Effects of Heat Treatment on Magnetostrictive Properties and Microstructure of Tb-Dy-Fe Alloy with 〈110〉 Crystal Orientation

摘要

The effects of heat treatment on the magnetostrictive properties and microstructure of Tb-Dy-Fe alloy with (110) crystal orientation was studied. The composition of alloy was Tb0.3Dy0.7(Fe1-xMx)1.95(M =Mn, Al, Ti, B, x = 0.03). It is found that the magnetostrictive strains λ and dλ/dH are improved markedly; the crystal morphologies are changed from parallei planes to polygons; furthermore, rare earth rich phases disperse along the grain boundaries and sample surface, a part of it in the grains;