Structure and magnetic properties of Si-rich FeAlSiBNbCu alloys

Structure and magnetic properties of Si-rich FeAlSiBNbCu alloys
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富硅FeAlSiBNbCu合金的结构与磁性能

DOI:
10.1016/j.jnoncrysol.2014.12.035
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发表时间:
2015-03
影响因子:
3.5
通讯作者:
Yan-chao Xu
Yan-chao Xu
中科院分区:
材料科学2区
文献类型:
--
作者:
Li-xia Wen;Zhi Wang;Ying Han;Yan-chao Xu

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研究了淬火态Fe73.5 −xAlxSi17.5B5Cu1Nb3(x= 0,0.2,0.4,0.6,0.8,1.0)合金在不同温度下退火后的结构和磁性能。从XRD图谱上分析了其结构。磁性能主要通过磁导率Hc、饱和磁感应强度Bs、初始磁导率μi、最大磁导率μ max以及初始磁导率的温度依赖性(μi-T曲线)进行研究。结果表明,在550 °C退火30 min后,合金形成了由α-Fe(Al,Si)和Fe 3(Al,Si)晶相组成的超细晶组织,Fe72.7Al 0.8Si 17.5B5Cu1Nb3合金具有优异的室温软磁性能,其矫顽力极低,约为1 A/m,矫顽力高达1.13 T,高μ i为35,000,高μ max为128,000。在650 °C退火后,Fe72.7Al0.8Si17.5B5Cu1Nb3合金表现出优异的高温软磁性能,在10 kHz下μ i大于2800,可保持到500 °C。
Structure and magnetic properties of as-quenched Fe73.5 −xAlxSi17.5B5Cu1Nb3(x= 0, 0.2, 0.4, 0.6, 0.8, 1.0) alloys annealed at different temperatures were investigated. Structure has been analyzed from XRD patterns. Magnetic properties were mainly studied by the coercivityHc, saturation magnetic inductionBs, initial permeabilityμi, maximum permeabilityμmaxas well as the temperature dependence of initial permeability (μi–T curves). The results showed that when annealing at 550 °C for 30 min, the alloy gave rise to an ultrafine structure composed of α-Fe(Al,Si) and Fe3(Al,Si) crystalline phase embedded in the residual amorphous matrix, and the Fe72.7Al0.8Si17.5B5Cu1Nb3alloy exhibited excellent room-temperature soft magnetic properties with a very lowHcof about 1 A/m, a highBsof 1.13 T, a highμiof 35,000 and a highμmaxof 128,000 respectively. After annealing at 650 °C, Fe72.7Al0.8Si17.5B5Cu1Nb3alloy exhibited excellent high temperature soft magnetic properties, theμiabove 2800 at 10 kHz can keep up to 500 °C.
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