발간논문

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Vol.32, No.8, 999 ~ 1006, 1994
Title
The Crystallization Behavior and Magnetic Properties of Fe - B - Nb Amorphous Alloys
이종선Joong Seon Lee, 김광윤Kwang Youn Kim, 노태환Tae Hwan Noh, 강일구Il Koo Kang, 유연철Yeon Chul Yoo
Abstract
The microstructure and magnetic properties were investigated on the crystallization of amorphous Fe_(100-x-y)B_xNb_y (5≤x≤10, 5≤x≤9) alloy ribbons, which were produced by using a single-roll melt-spinning technique. The best magnetic properties were obtained for the alloy Fe_(84)B_9Nb_7 and the magnetic properties achieved are; the effective permeability of 12,000 at 1 ㎑, do coercive force of 10 A/m and the core loss of 90 W/㎏ measured at 100 ㎑, 0.2 T. These good magnetic properties were attributed to the formation of bcc-Fe crystalline phase with about l0㎚ grain diameter. The magnetic properties were reduced abruptly as the constitution deviates from the optimum composition. The rapid deterioration of the magnetic properties are due to the formation of Fe₃B for Fe_(93-x)B_xNb_7 (B≥10 at%) alloys and Fe₂Nb for Fe_(91-x)B_9Nb_y (Nb≥8 at%) ones.
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