journal article·2019-11

Anisotropic nanocomposite Nd-Fe-B magnets produced by hot deformation with assistance of Nd-Cu

Akihide Hosokawa, Kenta Takagi

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Abstract

Abstract Uniaxial compressive deformation at elevated temperatures was applied to various Nd-lean Nd-Fe-B nanocomposite magnets. Particularly, influences of addition of eutectic Nd-Cu alloys having low melting points on texturing were investigated. X-ray diffraction and magnetic property measurements were carried out for the deformed samples to check whether texture is induced. A series of the experiments clearly demonstrated that no texturing occurs in the case of the alloys without any Nd-Cu alloy while textured magnets are successfully obtained when Nd-Cu is added. However, the texture obtained by the current attempt was not very strong. Detailed multi-scale electron microscopy revealed that the textured region was limited to where Nd was enriched and α-Fe phases disappeared. The strategy to obtain an ideal microstructure of nanocomposite magnet is discussed.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Magnetic Properties of Alloys · Magnetic Properties and Applications · Magnetic properties of thin films

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References (42)

Show source-provided references
1. The exchange-spring magnet – a new material principle for permanent-magnets10.1109/20.102931 ↗
2. Meltspun permanent-magnet materials containing Fe3B as the main phase10.1016/0304-8853(89)90333-8 ↗
3. Giant energy product in nanostructured two-phase magnets10.1103/PhysRevB.48.15812 ↗
4. Nanocrystalline Fe-Nd-B type permanent-magnet materials with enhanced remanence10.1016/0167-577X(92)90219-A ↗
5. New nanocrystalline high-remanence Nd-Fe-B Alloys by rapid solidification10.1016/0304-8853(93)90475-H ↗
6. High-energy-product rapidly solidified Fe-Nd-B alloys with additions of Nb and Si10.1063/1.352584 ↗
7. Direct formation of Fe3B/Nd2Fe14B nanocomposite permanent magnets in rapid solidification10.1016/S1359-6462(02)00620-6 ↗
8. Exchange coupled nanocomposite hard magnetic alloys10.1179/026708309X12548155118860 ↗
9. Current status and recent topics of rare-earth permanent magnets10.1088/0022-3727/44/6/064001 ↗
10. Nd2Fe14B/FeCo anisotropic nanocomposite films with a large maximum energy product10.1002/adma.201202328 ↗
11. Development of high performance Nd-Fe-B sintered magnets
12. Sm(Co, Cu)5/Fe exchange spring multilayer films with high energy product
13. Hot-pressed neodymium-iron-boron magnets10.1063/1.95884 ↗
14. Microstructure of hot-pressed and die-upset NdFeB magnets10.1063/1.339709 ↗
15. Microstructure of hot-pressed and die-upset magnequench magnets10.1063/1.338968 ↗
16. Grain growth and alignment in hot deformed Nd-Fe-B magnets10.1063/1.340731 ↗
17. Tensile deformation behavior of Nd–Fe–B alloys10.1016/j.scriptamat.2011.07.027 ↗
18. Step model of solution-precipitation creep10.1016/0956-7151(94)90133-3 ↗
19. Hot deformation of nanocrystalline Nd-Fe-B alloys10.1109/20.619605 ↗
20. Anisotropy study of hybrid magnet consisting of Nd2Fe14B single phase and nanocomposite alloys10.1016/j.jmmm.2006.01.199 ↗
21. Magnetic and microstructural study of hybrid magnet consisting of R-rich and R-lean Nd-Fe-B alloys10.1016/j.jmmm.2006.10.1067 ↗
22. Development of crystal texture in Nd-lean amorphous Nd9Fe85B6 under hot deformation
23. Effect of Cu and Ga additions on the anisotropy of R2Fe14B/alpha-Fe nanocomposite die-upset magnets (R = Pr, Nd)10.1016/j.jmmm.2005.09.013 ↗
24. Bulk alpha-Fe/Nd2Fe14B nanocomposite magnets prepared by hot deformation of amorphous Nd10.5Fe82Cu1.5B610.1016/j.matlet.2013.06.107 ↗
25. First principles study on interfacial electronic structures in exchange-spring magnets10.1088/1742-6596/266/1/012046 ↗
26. First-principles study of interface magnetic structure in Nd2Fe14B/(Fe, Co) exchange spring magnets10.1103/PhysRevB.93.014408 ↗
27. Evaluation of interlayer exchange coupling in alpha-Fe(100)/Nd2Fe14B(001) films10.3938/jkps.63.489 ↗
28. Negative exchange coupling in Nd2Fe14B(100)/alpha-Fe interface10.1063/1.4930829 ↗
29. Severe plastic deformation of Nd-Fe-B nanocomposite magnets at room temperature10.1016/j.jmmm.2018.10.032 ↗
30. Impact of Nd-Cu diffusion on microstructure and coercivity in hot-pressed and die-upset nanocomposite magnets10.1016/j.scriptamat.2014.05.014 ↗
31. Mechanism of texture enhancement in nanocomposite magnets during process of die upsetting coupled with Nd-Cu grain boundary diffusion10.1016/j.jallcom.2014.11.100 ↗
32. Grain boundary diffusion behaviors in hot-deformed Nd2Fe14B magnets by PrNd-Cu low eutectic alloys10.1016/j.jmmm.2017.08.085 ↗
33. Microstructure analysis of nanocrystalline Fe-Nd-B ribbons with enhanced hard magnetic-properties10.1016/0304-8853(93)90476-I ↗
34. Precipitation phenomenon in stoichiometric Nd2Fe14B alloys modified with titanium and titanium with carbon10.1016/0925-8388(95)01700-3 ↗
35. Altering the cooling rate dependence of phase-formation during rapid solidification in the Nd2Fe14B system10.1016/0304-8853(94)01646-1 ↗
36. Transition metal carbide formation in the Nd2Fe14B system and potential as alloying additions10.1016/S0925-8388(96)02421-8 ↗
37. Magnetic properties and phase evolution of nanocomposite Nd10Febal.MCB10.5 (M = Ti, Nb, V, Cr and Mo) melt-spun ribbons10.1016/S0921-4526(02)01771-4 ↗
38. Structure and magnetic properties of Nd2Fe14B/FexB-type nanocomposites prepared by strip casting10.1109/TMAG.2004.834216 ↗
39. Effect of Ti and C additions on the microstructure and magnetic properties of Nd6Pr1Fe80B13 melt-spun ribbons10.1016/j.actamat.2006.06.024 ↗
40. High-coercivity nanocomposite permanent magnet based on Nd-Fe-B-Ti-C with Cr additino for high-temperature applications10.1016/j.jmmm.2006.11.127 ↗
41. Nanocomposite Nd-Fe-Ti-B magnets produced by melt spinning and flash annealing10.1016/j.jmmm.2017.05.023 ↗
42. Unusual effects of Ti and C additions on structural and magnetic properties of Nd-Fe-B nanocomposite magnets in a B-rich and Nd-poor composition range10.1016/j.jmmm.2004.03.046 ↗