Microstructural evolution during high-temperature oxidation of Ti2AlN ceramics

Cui, Bai, Sa, Rafael, Jayaseelan, Daniel, Inam, Fawad, Reece, Michael and Lee, William Edward (2010) Microstructural evolution during high-temperature oxidation of Ti2AlN ceramics. Advances in Science and Technology, 65. pp. 106-111. ISSN 1662-0356

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/AST.6...

Abstract

Microstructural evolution of Ti2AlN ceramics during high-temperature oxidation in air has been revealed by X-ray diffraction (XRD), field emission gun scanning electron microscopy FEGSEM), and energy-dispersive spectroscopy (EDS). After oxidation below 1200 ºC, layered microstructures formed on Ti2AlN surfaces containing anatase, rutile, and α-Al2O3. Above 1200 ºC, more complex layered microstructures formed containing Al2TiO5, rutile, α-Al2O3, and continuous void layers. With increasing temperature, anatase gradually transformed to rutile, and TiO2 reacted with α-Al2O3 to form Al2TiO5. Based on these microstructural observations, an oxidation mechanism for Ti2AlN ceramics is proposed.

Item Type: Article
Uncontrolled Keywords: MAX Phase, microstructure, oxidation
Subjects: F200 Materials Science
H300 Mechanical Engineering
H400 Aerospace Engineering
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 24 May 2013 15:21
Last Modified: 10 Aug 2015 11:23
URI: http://nrl.northumbria.ac.uk/id/eprint/12669

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