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고특성 Nd₁₂Fe80B6(Nb, M) (M=Ti / Cu / Ga)급속응고리본의 자기특성
김윤배(Y. B. Kim),김창석(C. S. Kim),김동환(D. H. Kim),이갑호(K. H. Lee),김택기(T. K. Kim) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.1
Magnetic properties and microstructures of Nd₁₂Fe_(80)B_6(Nb, M) (M=Ti/Cu/Ga) melt-spun ribbons prepared by single wheel technique have been studied. The results of microstructural study have shown that Ga is effective for the orientation of c-axis normal to the ribbon plane. The Ga-added melt-spun ribbon, Nd₁₂Fe_(80)B_6(Nb, Ga), quenched at Vs=17.9 ㎧ was mostly composed of fine grains of about 30 ㎚ in size with the textured free-side surface. The powder of this ribbon aligned in magnetic field showd a high remanence of 0.87 T which was about 5% higher than that of ribbon itself. It is believed that there is a possibility to fabricate a new type of HIREM melt-spun ribbon with highly textured free-side surface.