Structural and magnetic properties of the as - cast Nd10Fe83Zr1B6 ribbons, studied by X-ray diffraction and Mössbauer spectroscopy

• Autorzy: Ceglarek A. , Płusa D. , Pawlik P. , Gębara P.
• Konferencja: Proceedings of the 9th All - Polish Seminar on Mössbauer Spectroscopy OSSM'2012, 10-13 June 2012, Lublin - Kazimierz Dolny, Poland
• Języki publikacji: EN

Abstrakty

EN

The Nd10Fe83Zr1B6 alloy ribbons, prepared by melt-spinning technique, have been investigated by X-ray diffraction (XRD) and Mossbauer spectroscopy. Magnetic properties were studied by Faraday balance and vibrating sample magnetometry (VSM). The ribbon samples were produced at various surface velocities of the copper wheel from 10 m/s to 20 m/s. The XRD and Mossbauer spectra analysis have shown that the ribbons consist of the soft magnetic alfa-Fe, hard magnetic Nd2Fe14B and disordered phases. The results showed that a uniform Nd2Fe14B/alfa-Fe nanocomposite structure with fine alfa-Fe grains can be obtained at an optimum velocity of the cooper roll of 20 m/s. The samples produced in these conditions had the best magnetic properties (mi0HC= 0.84 T, mi0MR = 1.05 T, mi0MS = 1.36 T, (BH)max = 160 kJ/m3) with strong exchange coupling between the hard magnetic Nd2Fe14B and soft magnetic mi-Fe phases. The amorphous phase existing between grains causes an increase in the remanence and remanence ratio.

Słowa kluczowe

EN

hard magnetic magnets; melt-spinning technique; Mössbauer spectroscopy; nanocomposites

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 1
• Strony: 105--108
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Ceglarek A.

autor

Płusa D.

autor

Pawlik P.

autor

Gębara P.

• Technical University of Częstochowa, Institute of Physics, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland, Tel./Fax: [phone],

Bibliografia

• 1. Bauer J, Seeger M, Zern A, Kronmüller H (1996) Nanocrystalline FeNdB permanent magnets with enhanced remanence. J Appl Phys 80:1667–1673
• 2. Betancourt RJI (2002) Nanocrystalline hard magnetic alloys. Rev Mex Fis 48:283–289
• 3. Croat JJ, Herbst JF, Lee RW, Pinkerton FE (1984) Pr-Fe and Nd-Fe-based materials: A new class of high-performance permanent magnets. J Appl Phys 55:2078 (5 pp)
• 4. Hirosawa S, Shigemoto Y, Miyoshi T, Kanekiyo H (2003) Direct formation of Fe3B/Nd2Fe14B nanocomposite permanent magnets in rapid solidification. Scripta Mater 48:839–844
• 5. Kobayashi T, Yamasaki M, Hamano M (2000) Mössbauer study on intergranular phases in the bcc-Fe/NdFeB nanocomposite alloys. J Appl Phys 87:6579–6581
• 6. Li S, Gu B, Bi H et al. (2002) Role of amorphous grain boundaries in nanocomposite NdFeB permanent magnets. J Appl Phys 92:7514–7518
• 7. Effects of Nd and B contents Wang C, Yan M, Li Q (2008) on the thermal stability of nanocomposite (Nd,Zr)2Fe14B/alfa-Fe magnets. Mat Sci Eng B 150:77–82
• 8. Wu YQ, Ping DH, Hono K, Hamano M, Inoue A (2000)Microstructural characterization of an alpha-Fe/Nd2 Fe14B nanocomposite magnet with a remaining amorphous phase. J Appl Phys 87:8658–8665
• 9. Wu YQ, Ping DH, Xiong XY, Hono K (2002) Magnetic properties and microstructures of α-Fe/Nd2Fe14B nanocomposite microalloyed with Zr. J Appl Phys91:8174–8176
• 10. Xiaoqian B, Jie Z, Wei L, Xuexu G, Shouzeng Z (2009) Influence of zirconium addition on microstructure, magnetic properties and thermal stability of nanocrystalline Nd12.3Fe81.7B6.0 alloy. J Rare Earths 27:843–847
• 11. Yamasaki M, Hamano M, Kobayashi T (2002) Mössbauer study on the crystallization process of alfa-Fe/Nd2Fe14B type magnet alloy. Mater Trans 43:2885–2885