Abstract
An antiphase boundary of 1/2 <100> {110} type in equilibrium with atomic displacements is examined, such as occurs in an ordered alloy with Ll2 superlattice. The effects from discrepancies in the atomic radii are evaluated along with those from differences in atomic interaction in a parallel simulation of the lattice states near planar defects in ordered Cu3Au and Ni3Fe. It is found that there are substantial differences in the local deformations at these boundaries by comparison with other types of planar defect: there are parallel planes involving compression and stretching together with oscillating atomic displacements perpendicular to the boundary, which die away at the eighth plane from the APB. It is found that the region of local deformation out to which the continuum theory of elasticity does not apply extends to ten planes of {110} type.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 49–52, July, 1987.
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Starostenkov, M.D., Gorlov, N.V. & Dem'yanov, B.F. Atomic configurations of antiphase boundaries IN Lla superlattice alloys: APB of 1/2 <110> {110} type. Soviet Physics Journal 30, 606–608 (1987). https://doi.org/10.1007/BF00895228
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DOI: https://doi.org/10.1007/BF00895228