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Crystal Structure and Theoretical Elastic Property of a New Ternary Ceramic HfAl 4 C 4
Author(s) -
Nian Hongqiang,
He Lingfeng,
Li Fangzhi,
Wang Jingyang,
Zhou Yanchun
Publication year - 2010
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.1551-2916.2009.03543.x
Subject(s) - ternary operation , lattice constant , materials science , crystal structure , bulk modulus , shear modulus , crystallography , elastic modulus , ceramic , transmission electron microscopy , diffraction , modulus , young's modulus , composite material , chemistry , nanotechnology , optics , physics , computer science , programming language
HfAl 4 C 4 , a new ternary aluminum carbide, was discovered and its crystal structure was determined by a combination of X‐ray diffraction, transmission electron microscopy, and first‐principles calculations. The crystal structure is trigonal belonging to thespace group. The refined lattice constants are a =0.3308 nm, c =2.190 nm. First‐principles method was used to calculate the theoretical second‐order elastic constants, bulk modulus, shear modulus, and the Young's modulus of HfAl 4 C 4 . It shows that HfAl 4 C 4 has relatively high elastic stiffness.