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A study of formation and growth of the anodised surface layer on cast Al-Si alloys based on different analytical techniques
Jonköping University, Sweden.
Jonköping University, Sweden.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0001-9140-6724
Jonköping University, Sweden.
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2016 (Engelska)Ingår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 101, s. 254-262Artikel i tidskrift (Refereegranskat) Published
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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. (C) 2016 Elsevier Ltd. All rights reserved.

Ort, förlag, år, upplaga, sidor
Elsevier, 2016. Vol. 101, s. 254-262
Nyckelord [en]
Al-Si cast alloys; Anodising; Oxide layers; Silicon
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Fysik
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URN: urn:nbn:se:liu:diva-128713DOI: 10.1016/j.matdes.2016.04.013ISI: 000375413100032OAI: oai:DiVA.org:liu-128713DiVA, id: diva2:933919
Anmärkning

Funding Agencies|Knowledge Foundation (RHEOCAL, as part of CompCast) [201000280]

Tillgänglig från: 2016-06-07 Skapad: 2016-05-30 Senast uppdaterad: 2017-11-30

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Persson, Per O A

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