In situ diffraction study of thermal decomposition in Maxthal Ti2AlC
No Thumbnail Available
Date
2011-01-05
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The thermal stability of Ti2AlC at elevated temperature (1000–1550°C) in vacuum has been investigated using in situ neutron diffraction. At temperatures above 1400°C, Ti2AlC became unstable and began to decompose via sublimation of Al, resulting in a porous surface layer of TiCx being formed. The apparent activation energy for Ti2AlC decomposition was determined to be 85.7 ± 2.6 kJ mol−1. The kinetics of isothermal phase decomposition was modelled using least-squares linear regression fitting and the Avrami equation. The corresponding least-squares regression exponent (R2) and Avrami constants (k and n) for isothermal decomposition were determined to be 0.89, 0.268 min−n and 0.1, respectively. © 2011, Elsevier Ltd.
Description
Keywords
Ceramics, Neutron diffraction, Synchrotron radiation, Phase transformations, Titanium, Aluminium
Citation
Pang, W. K., Low, I. M., O'Connor, B. H., Peterson, V. K., Studer, A. J., Palmquist, J. P. (2011). In situ diffraction study of thermal decomposition in Maxthal Ti2AlC. Journal of Alloys and Compounds, 509(1), 172-176.