Abstract
The hot corrosion performance of the Mo–Si–B-based oxidation protection coating was evaluated. Mo coins coated by a Si–B pack cementation process were covered with a salt slurry and exposed to air at high temperature. This resulted in gradual mass losses attributed to spallation, as well as crystallization of the vitreous silica scale to cristobalite. Still air resulted in more severe attack than flowing air, owing to the stability of the salt scale that is established in stagnant air. Despite the hot corrosion attack, the coating retains the majority of the vulnerable Mo substrate after repeated thermal cycles for temperatures up to 1300 °C.
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References
J. H. Perepezko and R. Sakidja, Jom 62, 13 (2010).
I. P. Downs, J. H. Perepezko, R. Sakidja and S. R. Choi, Surface & Coatings Technology 239, 138 (2014).
N. Eliaz, G. Shemesh and R. M. Latanision, Engineering Failure Analysis 9, 31 (2002).
R. A. Rapp, Corrosion Science 44, 209 (2002).
F. Pettit, Oxidation of Metals 76, 1 (2011).
M. G. Lawson, H. R. Kim, F. S. Pettit and J. R. Blachere, Journal of the American Ceramic Society 73, 989 (1990).
D. E. Damby, E. W. Llewellin, C. J. Horwell, B. J. Williamson, et al., Journal of Applied Crystallography 47, 1205 (2014).
V. Presser, A. Loges, R. Wirth and K. G. Nickel, Journal of the American Ceramic Society 92, 1796 (2009).
R. Bianco, R. Rapp, in Metallurgical and Ceramic Protective Coatings, ed. K. Stern, (Springer, Netherlands, 1996). p. 236.
F. A. Rioult, S. D. Imhoff, R. Sakidja and J. H. Perepezko, Acta Materialia 57, 4600 (2009).
P. J. Ritt, P. A. Williams, S. C. Splinter and J. H. Perepezko, Journal of the European Ceramic Society 34, 3521 (2014).
L. F. Su, O. Lu-Steffes, H. Zhang and J. H. Perepezko, Applied Surface Science 337, 38 (2015).
P. Ritt, R. Sakidja and J. H. Perepezko, Surface & Coatings Technology 206, 4166 (2012).
P. Ritt, O. Lu-Steffes, R. Sakidja, J. H. Perepezko, et al., Journal of Thermal Spray Technology 22, 992 (2013).
N. S. Jacobson, Oxidation of Metals 31, 91 (1989).
K. S. Goto and R. A. Rapp, Journal of the Electrochemical Society 125, C371 (1978).
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The support of ONR (N00014-10-1-0913) is gratefully acknowledged.
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Taylor, M., Perepezko, J.H. Hot Corrosion of Mo–Si–B Coatings. Oxid Met 87, 705–715 (2017). https://doi.org/10.1007/s11085-017-9773-x
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DOI: https://doi.org/10.1007/s11085-017-9773-x