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{111}‐specific twinning structures in nonstoichiometric ZrC 0.6 with ordered carbon vacancies
Author(s) -
Hu Wentao,
Liu Shaocun,
Wen Bin,
Xiang Jianyong,
Wen Fusheng,
Xu Bo,
He Julong,
Yu Dongli,
Tian Yongjun,
Liu Zhongyuan
Publication year - 2013
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889812046018
Subject(s) - crystal twinning , materials science , transmission electron microscopy , macle , crystallography , stoichiometry , electron diffraction , carbon fibers , condensed matter physics , diffraction , chemistry , nanotechnology , microstructure , metallurgy , composite material , physics , optics , composite number
Twinning structures in ordered nonstoichiometric ZrC 0.6 have been investigated experimentally and theoretically. Via transmission electron microscopy and selected area electron diffraction measurements, {111}‐specific twins have been observed. Interestingly, two special types of twinning interfaces, i.e. (111) C and (111) Zr interfaces, are recognized to be formed as a result of the presence of ordered carbon vacancies. In contrast to the high stacking fault energy for twinning formation in stoichiometric ZrC, first‐principles calculations indicate that the presence of ordered carbon vacancies leads to a great reduction in the twinning interfacial energy, thus favouring the stabilization of twinning structures in the ordered ZrC 0.6 .