| Titre : | Short-term oxidation and hot corrosion resistance of a gradient CrN/Cr1−xAlxN coating (2011) |
| Auteurs : | M. Zhu, Auteur ; J. J. Xu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Materials and corrosion (Vol. 61 N° 11, Novembre 2010) |
| Article en page(s) : | pp. 939–946 |
| Note générale : | Génie mécanique |
| Langues : | Anglais |
| Tags : | Gradient CrN/Cr1− ; xAlxN coating ; hot-corrosion ; magnetron sputtering ; oxidation |
| Résumé : | A CrN/Cr1−xAlxN coating comprised of an inner layer of CrN and an outer layer of Cr1−xAlxN with a gradient distribution of Al was deposited on two different alloys by a reactive sputtering method. Oxidation and hot-corrosion tests of the gradient CrN/Cr1−xAlxN coating were performed at different temperatures. The phase compositions and morphologies of the as-deposited coating and the corrosion products were investigated by using XRD and SEM/EDS. The results showed that the gradient CrN/Cr1−xAlxN coating exhibited good oxidation resistance at temperatures above 1000 °C owing to the formation of an α-Al2O3-rich oxide scale. The coating possessed good hot-corrosion resistance in molten sulfate because the inner CrN layer could supply enough Cr to form a relatively protective Cr2O3 after the Al2O3-enriched scale failed due to its dissolution in the molten sulfate. |
| En ligne : | http://onlinelibrary.wiley.com/doi/10.1002/maco.200905376/abstract |
