High Temperature Oxidation and Electrochemical Investigations on Nickel-base Alloys [Elektronische Ressource] / Marthe Georgia Obigodi-Ndjeng. Betreuer: Sannakaisa Virtanen

Georgia

Description

High Temperature Oxidation and Electrochemical Investigations on Nickel-base Alloys (Hoch-Temperatur Oxidation und elektrochemische Untersuchungen an Nickel-Basis Legierungen) Der Technischen Fakultät der Universität Erlangen-Nürnberg zur Erlangung des Grades DOKTOR-INGENIEUR vorgelegt von Frau Dipl.-Ing. Georgia Obigodi-Ndjeng Erlangen - 2011 Als Dissertation genehmigt von Der Technischen Fakultät der Universität Erlangen-Nürnberg Tag der Einreichung: 10.03.2011 Tag der Promotion: 31.05.2011 Dekan: Prof. Dr.-Ing. R. German Berichterstatter: Prof. Dr. sec. Techn. S. Virtanen, Prof. Dr.-Ing. U. Glatzel Abstract This study examined high-temperature oxidation behavior of different Ni-base alloys. In addition, electrochemical characterization of the alloy’s corrosion behavior was carried out, including comparison of the properties of native passive films grown at room temperature and high temperature oxide scales. PWA 1483 (single-crystalline Ni-base superalloy) and model alloys Ni-Cr-X (where X is either Co or Al) were oxidized at 800 and 900 °C in air for different time periods. The superalloy showed the best oxidation behavior at both temperatures, which might be due to the fact that the oxidation growth function is subparabolic for the model alloys and parabolic for the superalloy at 800 °C.

Informations

• Publié par: friedrich-alexander-universitat_erlangen-nurnberg
• Publié le: 01 janvier 2011
• Nombre de lectures: 46
• Langue: English
• Poids de l'ouvrage: 13 Mo

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