4.7 Article

Coercivity and thermal stability enhancement of Nd-Fe-B magnet by grain boundary diffusing Tb-Y-La-Cu alloys

Related references

Note: Only part of the references are listed.
Article Materials Science, Multidisciplinary

Coercivity enhancement of the sintered Nd-Ce-Fe-B magnet via grain boundary diffusion with Tb70Fe30 alloy

Ruihua Du et al.

Summary: Commercial N45 sintered Nd-Ce-Fe-B magnets were processed by grain boundary diffusion (GBD) with Tb and Tb70Fe30 alloys, leading to improved coercivity and remanence. The Tb70Fe30 GBD magnet showed higher remanence and a reduced Tb-rich shell thickness.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2022)

Article Materials Science, Multidisciplinary

Enhancing the grain boundary diffusion efficiency of Tb for Nd-Fe-B magnets using dual-alloy diffusion source

Wenyue Song et al.

Summary: Grain boundary diffusion is an effective method to enhance coercivity for Nd-Fe-B magnets with reduced consumption of heavy rare earths. This study proposes a dual-alloy diffusion source to improve the diffusion of Tb element, which significantly enhances the coercivity and magnetic hysteresis loop squareness of the magnet. The use of a dual-alloy diffusion source allows for efficient utilization of HRE resources and increased infiltration depth, making it attractive for industrial applications.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)

Article Nanoscience & Nanotechnology

Tuning the distribution of Tb in Nd-Fe-B sintered magnet to overcome the magnetic properties trade-off

Zhanjia Wang et al.

Summary: A new solid-liquid phase separation diffusion method was reported in this study, which significantly enhanced the permanent magnetic performance of Nd-Fe-B magnets, particularly the demagnetization curve squareness, by avoiding the evident Tb gradient commonly seen in current GBD magnets.

SCRIPTA MATERIALIA (2022)

Article Materials Science, Multidisciplinary

High coercivity Nd-Fe-B magnet with low Tb concentration by combined diffusion

Shuai Cao et al.

Summary: The commercial N50 Nd-Fe-B magnet underwent a combined diffusion process with Pr65Cu15Al20 and Pr50Tb30Al20, resulting in an increase in coercivity and the formation of uniform Tb-rich shells. The combined diffusion process proved effective in promoting Tb diffusion along grain boundaries and enhancing Tb availability.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2021)

Article Chemistry, Physical

Effective microstructure optimization and coercivity enhancement of sintered Nd-Fe-B magnet by grain boundary diffusion of Pr60Tb13Al27 alloy

Lei Jin et al.

Summary: The commercial sintered Nd-Fe-B magnet was processed by grain boundary diffusion using Pr60Tb13Al27 and Tb73Al27 alloys. The substitution of Tb by Pr in the Tb73Al27 alloy can further enhance coercivity, leading to reduced Tb-rich shell thickness and the formation of a two-layer Tb-rich shell in the magnet diffused by Pr60Tb13Al27. The presence of a large number of continuous grain boundary phases significantly enhances the exchange-decoupling effect between adjacent grains.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Article Materials Science, Multidisciplinary

Development of cost-effective nanocrystalline multi-component (Ce,La,Y)-Fe-B permanent magnetic alloys containing no critical rare earth elements of Dy, Tb, Pr and Nd

Xuefeng Liao et al.

Summary: The study reveals that La and Y have positive effects on room-temperature magnetic properties and thermal stability, with La substitution enhancing coercivity and Y substitution improving remanent polarization and thermal stability.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

Article Nanoscience & Nanotechnology

Formation mechanism of Tb-rich shell in grain boundary diffusion processed Nd-Fe-B sintered magnets

Tae-Hoon Kim et al.

SCRIPTA MATERIALIA (2020)

Article Nanoscience & Nanotechnology

Highly efficient Tb-utilization in sintered Nd-Fe-B magnets by Al aided TbH2 grain boundary diffusion

Jinghui Di et al.

SCRIPTA MATERIALIA (2018)

Article Materials Science, Multidisciplinary

Anisotropic diffusion mechanism in grain boundary diffusion processed Nd-Fe-B sintered magnet

Tae-Hoon Kim et al.

ACTA MATERIALIA (2016)

Article Chemistry, Physical

The partitioning of La and Y in Nd-Fe-B magnets: A first-principles study

X. B. Liu et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2013)

Article Physics, Applied

The partitioning of Dy and Tb in NdFeB magnets: A first-principles study

X. B. Liu et al.

JOURNAL OF APPLIED PHYSICS (2012)

Article Nanoscience & Nanotechnology

Strategy for high-coercivity Nd-Fe-B magnets

K. Hono et al.

SCRIPTA MATERIALIA (2012)

Article Materials Science, Multidisciplinary

Distribution of Dy in high-coercivity (Nd,Dy)-Fe-B sintered magnet

W. F. Li et al.

ACTA MATERIALIA (2011)

Review Chemistry, Multidisciplinary

Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient

Oliver Gutfleisch et al.

ADVANCED MATERIALS (2011)