Title :
Magnetostrictive properties of Tb0.3Dy0.7(Fe 1-xVx)2 alloys
Author :
Chin, T.S. ; Chen, F.M. ; Fang, J.S.
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
9/1/1997 12:00:00 AM
Abstract :
Various amounts of vanadium were added into the polycrystalline Terfenol-D alloy, Tb0.3Dy0.7Fe2, to investigate its effect on microstructure, hardness and magnetostrictive properties. The studied Tb0.3Dy0.7(Fe1-xVx)2 alloys were prepared by arc-melting and homogenization. V was found to enter and replace Fe sublattices up to x=0.2. With increasing V content, saturation magnetization and magnetostriction at 2 Tesla (λ2T) decrease slightly up to x=0.1 and enormously at x=0.2, while remanence and coercivity increase. Hardness of the x=0.05 alloy (3.33at% V) is the highest among the alloys studied. The λ 2T value can be maintained at higher than 900 ppm for alloys with x⩽0.1 (6.67 at% V). Porosity is high for the x⩾0.1 alloys
Keywords :
Curie temperature; X-ray diffraction; coercive force; crystal microstructure; dysprosium alloys; ferromagnetic materials; hardness; iron alloys; magnetic anisotropy; magnetisation; magnetostriction; remanence; terbium alloys; vanadium alloys; 2 T; Fe sublattices; Tb0.3Dy0.7(Fe1-xVx) 2 alloys; Tb0.3Dy0.7(FeV)2; Tb0.3Dy0.7Fe2; X-ray diffraction patterns; arc-melting; coercivity; hardness; homogenization; magnetostrictive properties; microstructure; polycrystalline Terfenol-D alloy; porosity; remanence; saturation magnetization; Iron alloys; Lattices; Magnetic properties; Magnetostriction; Optical polarization; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
