Artículos de revistas
Magnetostriction of polycrystalline Fe-Ge alloys
Fecha
2009Registro en:
JOURNAL OF ALLOYS AND COMPOUNDS, v.471, n.1/Fev, p.52-55, 2009
0925-8388
10.1016/j.jallcom.2008.03.038
Autor
TURTELLI, R. Sato
NUNES, C. Bormio
TEIXEIRA, L. C.
GROESSINGER, R.
SUZUKI, P. A.
BARBATTI, C.
Institución
Resumen
The longitudinal and transverse magnetostriction and microstructure of polycrystalline Fe(100-x)Ge(x) (x= 8, 12, 15, 20) alloys were investigated in order to correlate the magnetostriction with microstructure. In order to obtain different microstructures in the Fe(100-x)Ge(x) alloys, the samples were annealed at 600 degrees C during 2 h and at 1150 degrees C for half hour and then quenched in cold water. For Ge concentrations lower than 14 at.%, the longitudinal magnetostriction is positive and increases positively up to 22 ppm at 12 at.% Ge then decreases and vanishes at about 14 at.% Ge. For further Ge concentration increase the longitudinal magnetostriction is negative and reaches -30 ppm for Fe(80)Ge(20). This behavior, that is very similar to that reported for Fe-Si alloys, is explained by the structural changes caused by different thermal histories of the alloys. (C) 2008 Published by Elsevier B. V.