Structure and magnetic properties of melt-spun Fe–Pt–B alloys with high B concentrations
Structure and magnetic properties of melt-spun Fe–Pt–B alloys with high B concentrations
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高B浓度熔纺Fe-Pt-B合金的结构与磁性能
DOI：
10.1016/j.jallcom.2013.12.005
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发表时间：
2014-12
影响因子：
6.2
通讯作者：
Dongliang Peng
中科院分区：
文献类型：
--
作者：
Yanhui Li;Kunio Yubuta;Xiaoyu Liang;Dongliang Peng
研究了快凝Fe70−xPtxB30(x=0-20)合金的相演变、热稳定性、结构和磁性能。在Fe70B30合金中加入少量的铂，提高了非晶态形成能力，在x=0.5和10的合金中形成了非晶相。进一步增加铂含量，形成了fcc-FePT+Fe2B或fcc-FePT+L10-FePT+Fe2B晶相。合金经适当的退火处理后，形成了由硬质L10-FePT和软质Fe2B磁相组成的均匀的纳米结构，具有良好的硬磁性能。随着铂含量的增加，L10-FePT/Fe2B纳米复合合金的矫顽力(IHC)显著增大，剩磁(BR)减小。合金的BR为0.81-1.20kJ/m，还原剩磁为0.76-0.84kA/m，IHc为173.2-523.1 kA/m，能量积(BH)为64.088.3kJ/m~3。
The phase evolution, thermal stability, structure and magnetic properties of the melt-spun Fe70−xPtxB30(x= 0–20) alloys have been investigated. Addition of small amounts of Pt to the Fe70B30alloy increases the amorphous-forming ability, leading to the formation of an amorphous phase in the alloys withx= 5 and 10. Further increase in Pt content results in the formation of the fcc-FePt + Fe2B or fcc-FePt +L10-FePt + Fe2B crystalline phases. After appropriate annealing, the homogeneous nano-sized structure consisting of hardL10-FePt and soft Fe2B magnetic phases were formed for the alloys withx= 10–20, which exhibited good hard magnetic properties. As the Pt content increase, the coercivity (iHc) of theL10-FePt/Fe2B nanocomposite alloys significantly increased, while the remanence (Br) decreased. TheBr, reduced remanence (Mr/Ms),iHc, and energy product (BH)maxof the alloys are in the range of 0.81–1.20 T, 0.76–0.84, 173.2–523.1 kA/m, and 64.0–88.3 kJ/m3, respectively.
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