The Microstructure And Coercivity of Sm （Co Cu Fe Zr）<sub>7.4</sub> Magnet With High Intinsic Coercivity

Xiao Yaofu; Zhang Zhengyi

doi:10.13374/j.issn1001-053x.1985.01.016

Volume 7 Issue 1

Oct. 2021

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Xiao Yaofu, Zhang Zhengyi. The Microstructure And Coercivity of Sm （Co Cu Fe Zr）7.4 Magnet With High Intinsic Coercivity[J]. Chinese Journal of Engineering, 1985, 7(1): 27-34. doi: 10.13374/j.issn1001-053x.1985.01.016

Citation:

Xiao Yaofu, Zhang Zhengyi. The Microstructure And Coercivity of Sm （Co Cu Fe Zr）_7.4 Magnet With High Intinsic Coercivity[J]. Chinese Journal of Engineering, 1985, 7(1): 27-34. doi: 10.13374/j.issn1001-053x.1985.01.016

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The Microstructure And Coercivity of Sm （Co Cu Fe Zr）_7.4 Magnet With High Intinsic Coercivity

doi: 10.13374/j.issn1001-053x.1985.01.016

Available Online: 2021-10-29

Abstract

Abstract

High ₁Hc (>30KOe) has been obtained in Sm (Co Cu Fe Zr)_7.4 magnet after aging at 850 ℃ for a long period of time. Coercivity, initial magnetization curves, magnetic domain patterns, microstructures and microstres of the diffrent aging time at 850 ℃ are Studied using magnetic measurement, Kell technical and transmisson electron microscopy. The action of "Z" phase, zonal structure and grain boundary precipitates on domain walls are discussed and a machanism of heterogeneous pinning at the high coercivity is suggested.