Development of Dy-free Nd-Fe-B-based sintered magnet through grain boundary engineering using Pr-Cu alloys

Tang, Wei; Ouyang, Gaoyuan; Wang, Jing; Dasari, Harika; Kramer, Matthew J.; Anderson, Iver E.; Cui, Jun

doi:10.1109/tmag.2023.3282430

Development of Dy-free Nd-Fe-B-based sintered magnet through grain boundary engineering using Pr-Cu alloys

Journal Article · Fri Jun 02 00:00:00 EDT 2023 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/tmag.2023.3282430· OSTI ID:1986177

^[1]; ^[1]; Wang, Jing ^[1]; Dasari, Harika ^[2]; Kramer, Matthew J. ^[3]; Anderson, Iver E. ^[3]; Cui, Jun ^[3]

Ames Laboratory (AMES), Ames, IA (United States)
Iowa State Univ., Ames, IA (United States)
Ames Laboratory (AMES), Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

For this study, Dy-free sintered magnets were fabricated by mixing Nd-Fe-B powder with various amounts of Pr-Cu powder followed by the common procedures for making Nd-Fe-B based sintered magnets. With the Pr-Cu addition increasing from 0 to 10 wt.%, the obtained magnets’ H_cj increases from the original 14.5 kOe to 18.6 kOe. The highest (BH)_max achieved was 35.0 MGOe with 7.5 wt.% PrCu. The distribution of the Pr and Cu elements was primarily at grain boundary and triple junctions, leading to a reduced coupling among grains, thus an enhanced H_cj.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1986177

Report Number(s):: IS-J--11,072

Journal Information:: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 11 Vol. 59; ISSN 0018-9464

Publisher:: Institute of Electrical and Electronics Engineers. Magnetics GroupCopyright Statement

Country of Publication:: United States

Language:: English

References (14)

The coercive field of sintered and melt-spun NdFeB magnets Durst, K. -D.; Kronmüller, H. Journal of Magnetism and Magnetic Materials, Vol. 68, Issue 1 https://doi.org/10.1016/0304-8853(87)90097-7	journal	August 1987
Perspective and Prospects for Rare Earth Permanent Magnets Coey, J. M. D. Engineering, Vol. 6, Issue 2 https://doi.org/10.1016/j.eng.2018.11.034	journal	February 2020
Study of high-coercivity sintered NdFeB magnets Bai, G.; Gao, R. W.; Sun, Y. Journal of Magnetism and Magnetic Materials, Vol. 308, Issue 1 https://doi.org/10.1016/j.jmmm.2006.04.029	journal	January 2007
Magnetic and mechanical properties of grain-refined Dy-free Nd-Fe-B sintered magnets Tang, Wei; Ouyang, Gaoyuan; Cui, Baozhi Journal of Magnetism and Magnetic Materials, Vol. 521 https://doi.org/10.1016/j.jmmm.2020.167533	journal	March 2021
Significant progress of grain boundary diffusion process for cost-effective rare earth permanent magnets: A review Liu, Zhongwu; He, Jiayi; Ramanujan, Raju V. Materials & Design, Vol. 209 https://doi.org/10.1016/j.matdes.2021.110004	journal	November 2021
Strategy for high-coercivity Nd–Fe–B magnets Hono, K.; Sepehri-Amin, H. Scripta Materialia, Vol. 67, Issue 6 https://doi.org/10.1016/j.scriptamat.2012.06.038	journal	September 2012
Micromagnetic simulations on the grain size dependence of coercivity in anisotropic Nd–Fe–B sintered magnets Sepehri-Amin, H.; Ohkubo, T.; Gruber, M. Scripta Materialia, Vol. 89 https://doi.org/10.1016/j.scriptamat.2014.06.020	journal	October 2014
New material for permanent magnets on a base of Nd and Fe (invited) Sagawa, M.; Fujimura, S.; Togawa, N. Journal of Applied Physics, Vol. 55, Issue 6 https://doi.org/10.1063/1.333572	journal	March 1984
Magnetization reversal in nucleation controlled magnets. II. Effect of grain size and size distribution on intrinsic coercivity of Fe‐Nd‐B magnets Ramesh, R.; Thomas, G.; Ma, B. M. Journal of Applied Physics, Vol. 64, Issue 11 https://doi.org/10.1063/1.342055	journal	December 1988
Two-powder Nd2Fe14B magnets with DyGa-addition de Groot, C. H.; Buschow, K. H. J.; de Boer, F. R. Journal of Applied Physics, Vol. 83, Issue 1 https://doi.org/10.1063/1.366734	journal	January 1998
Coercivity enhancement in Dy-free Nd–Fe–B sintered magnets by using Pr-Cu alloy Wan, Fangming; Zhang, Yinfeng; Han, Jingzhi Journal of Applied Physics, Vol. 115, Issue 20 https://doi.org/10.1063/1.4879898	journal	May 2014
Dependence of the Mean Grain Size and Coercivity of Sintered Nd–Fe–B Magnets on the Initial Powder Particle Size Uestuener, K.; Katter, M.; Rodewald, W. IEEE Transactions on Magnetics, Vol. 42, Issue 10 https://doi.org/10.1109/TMAG.2006.879889	journal	October 2006
Coercivity Enhancement by the Grain Boundary Diffusion Process to Nd–Fe–B Sintered Magnets Hirota, K.; Nakamura, H.; Minowa, T. IEEE Transactions on Magnetics, Vol. 42, Issue 10 https://doi.org/10.1109/TMAG.2006.879906	journal	October 2006
Evaluation of the Microstructural Contribution to the Coercivity of Fine-Grained Nd–Fe–B Sintered Magnets Fukada, Togo; Matsuura, Masashi; Goto, Ryota MATERIALS TRANSACTIONS, Vol. 53, Issue 11 https://doi.org/10.2320/matertrans.MAW201207	journal	January 2012

Similar Records

Effect of different grain boundary diffusion alloys on magnetic properties of Dy-free sintered NdFeB magnet

Journal Article · Thu May 09 00:00:00 EDT 2024 · IEEE Transactions on Magnetics · OSTI ID:2367346

Magnetic properties of sintered permanent magnets R-Fe-Cu-B (R = Pr, Nd)

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA) · OSTI ID:5876861

Magnetic and mechanical properties of grain-refined Dy-free Nd-Fe-B sintered magnets

Journal Article · Mon Nov 09 23:00:00 EST 2020 · Journal of Magnetism and Magnetic Materials · OSTI ID:1722887

Related Subjects

36 MATERIALS SCIENCE
Pr-Cu alloy
grain boundary engineering
magnetic properties
microstructure
sintered Nd-Fe-B-based magnets

Development of Dy-free Nd-Fe-B-based sintered magnet through grain boundary engineering using Pr-Cu alloys

Citation Formats

References (14)

Similar Records

Related Subjects