Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antiphase Boundary Energy Determination in Superlattices Based on the BCC Lattice Using the Cluster Variation Method

Full text
Author(s):
Schon, Claudio Geraldo [1] ; Kikuchi, Ryoichi [2]
Total Authors: 2
Affiliation:
[1] Univ Sao Paulo, Escola Politecn, Sao Paulo - Brazil
[2] Univ Calif Berkeley, Berkeley, CA 94720 - USA
Total Affiliations: 2
Document type: Journal article
Source: International Journal of Materials Research; v. 89, n. 12, p. 868-878, DEC 29 2021.
Web of Science Citations: 0
Abstract

Energies of unrelaxed antiphase boundaries (APBs) right after they are formed are formulated and calculated for the B2 and D0(3) structures, using the numerical results of the (irregular) tetrahedron approximation of CVM, which takes into account the first and second neighbour interactions. Three cases, a(0) < 100 > (001), a(0) < 100 > (01 (1) over bar) and a(0)/2 < 1 (11) over bar > (01 (1) over bar) are treated. The numerical results obtained for the bcc Fe-Al system at 1000 K and 623 K show that the APB energies for the first two cases are negligibly small except for the stability region of the D0(3); phase at 623 K. Use of the tetrahedron approximation makes it possible to clearly reveal the effect of the short-range order. (AU)