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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(英文),2018,47(1):214~218.[Huang Xiaoqian,Xu Hui,Tan Xiaohua,Wang Tonghui,Zhang Qing and 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.]
Study of Crystallization and Magnetic Properties in Fe72-xNd7B21Nbx(x=0~4.0)Bulk Alloys
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Received:November 04, 2015  Revised:January 02, 2016
DOI:
Key words: Fe-based bulk amorphous alloys  permanent magnets  crystallization  remanence
Foundation item: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)
Author NameAffiliation
Huang Xiaoqian,Xu Hui,Tan Xiaohua,Wang Tonghui,Zhang Qing and Hou Xueling  
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Abstract:
      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.