발간논문

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Vol.30, No.12, 1500 ~ 1507, 1992
Title
Structural Relaxation Behaviour of Amorphous Fe - Ni - B alloys
김대승Dae Seung Kim, 박태원Tae Won Park, 이승원Seung Won Lee
Abstract
The structural relaxation process of amorphous F_(40)Ni_(40)B_(20), Fe_(60)Ni_(20)B_(20) and Fe_(38)Ni_(38)B_(24) alloys were investigated by means of DSC and Mo¨ssbauer measurements. Upon heating the samples annealed at the temperature below Tg, an excess endothermic reaction occur above Ta. The ΔC_(p.endo) evolves reversibly in a continuous manner with In(t_a). The change in the magnitude of ΔC_(p.endo) and ΔH_(endo) with Ta show clealy increased at about Ta=450∼550K. The activation energy of structural relaxation increases with Tm from 1.8eV at Tm=525K to 2.OeV at Tm=600K for Fe_(40)Ni_(40)B_(20) alloy. The first-neighbor iron atoms were changed and the average number of first-neighbor iron atoms increased during isothemal annealing with chemical short range order (CSRO).
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