4.7 Article

Effect of particle size on grain growth of Nd-Fe-B powders produced by gas atomization

Related references

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

Progress on modification of microstructures and magnetic properties of Nd-Fe-B magnets by the grain boundary diffusion engineering

Meng Lv et al.

Summary: Nd-Fe-B magnets are widely used in high-tech fields due to their excellent magnetic properties. With the rapid development of the electric vehicle industry, there is a higher demand for these magnets, especially in terms of coercivity. The new technology of Grain Boundary Diffusion has been proposed to effectively increase the coercivity of Nd-Fe-B magnets.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2021)

Article Materials Science, Multidisciplinary

Improved coercivity and squareness in bulk hot-deformed Nd-Fe-B magnets by two-step eutectic grain boundary diffusion process

Xin Tang et al.

Summary: A novel method was introduced to improve the squareness and coercivity of bulk hot-deformed Nd-Fe-B magnets through two step diffusion, resulting in a more uniform HRE shell. Magneto-optical Kerr effect microscopy showed strong pinning of magnetic domain wall motion at side grain boundaries in the two-step diffusion processed magnet.

ACTA MATERIALIA (2021)

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 Materials Science, Multidisciplinary

Effect of neodymium content and niobium addition on grain growth of Nd-Fe-B powders produced by gas atomization

G. Sarriegui et al.

Summary: Nd-Fe-B powders of different compositions were produced by gas atomization and annealed multiple times to study microstructural evolution. The study found that Nd content and Nb addition have significant effects on microstructural changes, especially on grain growth.

MATERIALS CHARACTERIZATION (2021)

Article Materials Science, Multidisciplinary

Grain boundary oxide layers in NdFeB-based permanent magnets

A. Mazilkin et al.

Summary: The microstructure of grain boundaries in commercial NdFeB-based alloy for permanent magnets reveals the presence of neodymium oxide Nd2O3 layers which contribute to magnetic isolation between Nd2Fe14B grains, enhancing coercivity of the alloy.

MATERIALS & DESIGN (2021)

Article Materials Science, Multidisciplinary

Most frequently asked questions about the coercivity of Nd-Fe-B permanent magnets

Jiangnan Li et al.

Summary: The coercivity of commercial magnets is typically around 0.2 H-A, known as Brown's paradox, but recent studies have shown that the magnetism of a thin layer along grain boundaries plays a critical role in influencing the coercivity of magnets. By using various microstructure characterization techniques and simulation models, researchers are working towards improving the coercivity of Nd-Fe-B magnets to its limit.

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS (2021)

Article Chemistry, Physical

Optimized Microstructure and Improved Magnetic Properties of Pr-Dy-Al-Ga Diffused Sintered Nd-Fe-B Magnets

Pengpeng Qu et al.

Summary: The grain boundary diffusion process (GBDP) significantly improves the magnetic properties and thermal stability of sintered Nd-Fe-B magnets, enhancing coercivity and decreasing remanence. Diffusing Dy70Al10Ga20 and (Pr75Dy25)(70)Al10Ga20 alloys leads to an increase in coercivity and an improvement in thermal stability of the magnets. The microstructure modifications, such as Rare-earth-rich grain boundary phases and core-shell structures, play a crucial role in enhancing coercivity.

MATERIALS (2021)

Article Chemistry, Physical

Comparison of (Pr, Nd)Hx grain boundary restructuring and diffusion on the magnetic properties of Nd-La-Ce-Fe-B sintered magnet

Yongsheng Liu et al.

Summary: Through the methods of grain boundary restructuring and grain boundary diffusion process, the introduction of (Pr, Nd)H-x into La-Ce-40 sintered magnet successfully increased the coercivity of the magnet. The grain boundary diffusion process can maintain a higher remanence compared to grain boundary restructuring.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

Review Engineering, Multidisciplinary

Perspective and Prospects for Rare Earth Permanent Magnets

J. M. D. Coey

ENGINEERING (2020)

Article Engineering, Electrical & Electronic

Permanent Magnets Beyond Nd-Dy-Fe-B

Satoshi Hirosawa

IEEE TRANSACTIONS ON MAGNETICS (2019)

Article Engineering, Electrical & Electronic

Magnetic Properties of NdFeB Alloys Obtained by Gas Atomization Technique

G. Sarriegui et al.

IEEE TRANSACTIONS ON MAGNETICS (2018)

Review Green & Sustainable Science & Technology

REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Review

Yongxiang Yang et al.

JOURNAL OF SUSTAINABLE METALLURGY (2017)

Review Nanoscience & Nanotechnology

Perspectives for high-performance permanent magnets: applications, coercivity, and new materials*

Satoshi Hirosawa et al.

ADVANCES IN NATURAL SCIENCES-NANOSCIENCE AND NANOTECHNOLOGY (2017)

Article Materials Science, Multidisciplinary

Structure and chemical compositions of the grain boundary phase in Nd-Fe-B sintered magnets

T. T. Sasaki et al.

ACTA MATERIALIA (2016)

Article Physics, Applied

Micromagnetic simulations on the grain shape effect in Nd-Fe-B magnets

Min Yi et al.

JOURNAL OF APPLIED PHYSICS (2016)

Article Materials Science, Multidisciplinary

Thermodynamics of Oxygen in the Fe-Nd-O System for Production of Dy Free Nd-Fe-B Magnet

Takahiro Oshino et al.

MATERIALS TRANSACTIONS (2016)

Article Chemistry, Physical

Effects of alignment on the magnetic and mechanical properties of sintered Nd-Fe-B magnets

X. G. Cui et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2013)

Article Chemistry, Physical

Critical thermodynamic evaluation and optimization of the Fe-B, Fe-Nd, B-Nd and Nd-Fe-B systems

Marie-Aline Van Ende et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2013)

Article Materials Science, Multidisciplinary

Relation between Nd2Fe14B grain alignment and coercive force decrease ratio in NdFeB sintered magnets

Yutaka Matsuura et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2013)

Article Materials Science, Multidisciplinary

Estimation of Cooling Rates During Close-Coupled Gas Atomization Using Secondary Dendrite Arm Spacing Measurement

Andrew M. Mullis et al.

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE (2013)

Article Materials Science, Multidisciplinary

Grain boundary wetting in the NdFeB-based hard magnetic alloys

B. B. Straumal et al.

JOURNAL OF MATERIALS SCIENCE (2012)

Article Nanoscience & Nanotechnology

Strategy for high-coercivity Nd-Fe-B magnets

K. Hono et al.

SCRIPTA MATERIALIA (2012)

Article Materials Science, Multidisciplinary

The origin of coercivity decrease in fine grained Nd-Fe-B sintered magnets

W. F. Li et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2009)

Article Engineering, Electrical & Electronic

Wettability and Interfacial Microstructure Between Nd2Fe14B and Nd-Rich Phases in Nd-Fe-B Alloys

Ryota Goto et al.

IEEE TRANSACTIONS ON MAGNETICS (2008)

Article Nanoscience & Nanotechnology

Dependence of the crystal structure of the Nd-rich phase on oxygen content in an Nd-Fe-B sintered magnet

Wenjian Mo et al.

SCRIPTA MATERIALIA (2008)

Article Materials Science, Multidisciplinary

Recent development in bonded NdFeB magnets

BM Ma et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2002)