材料期刊网

The microstructure and magnetoelasticity of melt-spun Sm1-xPrxFe2 and Sm0.9Pr0.1(Fe1-yBy)(2) alloys have been investigated using X-ray diffraction, transmission electron microscopy, three-terminal capacitance and standard strain gauge techniques. The microstructure of melt-spun Sm1-xPrxFe2 and Sm0.9Pr0.1(Fe1-yBy)(2) is a mixture of (Sm,Pr)Fe-2/(Sm,Pr)(Fe,B)(2) crystalline and amorphous phases. The amount of amorphous phase with increasing Pr or B content. The microstructure of Sm0.9Pr0.1(Fe0.8B0.2)(2) is almost entirely amorphous phase. The magnetostriction of melt-spun Sm1-xPrxFe2 remains almost unchanged when x < 0.1 but decreases with increasing x when x > 0.1. The magnetostriction of Sm0.9Pr0.1(Fe1-yBy)(2) decreases with increasing y in high magnetic fields, but increases with increasing y in low fields (H < 400 kA/m) due to the existence of the amorphous phase.