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Ti 5 Al 2 C 3 : A New Ternary Carbide Belonging to MAX Phases in the Ti – Al – C System
Author(s) -
Wang Xiaohui,
Zhang Hui,
Zheng Liya,
Ma Yonghui,
Lu Xinpo,
Sun Yinjie,
Zhou Yanchun
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05158.x
Subject(s) - ternary operation , crystallography , materials science , molar ratio , crystal structure , analytical chemistry (journal) , mineralogy , chemistry , catalysis , biochemistry , computer science , programming language , chromatography
A new compound, Ti 5 Al 2 C 3 , 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 a = 0.3038 nm, c = 3.2261 nm, and the atomic positions are Ti 1 at 4 f (1/3, 2/3, 0.0208), Ti 2 at 4 f (1/3, 2/3, 0.1778), Ti 3 at 2 d (2/3, 1/3, 0.25), Al at 4 e (0, 0, 0.1035), C 1 at 2 a (0, 0, 0), and C 2 at 4 e (0, 0, 0.2102).