Investigation of Material Removal Mechanism in EDM of Sintered NdFeB Permanent Magnet


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Sintered NdFeB permanent magnet is widely used in many applications because of its excellent magnet property. However the report of EDM research on NdFeB magnet is not available. This paper presents a detailed investigation of the material removal mechanisms of sintered NdFeB magnet through analysis of the machining debris and the surface SEM quality. It is included three types of machining mechanisms: melting and evaporating, thermal cracking, spalling or whole grain removal.



Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang




L. Li et al., "Investigation of Material Removal Mechanism in EDM of Sintered NdFeB Permanent Magnet", Key Engineering Materials, Vols. 334-335, pp. 937-940, 2007

Online since:

March 2007




[1] M. Sugawa, S. Fujimura, N. Togawa, H. Yamamoto and Y. Matsuura: J. Appl. Phys. 55 (1983), p. (2083).

[2] S.M. Tamborim Takeuchi, D.S. Azambuja, A.M. Saliba-Silva and I. Costa: Surface and Coating Technology 200 (2006), p.6826.


[3] G. Bai, R.W. Gao, Y. Sun, G.B. Han and B. Wang: submitted to Journal of Magnetism and Magnetic Materials (2006).

[4] J.H. Zhang, T.C. Lee and W.S. LAu: Journal of Material Processing Technology 63 (1997), p.908.

[5] B. Lauwers, J.P. Kruth, W. Liu, W. Eeraers, B. Schacht and P. Bleys: Journal of Material Processing Technology 149 (2004), p.347. Fig. 3 Model of whole grain removal Fig. 4 Microstructure of machined surface.