Crystallization behaviour and magnetic properties of melt-spun Fe-Si-B-Nb-Cu alloys have been investigated. It is found that the primary phase changes from α α-Fe(Si) to Fe 3 Si (DO 3) on increasing the Si content. The coercivity of the alloys containing the Fe 3 Si phase is significantly lower as compared to the alloy containing α α-Fe(Si) phase. A heat treatment temperature-time-coercivity map has been obtained for optimization of the coercivity.
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