Material and magnetic properties of Sm^sub 2^(Co, Fe, Cu, Zr)^sub 17^ permanent magnets processed by Spark Plasma Sintering

Improvements to the properties of Rare Earth Permanent Magnets (REPMs) are needed to advance the capabilities of electric motors and generators, and refinement of the microstructure by the use of different approaches to processing may be a key means to achieving this. We report here a systematic stu...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 770; p. 765
Main Authors Mackie, Alexander J, Dean, Julian S, Goodall, Russell
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier BV 05.01.2019
Subjects
Alloys
Cobalt
Copper
Densification
Electric motors
Electric properties
Electromagnetism
Industry standards
Intermetallic compounds
Iron
Magnetic properties
Microstructure
Permanent magnets
Plasma sintering
Powder metallurgy
Rare earth elements
Sinter
Spark plasma sintering
Theoretical density
Vacuum sintering
Zirconium
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Summary:Improvements to the properties of Rare Earth Permanent Magnets (REPMs) are needed to advance the capabilities of electric motors and generators, and refinement of the microstructure by the use of different approaches to processing may be a key means to achieving this. We report here a systematic study into the use of Spark Plasma Sintering to process Sm2(Co, Fe, Cu, Zr)17 permanent magnets. This unfamiliar method for Sm2(Co, Fe, Cu, Zr)17 offers the potential for efficiency savings in reduced processing temperatures and times versus the industry standard vacuum sinter powder metallurgical route, and also offers a refined microstructure of the materials produced. The optimised processing conditions for achieving near-to-theoretical density are reported, and the microstructure and magnetic properties of the materials produced are compared with conventional vacuum sintering. The results provide a basis for further optimisation of these materials.
ISSN:0925-8388
1873-4669