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Electrochemical corrosion of silicon carbide ceramics / U. Sydow in Materials and corrosion, Vol. 61 N° 8 (Août 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 8 (Août 2010) . - pp. 657–664 Titre : Electrochemical corrosion of silicon carbide ceramics Type de document : texte imprimé Auteurs : U. Sydow, Auteur ; M. Schneider, Auteur ; M. Herrmann, Auteur Année de publication : 2010 Article en page(s) : pp. 657–664 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion;  silicon  carbide Résumé : Recently, SiC-based ceramics have been found to exhibit corrosion damage patterns, which can only be explained by electrochemical processes. Therefore, the current work focusses on the electrochemical test procedures to determine the corrosion behaviour of solid state sintered silicon carbide (SSiC) ceramics in acidic and alkaline media. The corrosion current densities have been determined from linear voltammetric scans. At anodic polarization potentials, electrochemically induced etching patterns were observed in alkaline solution. The formation of pores and crevices during electrochemical oxidation in acidic solution could be monitored by field emission scanning electron microscopy (FESEM) in addition to transmission electron microscopy (TEM). Impedance spectra measured after anodic polarization could be described by the assumption of a pore model equivalent circuit. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905448/abstract [article] Electrochemical corrosion of silicon carbide ceramics [texte imprimé] / U. Sydow, Auteur ; M. Schneider, Auteur ; M. Herrmann, Auteur . - 2010 . - pp. 657–664. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 8 (Août 2010) . - pp. 657–664 Mots-clés : Corrosion;  silicon  carbide Résumé : Recently, SiC-based ceramics have been found to exhibit corrosion damage patterns, which can only be explained by electrochemical processes. Therefore, the current work focusses on the electrochemical test procedures to determine the corrosion behaviour of solid state sintered silicon carbide (SSiC) ceramics in acidic and alkaline media. The corrosion current densities have been determined from linear voltammetric scans. At anodic polarization potentials, electrochemically induced etching patterns were observed in alkaline solution. The formation of pores and crevices during electrochemical oxidation in acidic solution could be monitored by field emission scanning electron microscopy (FESEM) in addition to transmission electron microscopy (TEM). Impedance spectra measured after anodic polarization could be described by the assumption of a pore model equivalent circuit. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905448/abstract