Microstructural Evolution during High-Temperature Oxidation of Ti2AlN Ceramics

Abstract:

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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 °C, layered microstructures formed on Ti2AlN surfaces containing anatase, rutile, and α-Al2O3. Above 1200 °C, 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.

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Periodical:

Edited by:

Pietro VINCENZINI, Sheldon WIEDERHORN and Paolo COLOMBO

Pages:

106-111

DOI:

10.4028/www.scientific.net/AST.65.106

Citation:

B. Cui et al., "Microstructural Evolution during High-Temperature Oxidation of Ti2AlN Ceramics", Advances in Science and Technology, Vol. 65, pp. 106-111, 2010

Online since:

October 2010

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$35.00

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