Excellent high-temperature magnetic softness in a wide temperature for FeCo-based nanocrystalline alloy

Excellent high-temperature magnetic softness in a wide temperature for FeCo-based nanocrystalline alloy
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FeCo基纳米晶合金在宽温范围内具有优异的高温软磁性能

DOI:
10.1016/j.jnoncrysol.2015.12.014
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发表时间:
2016-02
影响因子:
3.5
通讯作者:
Wang, Zhi
Wang, Zhi
中科院分区:
材料科学2区
文献类型:
--
作者:
Han, Ying;Wang, Zhi

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研究了淬火态和退火态(Fe 1 − xCox)72.7Al0.8Si17.5B5Cu1Nb3(x = 0,0.5)合金的结构和初始磁导率(μi)。替代50 at.% Co替代Fe使非晶合金的居里温度TcA从325 °C提高到375 °C,二次晶化温度Tx 2从720 °C提高到729 °C,从而推迟了Fe-B硬磁相的形成。主要分析了(Fe 0.5Co 0.5)72.7Al 0.8Si 17.5B 5Cu 1 Nb 3合金在510-640 °C热-冷循环过程中初始磁导率与温度(μi-T曲线)的相关性。在550 ° C退火的样品具有最佳的高温软磁性能,从室温到600 °C,μ c保持在1400以上,并且与T呈近似水平线性关系,这使得该合金作为一种经济实惠的高温软磁材料具有吸引力。
Structure and initial permeability (μi) of as-quenched and annealed (Fe1 − xCox)72.7Al0.8Si17.5B5Cu1Nb3(x = 0,0.5) alloys were investigated. Substituting 50 at.% Co for Fe enhances both the Curie temperature of amorphous alloy,TcA, from 325 to 375 °C and the secondary crystallization temperatureTx2, for delaying the formation of Fe–B hard magnetic phase from 720 °C to 729 °C. The correlation between initial permeability and temperature (μi–T curve) for (Fe0.5Co0.5)72.7Al0.8Si17.5B5Cu1Nb3alloys heating–cooling cycled at 510–640 °C was mainly analyzed. The optimum high temperature magnetic softness was found in 550 °C-annealed sample, the μican maintain above 1400 and shows roughly a horizontal linear correlation with T from room temperature up to 600 °C, which make this alloy attractive as an affordable high-temperature soft magnetic material.
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