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Diffusion in amorphous NiZrAl alloys

Flege, Stefan and Hahn, Horst and Fechner, U. (2000):
Diffusion in amorphous NiZrAl alloys.
In: Journal of non-crystalline solids, Elsevier, pp. 123-128, 270, (1-3), [Article]

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 and Hahn, Horst and Fechner, U.
Title: Diffusion in amorphous NiZrAl alloys
Language: English
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.

Journal or Publication Title: Journal of non-crystalline solids
Volume: 270
Number: 1-3
Publisher: Elsevier
Uncontrolled Keywords: D210, A180, M190
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 Nov 2008 15:59
Funders: This work was supported by the DFG Schwerpunkt-Programm ‘Unterkühlte Metallschmelzen: Phasenselektion und Glasbildung’ Nr. Ha1344/8-1
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