Abstract
The effect of WS2 (0–1.2 wt.%) and Al (0.3 wt.%) doping on microstructural and magnetic properties of Nd2Fe14B sintered magnets was investigated. Grain growth in WS2-doped magnets was inhibited by the grain boundary (GB) pinning resulting in increased magnet coercivity. Al co-doping (0.3 wt.%) produced continuous Nd-rich grain boundary phases (GBPs), in which fine WFeB precipitates were distributed selectively at the grain boundaries due to the higher fluidity of the liquid phases. 0.6 wt.% WS2/Al co-doped magnets are characterized by the optimum magnetic properties because of the smaller grain sizes and formation of continuous Nd-rich GB phases. When the WS2 content exceeds 0.6 wt.%, magnetic properties of the resulting magnets deteriorate due to the reduction in magnet density and relatively large WFeB precipitates formed inside the main phase and at the GBs.
Original language | English |
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Pages (from-to) | 321-326 |
Number of pages | 6 |
Journal | Journal of Alloys and Compounds |
Volume | 673 |
DOIs | |
Publication status | Published - 2016 Jul 15 |
Bibliographical note
Funding Information:This research was supported by the Technology Innovation Program funded by the Ministry of Knowledge Economy (MKE, Korea) (Grant No. 10043780 ), Republic of Korea.
Publisher Copyright:
© 2016 Elsevier B.V.
Keywords
- Magnetic measurements
- Magnetization
- Microstructure
- Powder metallurgy
- Rare earth alloys and compounds
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry