Fe69Co8Nb7-xVxB15Cu1非晶条带热稳定性与软磁性能研究

Thermal Stability and Soft Magnetic Property of Fe69Co8Nb7-xVxB15Cu1 Amorphous Alloy Ribbons

摘要:

基于Slater-Pauling曲线，运用“元素替代”成分设计法则，通过单辊旋淬工艺成功制备出Fe69Co8Nb7-xVxB15Cu1 (x=0, 2, 5, 7)非晶合金条带。利用XRD、TEM和DSC对合金系的非晶形成能力、热稳定性进行研究，并通过PPMS和B-H磁滞回线仪研究合金系的软磁性能。结果表明：随着V含量的增加，合金系的非晶形成能力、热稳定性和矫顽力逐渐降低，而饱和磁感应强度、居里温度逐渐增高；当x=2时非晶合金具有最宽两次晶化温度区间，热处理温区宽达225.9 ℃；当x=7时非晶合金具有最佳高温软磁性能，其饱和磁感应强度为0.96 T，矫顽力仅为8.95 A/m，而居里温度高达TC=349.42 ℃。

Abstract:

Applying a composition design method of “element substitution” and based on the Slater-Pauling curve, multi-component amorphous alloy ribbons with compositions of Fe69Co8Nb7-xVxB15Cu1 (x=0, 2, 5, 7, at%) were prepared by a single roller melt-spinning method. The glass forming ability, thermal stability and soft magnetic property were investigated by XRD, TEM, DSC, PPMS and B-H loop tracer. The results show that increasing V content can reduce glass forming ability, thermal stability and coercivity, but increase saturation magnetic flux density and Curie temperature of amorphous phase. The widest heat treatment temperature range of 225.9 oC appears in these amorphous alloys with V content of x=2. The desirable soft magnetic property is obtained when x=7, with saturation magnetic flux density of 0.96 T, coercivity of only 8.95 A/m, and Curie temperature up to 349.42 oC.