Near zero magnetostriction of Fe-Ti alloys

Autor(es)

Bormio-Nunes, C. ^[1] ; Belarmino, A. R. ^[1] ; Santos, C. T. ^[1] ; Ugeda, V. C. ^[1] ; Baldan, C. A. ^[1] ; Ghivelder, L. ^[2]

Afiliação do(s) autor(es)

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

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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 42, n. 16 AUG 21 2009.
• Citações Web of Science: 2

Resumo

Fe(100-x)Ti(x) alloys (x = 10, 15, 20) were studied with respect to their microstructure and magnetostriction. Depending on heat treatment temperature and composition, the sample retained either the alpha-phase (A2 structure) or the alpha-phase plus the TiFe(2) Laves phase (C14 structure). The saturation magnetostriction measured at 238K is negative, about -11 ppm. However, for fields up to 0.4 T the magnetostriction is barely zero, a very interesting result. High values of magnetostriction are of interest for applications mainly in sensors and actuators, but zero magnetostriction is also a remarkable property, desirable for many applications such as electric transformers and fluxgate sensor cores. Therefore, the Fe(100-x)Ti(x) (x < 20 at%) are an attractive option to be considered for these applications. (AU)

• Processo FAPESP: 04/09779-1 - Obtenção de ligas Fe1-xGex e caracterização de suas propriedades microestruturais e magnetostrictivas
• Beneficiário: Cristina Bormio Nunes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 05/00148-1 - Obtenção e caracterização microestrutural de ligas Fe(100-x)Ti(x) (x = 5, 10, 15 e 20) objetivando exploração de propriedades magnetostrictivas
• Beneficiário: Alex Reis Belarmino
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica