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

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 B_r, H_cb, and (BH)_max were achieved at particle size range of 150-297 mm.

• Periodical: Advanced Materials Research (Volume 1123)
• Pages: 88-91
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1123.88
• Online since: August 2015
• Authors: Didik Aryanto*, Zailani Ray, Toto Sudiro, Agus Sukarto Wismogroho, Nanang Sudrajat
• Keywords: Magnetic Property, NdFeB, Particle Size, Structure

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