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High‐resolution electron microscopy on incommensurate long‐period superstructures of hexagonal‐close‐packed Cu–Sb alloy
Author(s) -
Onozuka T.,
Kakehashi S.,
Takahashi T.,
Hirabayashi M.
Publication year - 1989
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/s0021889889001494
Subject(s) - superstructure , hexagonal crystal system , electron microscope , materials science , crystallography , alloy , domain (mathematical analysis) , resolution (logic) , honeycomb , close packing of equal spheres , scanning electron microscope , condensed matter physics , optics , chemistry , physics , composite material , thermodynamics , mathematical analysis , mathematics , artificial intelligence , computer science
Hexagonal incommensurate long‐period superstructures of the Cu–Sb alloys containing 18–20 at.% Sb have been investigated by means of superstructure imaging using a high‐resolution electron microscope. Honeycomb‐type distributions of hexagonal domains consisting of the commensurate superstructure of type 7 a 0 ‐2 H are observed. The incommensurabilities of superstructure can be interpreted well with a hexagonal model composed of the 7 a 0 ‐2 H domains surrounded by domain walls which contain higher Sb content than the domain interior. The observed image contrast is reproduced well with multislice computer simulations based on the structure models proposed for the 7 a 0 ‐2 H domain and the domain wall.