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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2915

Title: In situ diffraction study of thermal decomposition in Maxthal Ti2AlC.
Authors: Pang, WK
Low, IM
O'Connor, BH
Peterson, VK
Studer, AJ
Palmquist, JP
Keywords: Ceramics
Neutron Diffraction
Synchrotron Radiation
Phase Transformations
Titanium
Aluminium
Issue Date: 5-Jan-2011
Publisher: Elsevier
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.
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.
URI: http://dx.doi.org/10.1016/j.jallcom.2010.09.019
http://apo.ansto.gov.au/dspace/handle/10238/2915
ISSN: 0925-8388
Appears in Collections:Journal Articles

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