Z. Zhang, S.H. Lim, D.M.Y. Lai, S.Y. Tan, X.Q. Koh, J. Chai, S.J. Wang, H. Jin, J.S. Pan, Probing the oxidation behavior of Ti2AlC MAX phase powders between 200 and 1000 °C, J. Eur. Ceram. Soc., 37 (2017) 43-51.
Oxidation of commercial Ti2AlC MAX phase powders at 200 ~ 1000 oC has been investigated by XRD, XPS, SEM, TGA-FTIR. These Ti2AlC MAX phase powders are a mixture of Ti2AlC, Ti3AlC2 and TiC. Oxidation at 400 oC led to disappearance of XPS peaks associated with carbide phases in Ti 2p, Al 2p and C 1s spectra in the top surface layer. At 600 oC, XRD detected formation of rutile TiO2 with a change of powder’s color from dark to light grey and a significant increase of powders’ volume due to cracks formation. At 800 oC, -Al2O3 phase was detected while the cracks were completely healed and disappeared. At 1000 oC, the Ti2AlC powders were fully oxidized into rutile TiO2 and -Al2O3 with a change of powder color from light grey to yellow. FTIR detected the release of C as CO2 from 200 oC onwards with additional CO above 800 oC.
This project was funded by Science and Engineering Research Council (SERC) and supported by Aerospace Program of A*STAR (Grant No: 112 155 0702).