黄晓倩,徐晖,谭晓华,王同辉,张晴,侯雪玲.Fe72-xNd7B21Nbx(x=0~4.0)块体合金晶化过程和磁性能的研究[J].稀有金属材料与工程,2018,47(1):214~218.[Huang Xiaoqian,Xu Hui,Tan Xiaohua,Wang Tonghui,Zhang Qing,Hou Xueling.Study of Crystallization and Magnetic Properties in Fe72-xNd7B21Nbx(x=0~4.0)Bulk Alloys[J].Rare Metal Materials and Engineering,2018,47(1):214~218.]
Fe72-xNd7B21Nbx(x=0~4.0)块体合金晶化过程和磁性能的研究
投稿时间:2015-11-04  修订日期:2016-01-02
中文关键词:  Fe基大块非晶合金  永磁体  晶化  剩磁
基金项目:国家自然科学基金资助(项目号51171101,51471101),国家973项目资助(项目号 2015CB856800)
中文摘要:
      采用铜模吸铸法制备了直径d为2 mm的Fe72-xNd7B21Nbx(x=0~4.0)块体合金,利用X射线衍射仪(XRD)、差示扫描量热仪(DSC)、振动样品磁强计(VSM)和多功能物理性质测量系统(PPMS)研究了Nb含量对该体系合金非晶形成能力、晶化行为及磁性能的影响。结果表明:适当的添加Nb有助于提高该体系合金的非晶形成能力,当Nb含量为2.0 at%、2.2 at%和2.5 at%时,可以获得基本为非晶结构的块体合金。Nb含量对该体系合金的晶化行为有着重要影响,Nb含量为2.5 at%的合金在晶化过程中能有效抑制非磁性相的析出,增强了晶粒间的交换耦合作用,使得其剩磁得到明显的提高,具有最佳的综合磁性能:Br=0.63 T,Hci =448.97 kA/m,(BH)max=4.54 MGOe。
Study of Crystallization and Magnetic Properties in Fe72-xNd7B21Nbx(x=0~4.0)Bulk Alloys
英文关键词:Fe-based bulk amorphous alloys  permanent magnets  crystallization  remanence
英文摘要:
      Fe72-xNd7B21Nbx(x=0~4.0)bulk alloys with diameter of 2 mm were fabricated by copper mold casting. The influence of Nb addition on the glass forming ability, crystallization and magnetic properties have been investigated by X-ray diffraction (XRD), differential scanning calorimetry (DSC), vibrating sample magnetometer (VSM) and physical property measurement system (PPMS). The results show that appropriate addition of Nb can improve the glass forming ability. The fully amorphous ingots are obtained when Nb content is 2.0 at%, 2.2 at% and 2.5 at%. Nb is found to be effective in adjusting the alloy composition and decreasing the volume fraction of paramagnetic Nd1.1Fe4B4 phase . When Nb content is 2.5 at%, the alloy exhibits optimal hard magnetic properties with the remanence (Br) of 0.63 T, intrinsic coercicity (Hci) of 448.97 kA/m and maximum energy product ((BH)max) of 4.54 MGOe. The enhanced magnetic properties can be abscribed to the strong exchange coupling among grains and and high remanence.
作者单位E-mail
黄晓倩 上海大学 shawtsain@126.com 
徐晖 上海大学 huixu8888@shu.edu.cn 
谭晓华 上海大学 tanxiaohua123@163.com 
王同辉 上海工程技术大学 wangtonghui66@126.com 
张晴 上海大学 1015040524@qq.com 
侯雪玲 上海大学 grasshuang10@163.com 
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