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Journal article
Structure of a new bulk Ti5Al2C3 MAX phase produced by the topotactic transformation of Ti2AlC
Journal of the European Ceramic Society, v 32(12), pp 3485-3491
01 Sep 2012
Abstract
Upon annealing cold-pressed Ti2AlC,-325 mesh powders, at 1500 degrees C for 8 h in argon, the resulting partially sintered sample contained 43(+/- 2) wt.% of the layered ternary carbide Ti5Al2C3. Herein, the X-ray powder diffraction pattern of Ti5Al2C3 is reported for the first time and its structure and stoichiometry are confirmed through high-resolution transmission electron microscopy. This phase has a trigonal structure (space group P3m1) with a unit cell consisting of 3 formula units and cell parameters of a=3.064 angstrom, c = 48.23 angstrom. The lattice parameters determined through first principles calculations agree reasonably well with the experimentally determined values. At 147.1 GPa, the calculated bulk modulus falls between the bulk moduli of Ti2AlC and Ti3AlC2. The transformation from Ti2AlC to Ti5Al2C3 is topotactic. (C) 2012 Elsevier Ltd. All rights reserved.
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Details
- Title
- Structure of a new bulk Ti5Al2C3 MAX phase produced by the topotactic transformation of Ti2AlC
- Creators
- Nina J. Lane - Drexel UniversityMichael Naguib - Drexel UniversityJun Lu - Linköping UniversityLars Hultman - Linköping UniversityMichel W. Barsoum - Drexel University
- Publication Details
- Journal of the European Ceramic Society, v 32(12), pp 3485-3491
- Publisher
- Elsevier
- Number of pages
- 7
- Grant note
- Commonwealth of Pennsylvania's Ben Franklin Technology Development Authority through the Ben Franklin Technology Partners of Southeastern Pennsylvania Swedish Foundation for Strategic Research (SSF); Swedish Foundation for Strategic Research DGE-0654313 / Integrated Graduate Education and Research Traineeship (IGERT) under NSF DE-AC02-05CH11231; 6951370 / Office of Vehicle Technologies of the U.S. Department of Energy; United States Department of Energy (DOE) Swedish Research Council (VR); Swedish Research Council
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000306298300053
- Scopus ID
- 2-s2.0-84862507317
- Other Identifier
- 991019168849804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Ceramics