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A study of formation and growth of the anodised surface layer on cast AlSi alloys based on different analytical techniques
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-8098-4788
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0001-6481-5530
Thin Film Physics Division, Department of Physics, Chemistry and Biology, Linköping University.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-0101-0062
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2016 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 101, 254-262 p.Article in journal (Refereed) Published
Abstract [en]

This paper aims to investigate the mechanisms of formation and growth of the anodised surface layer on Al-Si castings by applying different analytical techniques such as optical microscopy, scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and X-ray computer tomography (X-ray CT) scanning. Three different Al alloys with various Si content (2.43%, 3.53% and 5.45%) were investigated. Si particle morphological modification by Sr addition, as well as directional solidification, was used to vary the microstructural coarseness in a controlled manner to study the influence of these parameters on the growth behaviour of the oxide layer. This study observed residual unanodised Al phases trapped beneath or between Si particles in the oxide layer. It was found, depending on the geometry and morphology of Si particles, that Al can be shielded by Si particles and prevented from oxidising.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 101, 254-262 p.
Keyword [en]
Al-Si cast alloys, Anodising, Oxide layers, Silicon
National Category
Engineering and Technology Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-29789DOI: 10.1016/j.matdes.2016.04.013ISI: XYZOAI: oai:DiVA.org:hj-29789DiVA: diva2:920583
Available from: 2016-04-18 Created: 2016-04-18 Last updated: 2017-01-26Bibliographically approved

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Zhu, BaiweiSeifeddine, SalemJarfors, Anders E.W.Leisner, PeterZanella, Caterina
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JTH. Research area Materials and manufacturing – CastingJTH. Research area Materials and manufacturing - Surface technology
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