Journal of Powder Materials

Tae-Suk Jang

3 Articles

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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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

Production and Application of Nd-Fe-B Sintered Magnets: Se-Hoon Kim, Young-Do Kim, Tae-Suk Jang; J Korean Powder Metall Inst. 2008;15(4):263-270.; DOI: https://doi.org/10.4150/KPMI.2008.15.4.263

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A novel composite hot-extruded Nd-Fe-B permanent magnetic ring
Yajing Li, Siyuan Zuo, Liyun Zheng, Minggang Zhu, Yikun Fang, Lixin Zhao, Chenglin Li, Wei Li, George C. Hadjipanayis
Journal of Magnetism and Magnetic Materials.2023; 577: 170781. CrossRef
Sintering Behavior and Phase Analysis of (Nd, Dy)-Fe-B Powder
Se-Hoon Kim, Jin-Woo Kim, Young-Do Kim
Journal of Korean Powder Metallurgy Institute.2010; 17(2): 154. CrossRef
Trend in Research and Development Related to Sm-Fe-N Bonded Magnets
Jung-Goo Lee, Hun Kwak, Chul-Jin Choi, Joon-Chul Yun, Jai-Sung Lee
Journal of Korean Powder Metallurgy Institute.2009; 16(1): 1. CrossRef

Characteristics of L1₀ Ordered Fe₅₀Pt₅₀ Nanoparticles Synthesized by Chemical Vapor Condensation Process: Gyeong-Mo Lee, Ji-Hun Yu, Dong-Won Lee, Byung-Kee Kim, Hyeok-Don Kim, Tae-Suk Jang; J Korean Powder Metall Inst. 2007;14(5):281-286.; DOI: https://doi.org/10.4150/KPMI.2007.14.5.281

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Abstract PDF: Ordered L1_0 to FePt nanoparticles are strong candidates for high density magnetic data storage media because the L1_0 phase FePt has a very high magnetocrystalline anisotropy (K_usim6.6-10times107erg/cm3), high coercivity and chemical stability. In this study, the ordered L1_0 FePt nanoparticles were successfully fabricated by chemical vapor condensation process without a post-annealing process which causes severe particle growth and agglomeration. The Fe_50Pt_50 nanopowder was obtained when the mixing ratio of Fe(acac) and Pt(arac) was 2.5 : 1. And the synthesized FePt nanoparticles were very fine and spherical shape with a narrow size distribution. The average particle size of the powder tended to increase from 5 nm to 10 nm with increasing reaction temperature from 800°C to 1000°C. Characterisitcs of FePt nanopowder were investigated in terms of process parameters and microstructures.

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