Ti5Al2C3: A New Ternary Carbide Belonging to MAX Phases in the TiAlC System

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Abstract:

A new compound, Ti5Al2C3, is identified in the bulk sample prepared by reactive hot pressing a mixture of Ti, Al and graphite powders with a nominal molar ratio of Ti:Al:C = 5:2.15:2.78 at 1580°C for 1 h. This compound follows the crystal structure of other MAX phases. The lattice parameters are = 0.3038 nm, = 3.2261 nm, and the atomic positions are Ti1 at 4f (1/3, 2/3, 0.0208), Ti2 at 4f (1/3, 2/3, 0.1778), Ti3 at 2d (2/3, 1/3, 0.25), Al at 4e (0, 0, 0.1035), C1 at 2a (0, 0, 0), and C2 at 4e (0, 0, 0.2102).

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2012.05158.x

Publication date: May 1, 2012

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