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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(英文),2019,48(5):1567~1572.[Zhang Tianli,Wang Wenlong,Xu Cheng,Wang Hui,Zhang Wei,Zhang Zhihong and 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.]
Mechanism research of z Value Affecting Magnetic Properties of Sm(CoFeCuZr)z
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Received:November 23, 2017  Revised:December 22, 2017
DOI:
Key words: Sm(CoFeCuZr)z  z value  magnetic property  microstructure  distribution of Cu element
Foundation item: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)
Author NameAffiliation
Zhang Tianli,Wang Wenlong,Xu Cheng,Wang Hui,Zhang Wei,Zhang Zhihong and Jiang Chengbao  
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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.