摘要
The ingots with nominal composition Pr9.5Fe84-xB6.4P0.1Zrx(x=0,1,2,3)were prepared by an electric arc furnace under purified argon atmosphere.The ribbons were obtained by melt spinning at a wheel speed of16-33 m·s-1.X-ray diffraction(XRD)results show that P addition decreases crystallinity of hard phase,but further Zr addition increases the amorphous-forming ability of soft phase.The intrinsic coercivity largely increases from 502(Zr-free)to 945 kA·m-1(2 at%Zr),which is among the highest value reported so far in this poor rare earth nanocomposite magnets.The hysteresis loops of the alloys with addition of 1 at%and 2 at%Zr show good squareness with single-phase characteristic,indicating well exchange coupling between hard and soft magnetic grains.Transmission electron microscope(TEM)results reveal small grain size and uniformity in the microstructure in the Zradded samples,which is the reason for high coercivity.
The ingots with nominal composition Pr9.5Fe84-xB6.4P0.1Zrx（x=0,1,2,3） were prepared by an electric arc furnace under purified argon atmosphere.The ribbons were obtained by melt spinning at a wheel speed of16-33 m·s-1.X-ray diffraction（XRD） results show that P addition decreases crystallinity of hard phase,but further Zr addition increases the amorphous-forming ability of soft phase.The intrinsic coercivity largely increases from 502（Zr-free） to 945 kA·m-1（2 at% Zr）,which is among the highest value reported so far in this poor rare earth nanocomposite magnets.The hysteresis loops of the alloys with addition of 1 at% and 2 at% Zr show good squareness with single-phase characteristic,indicating well exchange coupling between hard and soft magnetic grains.Transmission electron microscope（TEM） results reveal small grain size and uniformity in the microstructure in the Zradded samples,which is the reason for high coercivity.
基金
financially supported by the National Natural Science Foundation of China(Nos.11474184 and 11627805)
Shandong Province Natural Science Foundation of China(No.ZR2016EMM14).
