The Effect of Powder Particle Size on the Structural and Magnetic Properties of Bonded NdFeB Magnet

Publisher: Trans Tech Publications

E-ISSN: 1662-8985|2015|1123|88-91

ISSN: 1022-6680

Source: Advanced Materials Research, Vol.2015, Iss.1123, 2015-09, pp. : 88-91

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Abstract

Commercially, NdFeB powder (type MQP-B+) with difference in particle sizes were used in this study. The powders were isotropically compressed and heat cured at 150°C for 30 minute. The samples were then magnetized and characterized by impulse magnetizer K series and permagraph MAGNET-PHYSIK Dr. Steingroever GmbH, respectively. According to the results of SEM characterization, compacted powder showed a homogeneous plate distribution. The surface morphology also indicated the presence of pores in the bonded NdFeB magnet. X-ray diffraction analysis from all samples revealed that the diffraction peaks were detected as tetragonal Nd2Fe14B-phase. There was no significant different in magnetic properties of bonded magnets with different in particle size. The optimum Br, Hcb, and (BH)max were achieved at particle size range of 150-297 mm.