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In situ diffraction study of thermal decomposition in Maxthal Ti2AlC
- Source :
- Journal of Alloys and Compounds. 509:172-176
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
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.
Details
- ISSN :
- 09258388
- Volume :
- 509
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........5d2995746ccf37101d78765c7bd7642f