Research on the Molding Technology of Bonded NdFeB Magnets

Abstract:

For the composite powders with different NdFeB powder content , the effects of processing parameters including injection temperature, injection pressure, holding pressure and injection velocity on the sizes and properties of injection molded bonded NdFeB magnet were investigated, and the reasons of effects were also analyzed. The results show that changes in injection parameters can influence the size, density, mechanical properties and magnetic properties of bonded NdFeB magnets, and has strong influence regularity. The injection temperature and injection pressure have the greatest impact on the performance. On the basis of research, the injection molding bonded NdFeB magnet with high performance is obtained with magnetic properties Br=0.539T, Hcb=345.37kA/m, Hci=681.02kA/m, (BH)max=47.37kJ/m3 and density 5.07g/cm3 respectively.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 1815-1818
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.1815
• Online since: November 2012
• Authors: Wan Zhong Qin, Jie He, Ling Yi Yao
• Keywords: Bonded NdFeB Magnet, Injection Molding, Property, Technology

References

[1] B. M. Ma, J.W. Herchenroeder, B. Smith: Journal of Magnetism and Magnetic Materials, Vol. 239(2002), p.421.

[2] Z. Jie: Chinese Rare Earths, Vol. 22(2001) No.6, p.60.

[3] B.H. Duan, X.H. Qu, Y.P. Li: Journal of Magnetic Materials and Devices, Vol. 34(2003) No.4, p.36.

[4] T.J. Lv, H.Y. Guan, Y. Li: China Plastics, Vol. 17(2003) No.9, p.49.

[5] Garrell M. G., Albert J. S.: Journal of Magnetism and Magnetic Materials, Vol. 257(2003) , p.32.

[6] J. Xie: Journal of Mould Industry, Vol. 292(2005) No.5, p.35.

[7] Y.K. Chen, J.W. Ye: Powder Metallurgy Technology, Vol. 24(2006) No.4, p.263.