NDLI: Influence of yttrium as alloying element on the oxidation at 1100°C of a model alumina-forming alloy

Content Provider	EDP Sciences
Author	C. Issartel H. Buscail E. Caudron R. Cueff F. Riffard S. El Messki S. Chevalier
Abstract	In order to study the effect of yttrium as an alloying element, 0.093 wt% yttrium was incorporated into the model Fe-20Cr-5Al alloy to give the FeCrAl-0.1Y substrate. During isothermal oxidation and thermal cycling tests, we have observed that yttrium has a beneficial effect on the oxidation behavior in air at 1100°C. In situ X-Ray diffraction allowed to demonstrate that yttrium favors a preferential crystallographic orientation of the α-Al_{2_{O_{3_{scale. Glancing angle X-ray diffraction on a sample oxidized during 1000 hours under thermal cycling conditions indicates that yttrium is located at the internal interface as Y_{3_{A1_{5_{O_{12_{. We think that the beneficial effect of yttrium on high temperature oxidation of the model alloy is due to its location at the internal interface and to the new crystallographic structure of the scale induced by the presence of Y_{3_{Al_{5_{O_{l2_.}}}}}}}}}}}}}}}
Ending Page	80
Starting Page	77
Page Count	4
File Format	HTM / HTML PDF
ISSN	00326895
Alternate Webpage(s)	https://www.mattech-journal.org/articles/mattech/abs/2003/07/mattech20039107p77/mattech20039107p77.html
e-ISSN	17783771
Issue Number	7-8-9
Journal	Matériaux & Techniques
Volume Number	91
DOI	10.1051/mattech/200391070077
Language	English
Publisher	EDP Sciences
Publisher Date	2003-01-01
Access Restriction	Subscribed
Rights Holder	© SIRPE 2003
Content Type	Text
Resource Type	Article
Subject	Materials Science

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