Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440842 | Journal of the European Ceramic Society | 2017 | 9 Pages |
Abstract
Oxidation of commercial Ti2AlC MAX phase powders at 200-1000 °C has been investigated by XRD, XPS, SEM, STA and TGA coupled with FTIR. These powders are a mixture of Ti2AlC, Ti3AlC2, TiC and Ti1.2Al0.8. Oxidation at 400 °C led to disappearance of carbide phases from Ti 2p, Al 2p and C 1s XPS spectra. At 600 °C, powders changed from dark grey to light grey with a significant volume increase due to crack formation. Powders were severely oxidized by detecting rutile with minor anatase TiO2. At 800 °C, α-Al2O3 was detected while anatase transformed into rutile TiO2. The cracks were healed and disappeared. At 1000 °C, the Ti2AlC powders were fully oxidized into rutile TiO2 and α-Al2O3 with a change of powder color from light grey to yellow. FTIR detected the release of C as CO2 from 200 °C onwards but with additional CO above 800 °C.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Zheng Zhang, Suo Hon Lim, Doreen Mei Ying Lai, Sze Yu Tan, Xue Qi Koh, Jianwei Chai, Shi Jie Wang, Hongmei Jin, Ji Sheng Pan,