Texture analysis of ultra-high coercivity Sm2Co7 hot deformation magnets

doi:10.1088/1674-1056/abe2fc

Abstract Bulk anisotropic Sm₂Co₇ nanocrystalline magnets were successfully prepared by hot deformation process using spark plasma sintering technology. The coercivity of the isotropic Sm₂Co₇ nanocrystalline magnet is 34.76 kOe, further, the ultra-high coercivity of 50.68 kOe is obtained in the anisotropic hot deformed Sm₂Co₇ magnet when the height reduction is 70%, which is much higher than those of the ordinarily produced hot deformed Sm₂Co₇ magnet. X-ray diffraction (XRD) analysis shows that all the samples are Sm₂Co₇ single phase. The investigation by electron backscatter diffraction indicates that increasing the amount of deformation is beneficial to the improvement of the (00l) texture of Sm₂Co₇ magnets. The Sm₂Co₇ nanocrystalline magnet generates a strong c-axis crystallographic texture during large deformation process.

Keywords: Sm₂Co₇ magnet spark plasma sintering hot deformation ultra-high coercivity texture

Received: 15 December 2020
Revised: 20 January 2021
Accepted manuscript online: 04 February 2021

PACS:	75.47.Np	(Metals and alloys)
	75.50.Ww	(Permanent magnets)
	75.60.Jk	(Magnetization reversal mechanisms)

Fund: Project supports by the Science Center of the National Natural Science Foundation of China (Grant No. 52088101), the National Natural Foundation of China (Grant No. 51590880), the Fujian Institute of Innovation, Chinese Academy of Sciences (Grant No. FJCXY18040302), the Key Program of the Chinese Academy of Sciences (Grant No. KJZD-EW-M05-1), and the Natural Science Foundation of Inner Mongolia, China (Grant Nos. 2018LH05006 and 2018LH05011).

Corresponding Authors: ^†Corresponding author. E-mail: shenbg@iphy.ac.cn

Cite this article:

Qiang Ma(马强), Meishuang Jia(贾美爽), Zhifeng Hu(胡智峰), Ming Yue(岳明), Yanli Liu(刘艳丽), Tongyun Zhao(赵同云), and Baogen Shen(沈保根) Texture analysis of ultra-high coercivity Sm₂Co₇ hot deformation magnets 2021 Chin. Phys. B 30 047505

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Texture analysis of ultra-high coercivity Sm₂Co₇ hot deformation magnets