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Title: Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
Author: Jurado Cardelús, Mariàngels
Mañosa, Lluís
Planes Vila, Antoni
Keywords: Transformacions de fase (Física estadística)
Diagrames de fase
Transformacions martensítiques
Phase transformations (Statistical physics)
Phase diagrams
Martensitic transformations
Issue Date: 1993
Publisher: The American Physical Society
Abstract: We present a study of the influence of atomic order on the relative stability of the bcc and the 18R martensitic structures in a Cu2.96Al0.92Be0.12 crystal. Calorimetric measurements have shown that disorder increases the stability of the 18R phase, contrary to what happens in Cu-Zn-Al alloys for which it is the bcc phase that is stabilized by disordering the system. This different behavior has been explained in terms of a model recently reported. We have also proved that the entropy change at the martensitic transition is independent of the state of atomic order of the crystal, as predicted theoretically. Our results suggest that differences in the vibrational spectrum of the crystal due to different states of atomic order must be equal in the bcc and in the close-packed phases.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1993, vol. 48, núm. 5, p. 3540-3543.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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