In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC
The thermal stability of Ti(2)AlC at elevated temperature (1000–1550 °C) in vacuum has been investigated using in situ neutron diffraction. At temperatures above 1400 °C, Ti(2)AlC became unstable and began to decompose via sublimation of Al, resulting in a porous surface layer of TiCx being formed....
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier B.V.
2011
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/10046 |
| _version_ | 1848746121921298432 |
|---|---|
| author | Pang, W. Low, It-Meng (Jim) O'Connor, Brian Peterson, V. Studer, A. Palmquist, J. |
| author_facet | Pang, W. Low, It-Meng (Jim) O'Connor, Brian Peterson, V. Studer, A. Palmquist, J. |
| author_sort | Pang, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The thermal stability of Ti(2)AlC at elevated temperature (1000–1550 °C) in vacuum has been investigated using in situ neutron diffraction. At temperatures above 1400 °C, Ti(2)AlC 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. |
| first_indexed | 2025-11-14T06:28:13Z |
| format | Journal Article |
| id | curtin-20.500.11937-10046 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:28:13Z |
| publishDate | 2011 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-100462017-09-13T16:08:12Z In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC Pang, W. Low, It-Meng (Jim) O'Connor, Brian Peterson, V. Studer, A. Palmquist, J. Phase transitions Ceramics Synchrotron radiation Neutron diffraction The thermal stability of Ti(2)AlC at elevated temperature (1000–1550 °C) in vacuum has been investigated using in situ neutron diffraction. At temperatures above 1400 °C, Ti(2)AlC 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 Journal Article http://hdl.handle.net/20.500.11937/10046 10.1016/j.jallcom.2010.09.019 Elsevier B.V. restricted |
| spellingShingle | Phase transitions Ceramics Synchrotron radiation Neutron diffraction Pang, W. Low, It-Meng (Jim) O'Connor, Brian Peterson, V. Studer, A. Palmquist, J. In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title | In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title_full | In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title_fullStr | In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title_full_unstemmed | In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title_short | In situ diffraction study of thermal decomposition in Maxthal Ti(2)AlC |
| title_sort | in situ diffraction study of thermal decomposition in maxthal ti(2)alc |
| topic | Phase transitions Ceramics Synchrotron radiation Neutron diffraction |
| url | http://hdl.handle.net/20.500.11937/10046 |