Microstructural evolution during high-temperature oxidation of Ti2AlN ceramics

Bai Cui, Rafael Sa, Daniel Jayaseelan, Fawad Inam, Michael Reece, William Edward Lee

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Pages (from-to)106-111
JournalAdvances in Science and Technology
Volume65
DOIs
Publication statusPublished - 2010

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