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Thermal cycling and reactivity of a MoSi2/ZrO2 composite designed for self-healing thermal barrier coatings

Nozahic, Franck and Monceau, Daniel and Estournès, Claude Thermal cycling and reactivity of a MoSi2/ZrO2 composite designed for self-healing thermal barrier coatings. (2016) Materials and Design, 94. 444-448. ISSN 0261-3069

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Official URL: http://dx.doi.org/10.1016/j.matdes.2016.01.054

Abstract

Consolidated (relative density of 84%) composite made of molybdenum di-silicide (MoSi2) particles dispersed in a yttria partially stabilized zirconia matrix (8Y2O3–Zr02) was prepared by spark plasma sintering. Cyclic oxidation of the composite at temperature ranging from 1000 °C to 1300 °C was studied. Parabolic rate constants (kp) values of the composite material are in good agreement with those obtained in the literature for the oxidation of bulk MoSi2. Following oxidation exposure, formation of Mo5Si3, SiO2 and ZrSiO4 phases was observed. These observations are compatible with the use of MoSi2 as a self-healing agent in YPSZ thermal barrier coatings.

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 and Design website : http://www.sciencedirect.com/science/journal/02641275
HAL Id:hal-01486885
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:10 Mar 2017 14:28

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