The epoxy resin variation effect on microstructure and physical properties to improve bonded NdFeB flux magnetic density

8th International Conference on Physics and its Applications

Rusnaeni, N.^1 ; Sarjono, Priyo^1 ; Muljadi^1 ; Noer, Nasrudin^2

Research Center for Physics, Indonesian Institute of Sciences, Kawasan Puspiptek Serpong, Tangerang Selatan, Indonesia^1

Department of Physics, University of Sumatera Utara, Indonesia^2

关键词: Bonded NdFeB;    Energy products;    Magnetic density;    Magnetic particle;    Nd-Fe-B magnets;    Pellet samples;    SEM-EDX;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012025/pdf
DOI  :  10.1088/1742-6596/776/1/012025

来源: IOP

【 摘 要 】

NdFeB magnets have been fabricated from a mixture of powder NdFeB (MPQ-B+) and epoxy resins (ER) with a variation of 0% wt, 2% wt, 4% wt and 6% wt. The pellets samples were made by pressing 4 tons of the mixture powder at room temperature before curing at 100°C for 1 hour. The SEM-EDX results showed the microstructure with ER were evenly smeared the NdFeB magnetic particles due to higher percent C and lower transition metals value. Sample with 2% wt epoxy resin was able to achieve the highest density of 5.35 g/cm3and the highest magnetic flux of 2121 Gauss. The magnetic properties characterization using the permagraph indicates that the sample pellets with 2% wt epoxy resin has a value of remanence (Br) = 4.92 kG, coercivity (Hc) = 7.76 kOe, and energy product (Bhmax) = 4.58 MGOe. Despite low remanence value in the pellet samples, the resistance to demagnetization value was still acceptable.