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z值影响Sm(CoFeCuZr)z磁性能的机理研究
作者:
作者单位:

1.北京航空航天大学材料科学与工程学院;2.包头稀土研究院 白云鄂博稀土资源研究与综合利用国家重点实验室;3.包头稀土研究院

基金项目:

国家自然科学基金资助(项目号No.51471016)和北京市自然科学基金资助(项目号No.2151002)


Mechanism research of z Value Affecting Magnetic Properties of Sm(CoFeCuZr)z
Author:
Affiliation:

1.School of Materials and Engineering,Beihang University;2.State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization;3.Baotou Research Institute of Rare Earths,Baotou

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    摘要:

    通过粉末冶金法制备了不同z值(z=7.5~8.5)的Sm(CoFeCuZr)z磁体。利用磁性能测量系统、x射线衍射分析、电子探针以及透射显微镜等对磁体的性能、组成相、析出相含量、微观结构及元素分布进行表征,通过分析解释了磁性能随z值变化的内在机理。结果表明：随z值增大,胞状结构尺寸增大,高饱和磁化强度的2:17R相增多导致剩磁Br升高；z值增大导致富Zr析出相增多,引起方形度Hk/Hcj下降；z值通过改变Cu元素在2:17R相界面位置的富集程度来改变矫顽力Hcj的大小,在一定范围内(z<8.2)该位置Cu含量越高,矫顽力越大。

    Abstract:

    The Sm (CoFeCuZr)z permanent magnets with different z values (z=7.5~8.5) were prepared by powder metallurgy. The properties, constituent phase, precipitated-phase content, microstructure and element distribution of the magnet were characterized by magnetic measurement system, X ray diffraction analysis, electron probe and transmission electron microscope. Magnetic properties change with z value, and the inherent mechanism is explained in this essay. The results show that the increase of z value leads to the increase in the size of cell structure and the 2:17R phase with high saturation magnetization, which finally results in the improvement of remanence Br. The precipitated Zr-riched phase increases with the z value increases, which has a weakening effect on the squareness Hk/Hcj. The z value changes the enrichment of Cu element at the edge of 2: 17R phase, which has a significant effect to the coercivity Hcj. Within the certain range (z <8.2), the higher the content of Cu at that edge, the larger the coercivity is.

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张天丽,王文龙,徐成,王慧,张伟,张志宏,蒋成保. z值影响Sm(CoFeCuZr)z磁性能的机理研究[J].稀有金属材料与工程,2019,48(5):1567~1572.[Zhang Tianli, Wang Wenlong, Xu Cheng, Wang Hui, Zhang Wei, Zhang Zhihong, Jiang Chengbao. Mechanism research of z Value Affecting Magnetic Properties of Sm(CoFeCuZr)z[J]. Rare Metal Materials and Engineering,2019,48(5):1567~1572.]
DOI：10.12442/j. issn.1002-185X.20171059

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  • 收稿日期:2017-11-23
  • 最后修改日期:2017-12-22
  • 录用日期:2018-01-09
  • 在线发布日期: 2019-06-04

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