铝镍钴永磁材料的研究进展

doi:10.11896/cldb.23080088

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Abstract Alnico permanent magnetic materials play an important role in precision instruments for aerospace applications due to their high remanence and excellent temperature stability. As a representative of rare-earth-free permanent magnets, Alnicomaterials have once again become one of the international research hotspots in the field of permanent magnet materials with the rare-earth resource crisis. However, the actual nanostructure and magnetization reversal of Alnico materials are different from the magnetic moment consistent rotation model. As a result, the coercivity of Alnico is much lower than the theoretical limit. It hinders the performance enhancement and application development of the Alnico materials. In recent years, the microstructures of Alnico magnets have been explored by advanced characterizations, and the influence mechanism of magnetic properties has been established by combining the micromagnetic simulation with the experimental results. It is favorable to the structural design, performance enhancement, and application breakthrough of Alnico materials. In this work, the research progress of Alnico materials in microstructure characterization and magnetic mechanism is introduced, the improvement of coercivity and temperature stability is overviewed, and the exploration of new preparation technology is summarized. Finally, the unresolved problems in the research of Alnico permanent magnetic materials and the future research development direction are prospected.

Key words： alnico permanent magnetic materials spinodal decomposition coercivity temperature stability

Published: 10 December 2024 Online: 2024-12-10

CLC number:

TM273

Fund:National Key R&D Program of China (2022YFB3807900).

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	Articles by authors
	LIU Yueqing
	ZHAO Jiangtao
	WANG Fengqing
	LIU Lei
	DING Yong
	SUN Yingli
	YAN Aru

Cite this article:

LIU Yueqing,ZHAO Jiangtao,WANG Fengqing, et al. Research Progress in Alnico Permanent Magnetic Materials[J]. Materials Reports, 2024, 38(23): 23080088-10.

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http://www.mater-rep.com/EN/10.11896/cldb.23080088 OR http://www.mater-rep.com/EN/Y2024/V38/I23/23080088

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