Effect of Powder Size on the Microstructure and Magnetic Properties of Nd-Fe-B Magnet Alloy

• Autorzy: Cho Ju-Young , Abbas Sardar Farhat , Choa Yong-Ho , Kim Taek-Soo

Identyfikatory

DOI

10.24425/amm.2019.127589

• Języki publikacji: EN

Abstrakty

EN

Rare earth Nd-Fe-B, a widely used magnet composition, was synthesized in a shape of powders using gas atomization, a rapid solidification based process. The microstructure and properties were investigated in accordance with solidification rate and densification. Detailed microstructural characterization was performed by using scanning electron microscope (SEM) and the structural properties were measured by using X-ray diffraction. Iron in the form of α-Fe phase was observed in powder of about 30 μm. It was expected that fraction of Nd₂ Fe₁₄ B phase increased rapidly with decrease in powder size, on the other hand that of α-Fe phase was decreased. Nd-rich phase diffused from grain boundary to particle boundary after hot deformation due to capillary action. The coercivity of the alloy decreased with increase in powder size. After hot deformation, Nd₂ Fe₁₄ B phase tend to align to c-axis.

Słowa kluczowe

EN

Nd-Fe-B; gas atomization; powder size; crystal orientation; hot deformation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 2
• Strony: 623--626
• Opis fizyczny: Bibliogr. 12 poz., fot., rys., wzory

Twórcy

autor

Cho Ju-Young

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Getbeol-Ro 12, Songdo-Dong, Incheon, 21999, Korea
• Hanyang University, Department of Material Science and Chemical Engineering, Ansan, Korea

autor

Abbas Sardar Farhat

• University of Science and Technology, Critical Materials and Semi-Conductor Packaging Engineering, Daejeon 3413, Republic of Korea

autor

Choa Yong-Ho

• Hanyang University, Department of Material Science and Chemical Engineering, Ansan, Korea

autor

Kim Taek-Soo

• Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Getbeol-Ro 12, Songdo-Dong, Incheon, 21999, Korea
• University of Science and Technology, Critical Materials and Semi-Conductor Packaging Engineering, Daejeon 3413, Republic of Korea

Bibliografia

• [1] S. G. Yoon, Transfer. Super Strong Permanent Magnets 1, UUP, Ulsan (2002).
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• [8] J. H. Lee, J. Y. Cho, S. W. Nam, S. F. Abbas, K. M. Lim, T. S. Kim, Science of Advanced Materials 9, 1859 (2017).
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).