Grain refinement and coercivity enhancement of sintered Nd–Fe–B alloys by doping eutectic alloy (Nd_0.75Pr_0.25)₇₀Cu_30.

References

• Sagawa M, Fujimura S, Togawa N, et al. New material for permanent magnets on a base of Nd and Fe (invited). J Appl Phys. 1984;55:2083–2087. doi:10.1063/1.333572
   Web of Science ®Google Scholar
• Croat JJ, Herbst JF, Lee RW, et al. Pr-Fe and Nd-Fe-based materials: a new class of high-performance permanent magnets (invited). J Appl Phys. 1984;55:2078–2082. doi:10.1063/1.333571
   Web of Science ®Google Scholar
• Gutfleisch O, Willard MA, Brück E, et al. Magnetic materials and devices for the 21st century: stronger, lighter, and more energy efficient. Adv Mater. 2011;23:821–842. doi:10.1002/adma.201002180
   PubMed Web of Science ®Google Scholar
• Nguyen RT, Imholte DD, Matthews AC, et al. Ndfeb content in ancillary motors of U.S. conventional passenger cars and light trucks: results from the field. Waste Manage. 2019;83:209–217. doi:10.1016/j.wasman.2018.11.017
   PubMed Web of Science ®Google Scholar
• Li WF, Sepehri-Amin H, Ohkubo T, et al. Distribution of Dy in high-coercivity (Nd,Dy)-Fe-B sintered magnet. Acta Mater. 2011;59:3061–3069. doi:10.1016/j.actamat.2011.01.046
   Web of Science ®Google Scholar
• Hono K, Sepehri-Amin H. Strategy for high-coercivity Nd-Fe-B magnets. Scr Mater. 2012;67:530–535. doi:10.1016/j.scriptamat.2012.06.038
   Web of Science ®Google Scholar
• Kim TH, Sasaki TT, Ohkubo T, et al. Microstructure and coercivity of grain boundary diffusion processed Dy-free and Dy-containing Nd-Fe-B sintered magnets. Acta Mater. 2019;172:139–149. doi:10.1016/j.actamat.2019.04.032
   Web of Science ®Google Scholar
• Lee YI, Wong YJ, Chang HW, et al. Coercivity enhancement of hot-deformed NdFeB magnets by doping R80Ga20 (R  =  Pr, Dy, Tb) alloys. J Magn Magn Mater. 2019;478:43–47. doi:10.1016/j.jmmm.2019.01.090
   Web of Science ®Google Scholar
• He J, Cao J, Yu Z, et al. Grain boundary diffusion sources and their coating methods for Nd-Fe-b permanent magnets. Metals (Basel). 2021;11:1–16. doi:10.3390/met11091434
   Web of Science ®Google Scholar
• Guo S, Yang X, Fan X, et al. The effect of grain size on the diffusion efficiency and microstructure of sintered Nd-Fe-B magnets by Tb grain boundary diffusion. Materials (Basel). 2022;15; doi:10.3390/ma15144987
   Web of Science ®Google Scholar
• Liu Z, He J, Ramanujan RV. Significant progress of grain boundary diffusion process for cost-effective rare earth permanent magnets: A review. Mater Des. 2021;209:110004, doi:10.1016/j.matdes.2021.110004
   Web of Science ®Google Scholar
• Tang X(唐鑫), Chen R(陈仁杰), Yin W(尹文宗), et al. Enhanced texture in die-upset nanocomposite magnets by Nd-Cu grain boundary diffusion. Appl Phys Lett. 2013;102:72409, doi:10.1063/1.4793429
   Web of Science ®Google Scholar
• Liu ZW, Zhao LZ, Hu SL, et al. Coercivity and thermal stability enhancement for spark-plasma-sintered nanocrystalline NdFeB magnets with Dy2O3 and Zn additions. IEEE Trans Magn. 2015;51:3–6. doi:10.1109/TMAG.2015.2434943
   Web of Science ®Google Scholar
• Žagar K, Kocjan A, Kobe S. Magnetic and microstructural investigation of high-coercivity net-shape Nd–Fe–B-type magnets produced from spark-plasma-sintered melt-spun ribbons blended with DyF3. J Magn Magn Mater. 2016;403:90–96. doi:10.1016/j.jmmm.2015.11.082
   Web of Science ®Google Scholar
• Cui XG, Shu GY, Pan JX, et al. Enhanced magnetic properties and thermal stability of spark plasma sintered multi-main-phase Nd-Ce-Fe-B magnet via co-adding DyF3 and Cu. J Alloys Compd. 2022;902; doi:10.1016/j.jallcom.2022.163786
   Web of Science ®Google Scholar
• Li X, Jiang Q-Z, Rehman SU, et al. Structural evolution and improvement of magnetic properties of hot-deformed CeFeB magnets with Nd70Cu30 addition. Intermetallics (Barking). 2022;143:107475, doi:10.1016/j.intermet.2022.107475
   Web of Science ®Google Scholar
• Zhang T, Xing W, Chen F, et al. Microstructure and phase evolution mechanism in Hot-pressed and Hot-deformed Nd-Fe-B magnets with Nd85Cu15 addition. Acta Mater. 2021;204:116493, doi:10.1016/j.actamat.2020.116493
   Web of Science ®Google Scholar
• Huang Y, Nie H, Liu Y, et al. Production of anisotropic hot deformed Nd-Fe-B magnets with the addition of Pr-Cu-Al alloy based on nanocomposite ribbon. J Alloys Compd. 2022;892:162072. doi:10.1016/j.jallcom.2021.162072
   Web of Science ®Google Scholar
• Zhang L, Wang M, Yan X, et al. Effect of low-melting point phases on the microstructure and properties of spark plasma sintered and hot deformed Nd-Fe-B alloys. J Magn Magn Mater. 2018;452:483–487. doi:10.1016/j.jmmm.2017.11.044
   Web of Science ®Google Scholar
• Tang Y, Li Y, Xu X, et al. Analysis on deformation and texture formation mechanism of hot-deformed Nd-Fe-B magnets based on heterogeneous structure evolution. J Mater Sci Technol. 2021;80:28–35. doi:10.1016/j.jmst.2020.11.051
   Web of Science ®Google Scholar
• Song T, Tang X, Yin W, et al. Magnetic properties improvement of hot-deformed Nd–Fe–B permanent magnets by Pr-Cu eutectic pre-diffusion process acta materialia magnetic properties improvement of hot-deformed Nd-Fe-B permanent magnets by Pr-Cu eutectic pre-diffusion process. Acta Mater. 2019;174:332–341. doi:10.1016/j.actamat.2019.05.065
   Web of Science ®Google Scholar