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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2233

Title: Phase-oriented surface segregation in an aluminium casting alloy.
Authors: Nguyen, CL
Atanacio, AJ
Zhang, W
Prince, KE
Hyland, MM
Metson, JB
Keywords: Aluminium Alloys
Casting
Segregation
Surfaces
X-Ray Photoelectron Spectroscopy
Magnesium
Issue Date: 15-Feb-2009
Publisher: Elsevier
Citation: Nguyen, C. L., Atanacio, A., Zhang, W., Prince, K. E., Hyland, M. M., & Metson, J. B. (2009). Phase-oriented surface segregation in an aluminium casting alloy. Applied Surface Science, 255(9), 4880-4885.
Abstract: There have been many reports of the surface segregation of minor elements, especially Mg, into surface layers and oxide films on the surface of Al alloys. LM6 casting alloy (Al–12%Si) represents a challenging system to examine such segregation as the alloy features a particularly inhomogeneous phase structure. The very low but mobile Mg content (approximately 0.001 wt.%), and the surface segregation of modifiers such as Na, mean the surface composition responds in a complex manner to thermal treatment conditions. X-ray photoelectron spectroscopy (XPS) has been used to determine the distribution of these elements within the oxide film. Further investigation by dynamic secondary ion mass spectrometry (DSIMS) confirmed a strong alignment of segregated Na and Mg into distinct phases of the structure. © 2009, Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.apsusc.2008.12.025
http://apo.ansto.gov.au/dspace/handle/10238/2233
ISSN: 0169-4332
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