Oquab, Djar and Xu, Nan and Monceau, Daniel and Young, David Subsurface microstructural changes in a cast heat resisting alloy caused by high temperature corrosion. (2010) Corrosion Science, vol. 5 (n° 1). pp. 255-262. ISSN 0010-938X
|(Document in English) |
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Official URL: http://dx.doi.org/10.1016/j.corsci.2009.09.014
A cast HP ModNb alloy (Fe–25Cr–35Ni–1Nb, wt.%) was oxidised and carburised in CO–CO2 corresponding to aC = 0.1 and pO2 = 3 1016 atm at 1080 C. Formation of an external, chromium-rich oxide scale led to depletion of this metal in a deep alloy subsurface zone. Within that zone, secondary chromium-rich carbides dissolved, primary carbides oxidised, solute silicon and aluminium internally oxidised, and extensive porosity developed. Pore volumes correspond to the difference between metal loss by scaling and metal displacement by internal oxidation, assuming the scale–metal interface to be fixed. The pores are concluded to be Kirkendall voids.
|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 Corrosion Science website : http://www.sciencedirect.com/science/journal/0010938X|
|Audience (journal):||International peer-reviewed journal|
|Institution:|| Université de Toulouse > Institut National Polytechnique de Toulouse - INPT|
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Other partners > University of New South Wales - UNSW (AUSTRALIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
|Deposited By:||Nihad Lahdifi|
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