Effects of manganese substitution on magnetic and magnetostrictive properties of Tb0.5Dy0.5(Fe1-xMnx)1.92/epoxy composites with spherical single-crystal particles*

Spherical Tb0.5Dy0.5(Fe1-xMnx)1.92 (x 1/4 0, 0.05, 0.10 and 0.15) single-crystal particles were prepared. The magnetic anisotropy of the alloy decreases as x increases from 0 to 0.15. Subsequently, we prepared giant magnetostrictive composites with these spherical Tb0.5Dy0.5(Fe1-xMnx)1.92 single-crystal particles. As a consequence, well <111>-oriented Tb0.5Dy0.5(Fe1-xMnx)1.92 composites with 55 vol% Tb0.5Dy0.5(Fe1-xMnx)1.92 particles were obtained. The Tb0.5Dy0.5(Fe0.9Mn0.1)2 composite manifests a good low-field magnetostrictive property and saturation magnetostriction at an axial pressure of 10 MPa, l||, saturation z 2100 ppm, which is larger than that of the commercially available Terfenol-D (1400-1800 ppm). The preparation of composites with single crystal spherical powders may be an effective solution of developing high-performance magnetostrictive composites.& COPY; 2022 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Automated summary

Spherical Tb0.5Dy0.5(Fe1-xMnx)1.92 (x 1/4 0, 0.05, 0.10 and 0.15) single-crystal particles were prepared, and the study found that the magnetic anisotropy of the alloy decreases as x increases from 0 to 0.15. Subsequently, giant magnetostrictive composites with well <111>-oriented Tb0.5Dy0.5(Fe1-xMnx)1.92 particles were obtained, showing a better magnetostrictive property compared to commercially available Terfenol-D.