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1999•Journal of the Japan Society of Powder and Powder MetallurgyOpen access

Fifteen Years Since the NdFeB Magnet was Preented.

Masato Sagawa

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Abstract

A brief review is given about the researches on rare earth permanent magnets conducted in 15 years since the NdFeB permanent magnet was presented. It is then pointed out that important subjects left behind are development of a net-shape-process for NdFeB sintered magnets and development of NdFeB sintered magnets containing not much Dy that can be used up to 200°C or so. To develop such magnets, the mechanism of nucleation of reversed domain has to be clarified.

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What this paper is about

A brief review is given about the researches on rare earth permanent magnets conducted in 15 years since the NdFeB permanent magnet was presented. It is then pointed out that important subjects left behind are development of a net-shape-process for NdFeB sintered magnets and development of NdFeB sintered magnets containing not much Dy that can be used up to 200°C or so. To develop such magnets, the mechanism of nucleation of reversed domain has to be clarified.

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Available abstract

A brief review is given about the researches on rare earth permanent magnets conducted in 15 years since the NdFeB permanent magnet was presented. It is then pointed out that important subjects left behind are development of a net-shape-process for NdFeB sintered magnets and development of NdFeB sintered magnets containing not much Dy that can be used up to 200°C or so. To develop such magnets, the mechanism of nucleation of reversed domain has to be clarified.

Key concepts: Neodymium magnet, Magnet, Nucleation, Materials science, Rare earth, Metallurgy, Mechanical engineering, Engineering

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