Sintering Behavior and Phase Analysis of (Nd, Dy)-Fe-B Powder

Se-Hoon Kim; Jin-Woo Kim; Young-Do Kim

doi:10.4150/KPMI.2010.17.2.154

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(Nd, Dy)-Fe-B 분말의 소결특성 및 상변화 연구: 김세훈, 김진우, 김영도
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):154-159
DOI: https://doi.org/10.4150/KPMI.2010.17.2.154

¹한양대학교 신소재공학과
²한양대학교 신소재공학과
³한양대학교 신소재공학과
¹Department of Materials Science and Engineering, Hanyang University
²Department of Materials Science and Engineering, Hanyang University
³Department of Materials Science and Engineering, Hanyang University

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Abstract

In this study, the sintering behavior of (Nd, Dy)-Fe-B powder which fabricated by strip-casting was investigated with various sintering temperatures and holding times. The relative density over 99% could be obtained by both sintering at 1070°C for 1h and sintering at 970°C for 20h. The grain growth was observed in sintered specimen at 1050°C compared to one at 970°C. The isothermal sintering process below 1000°C led to suppress grain growth showing the improved magnetic properties. The phase transformation of Nd-rich was confirmed by X-ray diffraction pattern.

Keywords: Nd-Fe-B magnets;Isothermal sintering;Non-isothermal sintering;Phase transformation;

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