb 2020 13:27
PPN:
Funders: This work was supported by the DFG Schwerpunkt-Programm ‘Unterkühlte Metallschmelzen: Phasenselektion und Glasbildung’ Nr. Ha1344/8-1
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