The Sm-Fe-V based 1:12 bulk magnets
The Sm-Fe-V based 1:12 bulk magnets
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Sm-Fe-V 基 1:12 大块磁体
DOI：
10.1016/j.jallcom.2019.03.249
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发表时间：
2019
影响因子：
6.2
通讯作者：
G. Hadjipanayis
中科院分区：
文献类型：
--
作者：
A. M. Schönhöbel;R. Madugundo;A. Gabay;J. Barandiaran;G. Hadjipanayis
采用热压法制备了具有thmn12晶体结构的Sm-Fe-V块状磁体，其密度为理论密度的92%。各向同性磁体的最大矫顽力为1.06 T，磁化强度为0.59 T，剩余磁化强度为0.42 T, (BH)max为28 kJ m−3at 3 T。居里温度为330 ℃，剩余磁化强度和矫顽力的温度系数分别为0.14%和0.39% C−1。微磁滞回表明其矫顽力机制与纳米晶钕铁硼磁体相似。各向同性磁铁是hot-deformed高达75%的高度,获得最好的磁性是μ0 m3t = 0.63 T,μ0 = 0.45 T先生,μ0 hc = 0.88 T和(BH) max = 33 kJ m−3。随着钒用量的减少，变形温度从800℃提高到1000 ℃，在垂直于压实方向的方向上出现了细小的织构。
A bulk magnet based on Sm-Fe-V with the ThMn12crystal structure has been fabricated for the first time by hot-compaction of mechanically milled powders with a density of 92% of the theoretical density. The isotropic magnet exhibits a maximum coercivity of 1.06 T with a magnetization of 0.59 T, a remanent magnetization of 0.42 T and a (BH)maxof 28 kJ m−3at 3 T applied field. The Curie temperature is found to be 330 °C and the temperature coefficients of remanent magnetization and coercivity are 0.14% C−1and 0.39% C−1, respectively. Minor hysteresis loops indicate a coercivity mechanism similar to that of the nanocrystalline Nd-Fe-B magnets. The isotropic magnet was hot-deformed up to 75% of its height, and the best magnetic properties obtained were μ0M3T= 0.63 T, μ0Mr= 0.45 T, μ0Hc= 0.88 T and (BH)max= 33 kJ m−3. A small texture perpendicular to compaction direction was detected when the amount of vanadium was reduced, and the deformation temperature was increased from 800 to 1000 °C.