Near-equilibrium and non-equilibrium specimens with the nominal composition of(LaxCe1-x)3.0Fe14B(x=0,0.05,0.10,0.15,0.20,0.25,0.30,0.35)alloy were prepared by annealing and rapid quenching,respectively.The effect of La content on the content of CeFe2 phase and magnetic properties of the alloy was studied by means of X-ray diffraction and thermomagnetic curve analysis.The results show that the content of CeFe2 phase in the alloy decreases monotonously with the increase of La substitution,and the non-equilibrium specimen contains less CeFe2 phase than the near-equilibrium specimen with the same nominal composition,indicating the preparation process has a strong influence on the content of the CeFe2 phase.With the increase of La content,the saturation magnetization,remanence and maximum magnetic energy product of the non-equilibrium specimen are improved,the coercivity increases and then decreases,which all is the result of the decrease of magnetocrystalline anisotropy field and the optimization of microstructure.In addition,it is found that La con not enter CeFe2 phase like other rare earth metals.
high abundance rare earthpermanent magnet materialCe-Fe-B alloyphase compositionmelt-spun ribbonsCeFe2
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