Effect of Deformation Temperature on the Magnetic Properties of PrFeB Alloy Fabricated by Gas Atomization

• Autorzy: Cho Ju-Young , Song Myung-Suk , Choa Yong-Ho , Kim Taek-Soo

Identyfikatory

DOI

10.24425/amm.2021.136404

• Języki publikacji: EN

Abstrakty

EN

To form the fine micro-structures, the Pr₁₇Fe₇₈B₅ magnet powders were produced in the optimized gas atomization conditions and it was investigated that the formation of the textures, microstructures, and the changes in the magnetic properties with increasing the deformation temperatures and rolling directions. Due to the rapid cooling system than the casting process, the homogenous microstructures were composed of the Pr-rich and Pr₂Fe₁₄B without any oxides and α-Fe and enables grain refinement. The pore ratios were 2.87, 1.42, and 0.22% at the deformation temperatures of 600, 700, 800°C, respectively in the rolled samples to align the c-axis which is the magnetic easy axis. Because Pr-rich phase cannot flow into the pore with a liquid state at low temperature, the improvement of pore densification was gradually observed with increasing deformation temperature. To confirm the magnetic decoupling effects of Pr₂Fe₁₄B phases by Pr-rich phases, the magnetic properties were investigated in rolled samples produced at the deformation temperature of 800°C. Although the remanent field is slightly decreased by 30%, the coercivity fields increased by about 2 times than that previous casted ingot. It is suggested that the gas atomization method can be suitable for fabricating grain refined and pure PrFeB magnets, and the plastic deformation conditions and rolling directions are a critical role to manipulate microstructure and magnetic properties.

Słowa kluczowe

EN

PrFeB alloy; gas atomization; plastic deformation; rolling; REFeB magnet

• 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: 2021
• Tom: Vol. 66, iss. 4
• Strony: 955--958
• Opis fizyczny: Bibliogr. 13 poz., fot., rys., tab.

Twórcy

autor

Cho Ju-Young

• Research Institute of Advanc ed Manufacturing Technology, Korea Institute of Industrial Technology, 156 Gaetbeol-ro (Songdo-dong), Yeonsu-gu, Incheon 21999, Korea
• Hanyang University, Department of Material Science and Chemical Engineering, Ansan 15588, Korea

• https://orcid.org/0000-0002-0473-6731

autor

Song Myung-Suk

• Research Institute of Advanc ed Manufacturing Technology, Korea Institute of Industrial Technology, 156 Gaetbeol-ro (Songdo-dong), Yeonsu-gu, Incheon 21999, Korea

• https://orcid.org/0000-0003-3937-3245

autor

Choa Yong-Ho

• Hanyang University, Department of Material Science and Chemical Engineering, Ansan 15588, Korea

• https://orcid.org/0000-0002-1254-3593

autor

Kim Taek-Soo

• Research Institute of Advanc ed Manufacturing Technology, Korea Institute of Industrial Technology, 156 Gaetbeol-ro (Songdo-dong), Yeonsu-gu, Incheon 21999, Korea
• University of Science and Technology,Critical Materials and Semi-Conductor Packaging Engineering, Daejeon 3413, Republic of Korea

• https://orcid.org/0000-0002-0258-0526

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).