Investigation of glass forming ability, thermal stability and soft magnetic properties of melt-spun Fe_(83)P_(16-x)Si_xCu_1 (x = 0,1, 2, 3, 4, 5) alloy ribbons

摘要

The Si content dependences of glass forming ability (GFA), thermal stability and soft magnetic properties of melt-spun Fe_(83)P_(16-x)Si_xCu_1 (x = 0, 1,2, 3, 4, 5) ribbons were investigated. The substitution of P by Si decreases the GFA of this alloy system. Thermal stability of melt-spun ribbons increases and temperature interval between the first and second crystallization peaks enlarges with the increase of Si content. Amorphous ribbons Fe_(83)P_(16-x)Si_xCu_1 (x = 0,1,2,3) were annealed at different temperatures ranging from 563 K to 653 K. The addition of Si enlarges the optimum annealing range and decreases the sensitivity of coer-tivity on annealing temperature, which improves the controllability of annealing process effectively. After optimum annealing the coercivity of nanocrystalline soft magnetic alloy Fe_(83)P_(13)Si_3Cu_1 is 7.3 A/m, which is lower than that of its Si-free counterpart Fe_(83)P_(16)Cu_1. And its magnetic flux density shows slight decrease due to the formation of α-Fe(Si) solid solution.