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.)

Magnetostriction of the polycrystalline Fe80Al20 alloy doped with boron

Full text
Author(s):
Bormio-Nunes, Cristina [1] ; dos Santos, Claudio Teodoro [1] ; de Souza Dias, Mateus Botani [1] ; Doerr, Mathias [2] ; Granovsky, Sergey [2] ; Loewenhaupt, Michael [2]
Total Authors: 6
Affiliation:
[1] Univ S Paulo, Dep Eng Mat, Escola Engn Lorena, Lorena, SP - Brazil
[2] Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden - Germany
Total Affiliations: 2
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 539, p. 226-232, OCT 25 2012.
Web of Science Citations: 17
Abstract

The doping of Fe80Al20 polycrystalline alloy with 2% of boron increased the total magnetostriction twofold compared to a sample without boron. A value close to 80 ppm was achieved at 300 K. The microstructures of the boron-doped alloys show a dendritically solidified matrix with interdendritic alpha-FeAl and/or Fe3Al and Fe2B eutectic between the grains. The XRD analysis reveals an increase in the volume fraction of alpha-FeAl and a correspondent decrease of the Fe3Al phase volume fraction as the boron content increases. The increase of the volume fraction of this tetragonal Fe2B phase in the samples doped with boron causes the decrease of the strong volume magnetostriction that was observed in the alloy without boron. There is some evidence that the improvement of the magnetostriction magnitude due to the addition of boron to the Fe80Al20 alloy could reach the maximal magnetostriction if the 1:1 optimal ratio of the volume fractions of the alpha-FeAl and Fe3Al phases could be reached. (c) 2012 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry
Grantee:Carlos Alberto Moreira dos Santos
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 08/07463-8 - Study of magnetostrictive properties of Fe-M (M = Al, Ga) alloys doped with boron
Grantee:Cristina Bormio Nunes
Support Opportunities: Regular Research Grants