High magnetostriction of the polycrystalline alloy (Fe0.8Al0.2)(97)B-3

Autor(es)

Bormio-Nunes, Cristina ^[1] ; Dias, Mateus Botani ^[1] ; Ghivelder, Luis ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 574, p. 467-471, OCT 15 2013.
• Citações Web of Science: 11

Resumo

In the present work we investigate the alloys (Fe0.8Al0.2)(100) B-x(x), for x > 2.0 up to x = 5.0. A maximum of the total magnetostriction was found for the alloy (Fe0.80Al0.20)(97)B-3. In this sample we measured the boron contents using WDS and we did not find boron in the matrix, while the precipitates formed after annealing of as cast samples are essentially the phase Fe2B. By a detailed XRD study of this sample using Mo K alpha radiation, the presence of the phases Fe3Al (D03) and alpha (A2) was determined. The coexistence of both phases was determined to be the origin of the increase of the magnetostriction of this material. The value of lambda(long) = 80 x 10 (6) achieved in the as cast sample with x = 3 indicates that the introduction of texturing to the material should provide even higher enhancement of the magnetostriction. In addition to high magnetostriction values, the alloy can be machined, welded and is also a low cost material, therefore the alloy (Fe0.80Al0.20)(97)B-3 reveals a great promise as a material to be used on sensors and actuators assembly. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 08/07463-8 - Estudo de propriedades magnetostrictivas de ligas Fe-M (M = Ga, Al) dopadas com boro
• Beneficiário: Cristina Bormio Nunes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/21258-0 - Construção de um sensor de força usando a liga Fe-Ga e a liga Fe-Al dopada com boro
• Beneficiário: Cristina Bormio Nunes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/10699-3 - Estudo de propriedades magnetostrictivas de liga de Fe80A20 dopada com boro.
• Beneficiário: Mateus Botani de Souza Dias
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica