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Rare Metals

, Volume 39, Issue 1, pp 62–69 | Cite as

Microstructure and magnetic properties of sintered Nd–Fe–B magnets with Ce substitution for Nd by intergranular-alloy method

  • Jian-Xin Huang
  • Ying Liu
  • Jun LiEmail author
  • Wei Zhao
  • Qi Shi
Article
  • 47 Downloads

Abstract

Aiming at the comprehensive utilization of the rare-earth resources and the preparation of the high-performance low-cost Nd–Fe–B magnets, sintered magnets with different Ce substitution amounts of 17.2 wt%, 24.8 wt% and 31.8 wt% were prepared by intergranular-alloy method. The influence of substitution of Ce for Nd on their microstructure and magnetic properties in this work was detailedly investigated. The results indicated that the remanence (Br) and the maximum energy product ((BH)max) of the sintered magnets decreased monotonically with the increase in Ce substitution. However, the obvious enhancement of coercivity (Hcj) was also observed, which was mainly due to the improvement of microstructure and the smooth, continuous grain boundary (GB). It can be found that a reasonable Ce substitution of 24.8 wt% for the sintered magnets could promote the refinement of microstructure, leading to the realization of superior magnetic properties. It is expected that the investigations could be beneficial to offer a feasible method for preparing the high-performance low-cost Ce-doped magnets.

Keywords

Microstructure Sintered magnets Ce substitution Intergranular-alloy method 

Notes

Acknowledgements

This work was financially supported by the Sichuan Province Science and Technology Support Program (No. 2014GZ0090) and the Key Technology and Development Program of PanXi Experimental Area (No. 2016KJT0018).

References

  1. [1]
    Zhao W, Liu Y, Li J, Wang RQ, Qiu YC. Microstructure and magnetic properties of hot-deformed anisotropic Nd–Fe–B magnets prepared from amorphous precursors with different crystallization proportions. Rare Met. 2017;36(4):268.CrossRefGoogle Scholar
  2. [2]
    Jones N. Materials science: the pull of stronger magnets. Nature. 2011;472(7341):22.CrossRefGoogle Scholar
  3. [3]
    Sugimoto S. Current status and recent topics of rare-earth permanent magnets. J Phys D Appl Phys. 2011;44(41):110.Google Scholar
  4. [4]
    Matsuura Y. Recent development of Nd–Fe–B sintered magnets and their applications. J Magn Magn Mater. 2006;303(2):344.CrossRefGoogle Scholar
  5. [5]
    Hussain M, Zhao LZ, Zhang C, Jiao DL, Zhong XC, Liu ZW. Composition-dependent magnetic properties of melt-spun La or/and Ce substituted nanocomposite NdFeB alloys. Physica B. 2016;483:69.CrossRefGoogle Scholar
  6. [6]
    Li Z, Liu WQ, Zha SS, Li YQ, Wang YQ, Zhang DT, Yue M, Zhang JX, Huang XL. Effects of CE substitution on the microstructures and intrinsic magnetic properties of Nd–Fe–B alloy. J Magn Magn Mater. 2015;393:551.CrossRefGoogle Scholar
  7. [7]
    Pathak AK, Khan M, Gschneidner KA Jr, McCallum RW, Zhou L, Sun KW, Dennis KW, Zhou C, Pinkerton FE, Kramer MJ, Pecharsky VK. Cerium: an unlikely replacement of dysprosium in high performance Nd–Fe–B permanent magnets. Adv Mater. 2015;27(16):2663.CrossRefGoogle Scholar
  8. [8]
    Herbst JF, Meyer MS, Pinkerton FE. Magnetic hardening of Ce2Fe14B. J Appl Phys. 2012;111(7):07A718.CrossRefGoogle Scholar
  9. [9]
    Huang S, Feng H, Zhu M, Li AH, Zhang Y, Li W. Investigation of chemical composition and crystal structure in sintered Ce15Nd15FebalB1 magnet. AIP Adv. 2014;4(10):4106.Google Scholar
  10. [10]
    Zhou QY, Liu Z, Guo S, Yan AR, Lee D. Magnetic properties and microstructure of melt-spun Ce–Fe–B magnets. IEEE Trans Magn. 2015;51(11):1.Google Scholar
  11. [11]
    Li ZB, Shen BG, Zhang M, Hu FX, Sun JR. Substitution of Ce for Nd in preparing R2Fe14B nanocrystalline magnets. J Alloy Compd. 2015;628:325.CrossRefGoogle Scholar
  12. [12]
    Skoug EJ, Meyer MS, Pinkerton FE, Tessema MM, Haddad D, Herbst JF. Crystal structure and magnetic properties of Ce2Fe14−xCoxB alloys. J Alloy Compd. 2013;574(10):552.CrossRefGoogle Scholar
  13. [13]
    Okada M, Sugimoto S, Ishizaka C, Tanaka T, Homma M. Didymium–Fe–B sintered permanent magnets. New Front Rare Earth Sci Appl. 1985;57(8):4146.Google Scholar
  14. [14]
    Zhu MG, Li W, Wang JD, Zheng L, Li Y, Zhang K. Influence of Ce content on the rectangularity of demagnetization curves and magnetic properties of Re–Fe–B magnets sintered by double main phase alloy method. IEEE Trans Magn. 2014;50(1):1000104.Google Scholar
  15. [15]
    Wang XC, Zhu MG, Li W, Zheng LY, Guo ZH, Du X, Du A. Effects of the ingot phase transition on microstructure and magnetic properties of CeNdFeB melt-spun ribbons. Physica B Phys Condens Matter. 2015;476:150.CrossRefGoogle Scholar
  16. [16]
    Herbst JF. R2Fe14B materials: intrinsic properties and technological aspects. Rev Mod Phys. 1991;63(63):819.CrossRefGoogle Scholar
  17. [17]
    Yan CJ, Guo S, Chen RJ, Lee D, Yan AR. Effect of Ce on the magnetic properties and microstructure of sintered didymium–Fe–B magnets. IEEE Trans Magn. 2014;50(10):1.CrossRefGoogle Scholar
  18. [18]
    Chang HW, Chen CH, Chang CW, Hsieh CC, Guo ZH, Chang WC. High magnetic properties of nanocomposite ribbons made with mischmetals–Fe–Co–Ti–B alloys. J Appl Phys. 2009;105(7):1943.Google Scholar
  19. [19]
    Li D, Bogatin Y. Effect of composition on the magnetic properties of (Ce1−xNdx)13.5(Fe1−yzCoySiz)80B6.5, sintered magnets. J Appl Phys. 1991;69(8):5515.CrossRefGoogle Scholar
  20. [20]
    Zhu M, Li W, Wang JD, Zheng LY, Li YF, Zhang K, Feng HB, Liu T. Influence of Ce content on the rectangularity of demagnetization curves and magnetic properties of Re–Fe–B magnets sintered by double main phase alloy method. IEEE Trans Magn. 2013;50(1):1.Google Scholar
  21. [21]
    Huang SL, Feng HB, Zhu MG, Li AH, Li YF, Sun YC, Zhang Y, Li W. Optimal design of sintered Ce9Nd21FebalB1 magnets with a low-melting-point (Ce, Nd)-rich phase. Min Met Maters. 2015;22(4):417.CrossRefGoogle Scholar
  22. [22]
    Pathak AK, Jr KAG, Khan M, McCallum RW, Pecharsky VK. High performance Nd–Fe–B permanent magnets without critical elements. J Alloy Compd. 2016;668:80.CrossRefGoogle Scholar
  23. [23]
    Niu E, Chen ZA, Chen GA, Zhang YG, Zhang J, Rao XL, Hu BP, Wang ZX. Achievement of high coercivity in sintered R–Fe–B magnets based on misch-metal by dual alloy method. J Appl Phys. 2014;115(11):113912.CrossRefGoogle Scholar
  24. [24]
    Zhou XQ, Liu SY, Liu XK, Zhang M, Ding Y. Effects of Ce substitution amount on microstructure and properties of sintered NdFeB magnets. Electron Compon Mater. 2013;32(12):25.Google Scholar
  25. [25]
    Fu WB, Guo S, Lin CW, Chen RJ, Liu XC, Lee D, Yan AR. Effect of rare-earth content on coercivity and temperature stability of sintered Nd–Fe–B magnets prepared by dual-alloy method. IEEE Trans Magn. 2013;49(7):3258.CrossRefGoogle Scholar
  26. [26]
    Cui XG, Cui CY, Cheng XN, Xu XJ, Ma TY, Yan M, Wang C. Effects of alignment on the magnetic and mechanical properties of sintered Nd–Fe–B magnets. J Alloy Compd. 2013;563(9):161.CrossRefGoogle Scholar
  27. [27]
    Kelly PE, O’Grady K, Mayo PI. Switching mechanisms in cobalt phosphorus thin films. In: Magnetics conference, 1989. Digests of INTERMAG ‘89. International. Washington: IEEE; 1989. HA5.Google Scholar
  28. [28]
    Bao XQ, Gao XX, Zhu J, Zhou SZ. Effect of zirconium content on exchange coupling and magnetization reversal of nanocrystalline Nd12.3Fe81.7−xZrxB6. J Rare Earths. 2011;29(10):939.CrossRefGoogle Scholar
  29. [29]
    Ni BJ, Xu H, Tan XH, Hou XL. Study on magnetic properties of Ce17Fe78−xZrxB6 (x = 0–2.0) alloys. J Magn Magn Mater. 2016;401:784.CrossRefGoogle Scholar
  30. [30]
    Zhang M, Li ZB, Shen BG, Hu FX, Sun JR. Permanent magnetic properties of rapidly quenched (La, Ce)2Fe14B nanomaterials based on La–Ce mischmetal. J Alloy Compd. 2015;651:144.CrossRefGoogle Scholar

Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Materials Science and EngineeringSichuan UniversityChengduChina
  2. 2.Key Laboratory of Advanced Special Material and TechnologyMinistry of EducationChengduChina

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