This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1007/s11085-009-9176-8 in citations.
High temperature oxidation of the Al3Mg2 complex metallic alloy
High temperature oxidation of the Al3Mg2 complex metallic alloy
High temperature air oxidation of the Al3Mg2 complex metallic alloy was investigated on powder samples and bulk polycrystals in the temperature range 350-420 A degrees C by thermogravimetric measurements, SEM and TEM. Oxidation at 420 A degrees C on the polycrystalline samples comprised three succes...
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Personal Name(s): | de Noirfontaine, M.N. |
---|---|
Baldinozzi, G. / Barthes-Labrousse, M.G. / Kusinski, J. / Boemare, G. / Herinx, M. / Feuerbacher, M. | |
Contributing Institute: |
Mikrostrukturforschung; IFF-8 |
Published in: | Oxidation of metals, 73 (2010) |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2010
|
DOI: |
10.1007/s11085-009-9176-8 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Oxidation of Metals
73 |
Subject (ZB): | |
Publikationsportal JuSER |
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520 | |a High temperature air oxidation of the Al3Mg2 complex metallic alloy was investigated on powder samples and bulk polycrystals in the temperature range 350-420 A degrees C by thermogravimetric measurements, SEM and TEM. Oxidation at 420 A degrees C on the polycrystalline samples comprised three successive phases characterised by linear kinetics laws. The first stage corresponded to the formation of a porous non adherent nanocrystalline MgO scale having a cauliflower morphology. A first acceleration in the kinetics law was ascribed to the nucleation and growth of MgAl2O4 crystallites which form a thin (similar to 10 nm) film at the interface between the substrate alloy and the MgO top layer. A new linear regime was observed in the oxidation process corresponding to diffusion of magnesium through the grain boundaries of the spinel film and through the porous MgO layer. Finally, fragmentation and cracking of the scale leads to a further acceleration followed by a new linear regime. | ||
653 | 2 | 0 | |2 Author |a Al3Mg2 |
653 | 2 | 0 | |2 Author |a Complex metallic alloys |
653 | 2 | 0 | |2 Author |a Intermetallics |
653 | 2 | 0 | |2 Author |a Aluminium alloys |
653 | 2 | 0 | |2 Author |a Oxidation kinetics |
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500 | |a This work was supported by the 6th Framework EU Network of Excellence "Complex Metallic Alloys'' (Contract No. NMP3-CT-2005-500140). Fruitful discussions with Prof. A.-M. Huntz (ICMMO/ LEMHE, University of Orsay) are gratefully acknowledged. A. Allavena-Valette (CECM, CNRS) is warmly thanked for her contribution to the SEM analyses. | ||
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