Role of Si Addition on the Crystallization Behavior, Thermal Stability, and Magnetic Properties of the FeNiMoBSi Alloys

作者：Wang, Yongfei; Xu, Jia; Liu, Yanjie^*; Liu, Zhongwu^*

来源：Journal of Superconductivity and Novel Magnetism, 2022, 35(2): 595-601.

DOI：10.1007/s10948-021-05940-9

• Fe-based amorphous alloys
• Thermal stability
• Crystallization behavior
• Saturation magnetization
• Coercivity

Effects of Si addition on the amorphous forming ability, thermal stability, and soft magnetic properties of the Fe40Ni38Mo4B18-xSix (x = 0, 2, 4, 6, 8, 10, and 12) alloys were investigated. It is found that the partial substitution of Si for B suppresses the crystallization and promotes the formation of amorphous structure. The primary crystallization temperature (T-x1), the secondary crystallization temperature (T-x2), and the temperature difference ( increment T) between primary and secondary crystallization increases with the increase of Si content (<= 4 at. %), which effectively improves the amorphous forming ability and the thermal stability of the residual amorphous matrix. For the melt-spun state, the Fe40Ni38Mo4B14Si4 amorphous alloy exhibits a low Hc of 5.8 A/m and a high Ms of 86.5 emu/g. After optimum annealing treatments at 618 K for 10 min, the Fe40Ni38Mo4B14Si4 nanocrystalline ribbon shows higher Ms of 103.2 emu/g and low Hc of 7.0 A/m.