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MAGNETIC PROPERTIES OF MELT - SPUN Fe86-xAl₄B10Zrx AMORPHOUS ALLOYS

K.J. Kim, J.Y. Park, K.J. Kim, J.S. Lee, Tae Hwan Noh

Abstract

With the object of developing a new magnetic core materials for high frequency use, the crystallization behaviors and the soft magnetic properties of amorphous Fe_(86-x)Al₄B_(10)Zr_x (5≤x≤10 at%) alloys subjected to annealing treatment at wide temperature range were investigated. For optimally annealed Fe_(86-x)Al₄B_(10)Zr_x alloys in amorphous state, rather good soft magnetic properties of μe=17000~25000, Hc=20~30 mOe and B_(10)≥0.6 T are obtained. However, as the alloys crystallize, the soft magnetic properties are largely deteriorated, which is attributed principally to the narrow temperature gap between T_(x1) and T_(x2), which allows the nearly co-precipitation of bee phase and Fe-B compounds in incipient crystallization stage.

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Key concepts: Crystallization, Materials science, Annealing (glass), Amorphous metal, Amorphous solid, Crystallography, Metallurgy, Nuclear magnetic resonance