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@article{1335753,
author = {Paidar, Václav and Cak, M. and Šob, Mojmír and Inui, H.},
article_location = {Warsaw, Poland},
article_number = {4},
doi = {http://dx.doi.org/10.12693/APhysPolA.128.589},
keywords = {C54 STRUCTURES; CRYSTALS; C11(B); MOSI2; C40},
language = {eng},
issn = {0587-4246},
journal = {Acta physica polonica A},
title = {What Types of Stacking Faults and Dislocation Dissociations Can Be Found in Transition-Metal Disilicides},
url = {http://przyrbwn.icm.edu.pl/APP/PDF/128/a128z4p29.pdf},
volume = {128},
year = {2015}
}
TY - JOUR
ID - 1335753
AU - Paidar, Václav - Cak, M. - Šob, Mojmír - Inui, H.
PY - 2015
TI - What Types of Stacking Faults and Dislocation Dissociations Can Be Found in Transition-Metal Disilicides
JF - Acta physica polonica A
VL - 128
IS - 4
SP - 589-591
EP - 589-591
PB - POLISH ACAD SCIENCES INST PHYSICS
SN - 05874246
KW - C54 STRUCTURES
KW - CRYSTALS
KW - C11(B)
KW - MOSI2
KW - C40
UR - http://przyrbwn.icm.edu.pl/APP/PDF/128/a128z4p29.pdf
L2 - http://przyrbwn.icm.edu.pl/APP/PDF/128/a128z4p29.pdf
N2 - Identical atomic planes of transition-metal disilicides can form different stacking when they are ordered in several combinations of four different positions A, B, C, D. The following arrangements can be formed: AB in C11(b) structure of e.g. MoSi2, ABC in C40 structure of e.g. VSi2 and ABDC in C54 structure of e.g. TiSi2 disilicides. The ABC atomic plane stacking along the < 111 > cubic directions is well known in the fcc lattice, where three basic types of stacking faults are known: intrinsic or extrinsic faults and elementary twin, however, other types of stacking faults can be detected in transition-metal disilicides due to the occurrence of the fourth position D. On the other hand, the faults well known in metallic systems as antiphase boundaries need not be metastable in disilicides. Based on the results of ab initio calculations, it can be predicted which types of planar defects are metastable corresponding to the local minima on the energy surface of generalized stacking faults or unstable when they are represented, for example, by saddle points. The character of dissociation of the dislocation cores is directly related to the existence of metastable stacking faults. Moreover, the space distribution of dislocation cores has a direct impact on dislocation mobility and, therefore, also on macroscopic mechanical properties of materials. The behaviour of extended crystal defects in disilicides that is caused by covalent interatomic bonding, is discussed starting from the geometrical analysis, and it is demonstrated that predictions of materials properties can be deduced.
ER -
PAIDAR, Václav, M. CAK, Mojmír ŠOB a H. INUI. What Types of Stacking Faults and Dislocation Dissociations Can Be Found in Transition-Metal Disilicides. \textit{Acta physica polonica A}. Warsaw, Poland: POLISH ACAD SCIENCES INST PHYSICS, 2015, roč.~128, č.~4, s.~589-591. ISSN~0587-4246. Dostupné z: https://dx.doi.org/10.12693/APhysPolA.128.589.
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