Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/9885
Title: Entropy change of martensitic transformations in Cu-based shape-memory alloys
Author: Mañosa, Lluís
Planes Vila, Antoni
Ortín, Jordi, 1959-
Martínez Benjamin, Joan Josep
Keywords: Diagrames de fase
Transformacions de fase (Física estadística)
Termodinàmica
Phase diagrams
Phase transformations (Statistical physics)
Thermodynamics
Issue Date: 1993
Publisher: The American Physical Society
Abstract: We have investigated the different contributions to the entropy change at the martensitic transition of different families of Cu-based shape-memory alloys. The total entropy change has been obtained through calorimetric measurements. By measuring the evolution of the magnetic susceptibility with temperature, the entropy change associated with conduction electrons has been evaluated. The contribution of the anharmonic vibrations of the lattice has also been estimated using various parameters associated with the anharmonic behavior of these alloys, collected from the literature. The results found in the present work have been compared to values published for the martensitic transition of group-IV metals. For Cu-based alloys, both electron and anharmonic contributions have been shown to be much smaller than the overall entropy change. This finding demonstrates that the harmonic vibrations of the lattice are the most relevant contribution to the stability of the bcc phase in Cu-based alloys.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.3611
It is part of: Physical Review B, 1993, vol. 48, núm. 6, p. 3611-3619.
URI: http://hdl.handle.net/2445/9885
ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
82266.pdf1.22 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.