Abstract

Soft magnetic alloy Fe81-xP9C7Si3Cux (x = 0, 0·5, 0·7, 1, 1·3) ribbons were produced by the single roller melt spinning method. The Cu content dependence of microstructure and magnetic properties was investigated. Appropriate addition of Cu is effective to the improvement of glass forming ability (GFA) and soft magnetic properties in this alloy system. The thermal stability, crystallisation process and soft magnetic properties of Fe80P9C7Si3Cu1 were also investigated. Excellent soft magnetic properties with low coercivity Hc (5·9 A m−1) and high magnetic flux density B8000 (1·68 T) can be obtained annealing this alloy at 653 K for 2 min. Low cost of raw materials and good soft magnetic properties make this alloy a promising candidate for future application.

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