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- Effect of Substrate Pre-heating on Microstructure and Magnetic Properties of Nd-Fe-B Permanent Magnet Manufactured by L-PBF
- Yeon Woo Kim, Haeum Park, Tae-Hoon Kim, Kyung Tae Kim, Ji-Hun Yu, Yoon Suk Choi, Jeong Min Park
- J Powder Mater. 2023;30(2):116-122. Published online April 1, 2023
- DOI: https://doi.org/10.4150/KPMI.2023.30.2.116
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Abstract
PDF Because magnets fabricated using Nd-Fe-B exhibit excellent magnetic properties, this novel material is used in various high-tech industries. However, because of the brittleness and low formability of Nd-Fe-B magnets, the design freedom of shapes for improving the performance is limited based on conventional tooling and postprocessing. Laserpowder bed fusion (L-PBF), the most famous additive manufacturing (AM) technique, has recently emerged as a novel process for producing geometrically complex shapes of Nd-Fe-B parts owing to its high precision and good spatial resolution. However, because of the repeated thermal shock applied to the materials during L-PBF, it is difficult to fabricate a dense Nd-Fe-B magnet. In this study, a high-density (>96%) Nd-Fe-B magnet is successfully fabricated by minimizing the thermal residual stress caused by substrate heating during L-PBF.
- Effect of Cu Content on Microstructural and Magnetic Properties of a Nd-Fe-B Strip Cast
- Song-E Park, Tae-Hoon Kim, Seong-Rae Lee, Dong-Hwan Kim, Seok NamKung, Tae-Suk Jang
- J Korean Powder Metall Inst. 2011;18(1):24-28.
- DOI: https://doi.org/10.4150/KPMI.2011.18.1.024
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- 2 Citations
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Abstract
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- Effect of Cu content on microstructural and magnetic properties of a (Nd_26.06,Dy_6.51)Fe_bal. Cu_xB_0.97(wt.%), (x = 0.2, 0.3, 0.4, 0.5) strip-cast was studied. The average inter-lamellar spacing in the free surface and wheel side of the strip cast increased as the Cu content increases. The grain uniformity, the grain alignment, and (00L) texture of the strip cast increased with Cu contents up to 0.4 wt.%. These microstructural changes were attributed to the decrease of the effective cooling rate of the melted alloy caused by the decrease of the melting temperature of resulting from Cu addition. Coercivity and remanence were increased because of the grain alignment and (00L) texture improvement with Cu contents up to 0.4 wt.%.
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- Microstructure and magnetic properties of (Nd,Dy)FeB and (Nd,Pr)FeB strips
Seung-Yeon Park, Jin-Ho Kim, Kyoung-Mook Lim, Sung-Yong Ahn, Kang Ryong Choi, Chul-Sung Kim
Journal of the Korean Physical Society.2015; 66(11): 1755. CrossRef - Effects of the cooling rate on the microstructure of Nd-Fe-B alloys fabricated by strip casting
Kyoung-Mook Lim, Seung-Yeon Park, Sung-Yong Ahn, Chul-Sung Kim
Journal of the Korean Physical Society.2013; 63(6): 1203. CrossRef
- Microstructure and magnetic properties of (Nd,Dy)FeB and (Nd,Pr)FeB strips
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