Preparation and Crystallization of Nd2Fe14B/α-Fe Permanent Magnetic Nanomaterial by Mechanical Milling

Yong Ping Jin; Ming Hu; Jin Gao

doi:10.4028/www.scientific.net/AMR.486.70

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 486Preparation and Crystallization of Nd2Fe14B/α-Fe...

Preparation and Crystallization of Nd₂Fe₁₄B/α-Fe Permanent Magnetic Nanomaterial by Mechanical Milling

Abstract:

Nanocomposite Nd₂Fe₁₄B/α-Fe magnetic material had been prepared by mechanical milling Nd₈Fe₈₆B₆as-cast alloy in Argon and subsequent crystallization. Effect of mechanical milling and crystallization technique on its structure had been investigated by means of X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM) and Differential Scanning Caborimetry (DSC), etc. The crystallization behavior of amorphous Nd₈Fe₈₆B₆powders had also been studied. The results showed that Nd₂Fe₁₄B grain refined quickly and the grain size of α-Fe decreased while extending milling time. After milling for 25h, grain size of α-Fe reached a constant (about 7nm). Higher temperature of complete crystallization as well as finer and more homogeneous grains resulted from longer milling time. During the process of crystallization, the total amorphous phase crystallized into four phases firstly, i.e., Nd_4.4Fe_77.8B_17.8, Nd_1.1Fe₄B₄, Nd₂Fe₁₄B and α-Fe. At higher temperature, final mixture was consisted of Nd₂Fe₁₄B, α-Fe and a few undecomposed Nd_1.1Fe₄B₄ phase.

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Advanced Materials Research (Volume 486)

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70-74

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https://doi.org/10.4028/www.scientific.net/AMR.486.70

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March 2012

Authors:

Yong Ping Jin, Ming Hu, Jin Gao

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Crystallization Treatment, Mechanical Milling, Permanent Magnetic Nanomaterial

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References

[1] R. Coehoorn, D.B. de Mooij, J.P.W.B. Duchateau, et al: J. De Phys. Vol. 49 (1988), p.669.

Google Scholar

[2] T. Schrelfl, H. Kronmuller and J. Fidler: J. Magn. Magn. Mater. 127 (1993), p.273.

Google Scholar

[3] T. Schrelfl, R. Fischer, J. Fidler, et al: J. Appl. Phys. 76 (1994), p.7053.

Google Scholar

[4] H. Fukunaga, H. Inoue: J. Appl. Phys. 31 (1992), p.1347.

Google Scholar

[5] E.A. Tereshina and I.S. Tereshina: Phys. Solid State Vol. 48 (2006), p.509.

Google Scholar

[6] I.S. Tereshina and N.V. Kudrevatykh: Bull. Russ. Acad. Sci.: Phys. Vol. 74 (2010), p.1395.

Google Scholar

[7] X.H. Liu, Y.J. Xue, S.Z. Zhou, et al: Funct. Mater. Vol. 34 (2003), p.390.

Google Scholar

[8] V.K. Ravindran and J.E. Shield: Metall. Mater. Trans. A Vol. 38 (2007), p.732.

Google Scholar

[9] E.C. Kim, S.J. Kim, J.K. Baek, et al: Hyperfine Interact. Vol. 183 (2008), p.55.

Google Scholar

[10] Yu.D. Yagodkin: Steel in Translation Vol. 37 (2007), p.14.

Google Scholar

[11] Yu. D. Yagodkin and Yu.V. Lyubina: Met. Sci. Heat Treat. Vol. 51 (2009), p.25.

Google Scholar

[12] S. Manjura Hoque, M.A. Hakim, F.A. Khan, et al: J. Mater. Sci. Vol. 42 (2007), p.9415.

Google Scholar

[13] Z.A. Chen, Y.L. Sui and Z.M. Guo: Rare Metals Vol. 29 (2010), p.265.

Google Scholar

[14] A.G. Popov, V.V. Serikov and N.M. Kleinerman: Phys. Met. Metall. Vol. 109 (2010), p.505.

Google Scholar

[15] S.J. He: Amorphous Materials and Their Applications (China Machine Press, Beijing 1987).

Google Scholar