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Structure of rapidly quenched Ga-free Heusler alloys

The development of magnetic shape memory alloys in ribbon form is a new field with interesting thermo-elastic and thermo-magnetic properties. In this work, two Ga-free Heusler alloys were obtained. It is found that is possible to obtain these materials with an austenite structure or with a martensite structure at room temperature. The lattice parameters are a = 0.5985(4) nm for the cubic L2 1 austenite and a = 1.2604(5) nm, b = 0.4925(2) nm and c = 0.4775(9) nm for the orthorhombic martensite. Furthermore, the microstructure followed by scanning electron microscopy confirms the coexistence of equiaxial and columnar grains with an inhomogeneous distribution. The composition of each alloy is homogeneous. The control of different parameters, as the composition and the processing conditions can be a good option in order to obtain a material with the crystalline structure and the microstructure desired at room or near room temperature. This fact, can favours the applicability of this materials

This research has been financially supported under Spanish MICINN projects Nos. MAT2009-13108-C02-01 and 02

© Physica status solidi. A, Applications and materials science, 2011, vol. 208, núm. 10, p. 2281-2283

Wiley

Author: Suñol Martínez, Joan Josep
Escoda i Acero, Ma. Lluïsa
Hernando, Blanca
Rosa, W. O.
Sánchez Fernández, Tatiana
Santos Rodríguez, Jesús Daniel
Prida, V.M.
Shavrov, V. G.
Date: 2011 October
Abstract: The development of magnetic shape memory alloys in ribbon form is a new field with interesting thermo-elastic and thermo-magnetic properties. In this work, two Ga-free Heusler alloys were obtained. It is found that is possible to obtain these materials with an austenite structure or with a martensite structure at room temperature. The lattice parameters are a = 0.5985(4) nm for the cubic L2 1 austenite and a = 1.2604(5) nm, b = 0.4925(2) nm and c = 0.4775(9) nm for the orthorhombic martensite. Furthermore, the microstructure followed by scanning electron microscopy confirms the coexistence of equiaxial and columnar grains with an inhomogeneous distribution. The composition of each alloy is homogeneous. The control of different parameters, as the composition and the processing conditions can be a good option in order to obtain a material with the crystalline structure and the microstructure desired at room or near room temperature. This fact, can favours the applicability of this materials
This research has been financially supported under Spanish MICINN projects Nos. MAT2009-13108-C02-01 and 02
Format: application/pdf
ISSN: 1862-6300 (versió paper)
1862-6319 (versió electrònica)
Document access: http://hdl.handle.net/10256/12526
Language: eng
Publisher: Wiley
Collection: MICINN/PN 2010-2013/MAT2009-13108-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1002/pssa.201000743
Articles publicats (D-F)
Is part of: © Physica status solidi. A, Applications and materials science, 2011, vol. 208, núm. 10, p. 2281-2283
Rights: Tots els drets reservats
Subject: Aliatges
Alloys
Gal·li -- Aliatges
Gallium -- Alloys
Aliatges amb memòria de forma
Shape memory alloys
Anàlisi tèrmica
Thermal analysis
Title: Structure of rapidly quenched Ga-free Heusler alloys
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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