Publication date: 2023

DOI: 10.1007/s12540-022-01321-6

Abstract: The structure and energy of planar superstructure defects (PSDs) in ordered alloys with the L1 superstructure are analyzed using an approach based on the analysis of the translational and point symmetry of the structure and the summation of pairwise interatomic bonds across the defect plane. The symmetry analysis of the alloy revealed six superstructure domains and one antiphase vector. Analytical expressions are obtained for calculating the sublimation energy and the energy of an arbitrary PSD under the assumption of pairwise interatomic interactions and neglecting the tetragonality of the alloy and the relaxation of atoms due to the difference in the atomic radii of the components. An expression is derived for finding all possible planes of conservative antiphase boundaries. The presented results are useful for analyzing slip systems and classifying possible PSDs in L1 ordered alloys. Graphical abstract: [Figure not available: see fulltext.]. © 2022, The Author(s) under exclusive licence to The Korean Institute of Metals and Materials.

Издатель: Korean Institute of Metals and Materials

Тип: Article