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High-temperature oxidation kinetics of NiAl single crystal and oxide spallation as a function of crystallographic orientation

Poquillon, Dominique and Oquab, Djar and Viguier, Bernard and Senocq, François and Monceau, Daniel High-temperature oxidation kinetics of NiAl single crystal and oxide spallation as a function of crystallographic orientation. (2004) Materials Science and Engineering A, vol. 381 (n° 1 - 2). ISSN 0921-5093

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Official URL: http://dx.doi.org/10.1016/j.msea.2004.04.009

Abstract

Isothermal and cyclic high-temperature oxidation of NiAl single crystal samples are presented. Oxidations have been carried out at 900, 1050, 1100 and 1150 ◦C on (1 0 0) and (1 1 0) oriented surface. Continuous thermogravimetry in cyclic conditions allows isothermal oxidation kinetics and spalling at each cycle to be followed. Oxidation kinetics are compared between (1 0 0) surface and (1 1 0) surface. (1 0 0) oriented surfaces appeared to oxidize slightly faster than (1 1 0) oriented surfaces. Experimental results of cyclic oxidation are compared to simulated results using a previously published statistical model. Spalling increases when the average oxide scale thickness increases with the number of cycles. Longer tests are necessary to study this evolution during the ’steady-state’ but no critical oxide thickness was found.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Materials Science and Engineering: A website : http://www.sciencedirect.com/science/journal/09215093
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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