| In this study, processing conditions which are possible to obtain Fe_(80)B_(l2)Si_8 amorphous alloy ribbons of good quality were investigated. And also, the effects of theme conditions on the physical and magnetic properties of Fe_(80)B_(l2)Si_8 amorphous ribbons were studied. The optimum processing conditions of Fe_(80)B_(l2)Si_8 amorphous alloy ribbons were the melt temperature of 1230-1380℃ and the roll rotating speed of 2000-4000 rpm. Ribbon thickness and the air pocket size, which is ribbon surface defect, decreased with increasing of the roll rotating speed. The coersive force (H_c) varied with the roll rotating speed and melt temperature. That is, H_c decreased with increasing of the roll rotating speed and increased with increasing of melt temperature. It may be presumed that the reduction of H_c with increasing of the roll rotating speed is attributed to pinning phenomena due to the interaction between domain wall and stress around surface air pockets of ribbons. |
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