The Effect of Nd Content Variation on Crystal Structure and Microstructure to Improve Magnetic Properties Performance

2nd Materials Research Society of Indonesia Meeting

Rusnaeni, Nenen^1 ; Sarjono, Priyo^1 ; Taufik^2 ; Hanifah^2 ; Muljadi^1

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

Department of Physics, University of Sumatera Utara, Kampus USU, Jalan Bioteknologi Medan

20155, Indonesia^2

关键词: Content variation;    Crystal grain size;    Energy dispersive x-ray;    Magnet powders;    Phase analysis;    Potential values;    Structure and microstructures;    Vibrating sample magnetometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/214/1/012008/pdf
DOI  :  10.1088/1757-899X/214/1/012008

来源: IOP

【 摘 要 】

Nd2Fe14B magnet powder has been fabricated by mixing Fe, B, and Nd powder based on their stoichiometric proportion at 650°C for 2 hours. Heat treatment series were applied at 720°C for one hour and continued with annealing at 100°C for 4 hours on different Nd stoichiometric variations; 26.6 %wt, 32.6 %wt, and 40.6 %wt. The results obtained from the X-ray Diffraction (XRD) phase analysis of Nd-rich Nd-Fe-B alloy suggested that the alloy has monophasic composition with hard magnetic Nd2Fe14B phase as a composition. The mean of the crystal grain size was determined using XRD analysis, while the microstructure and composition of the alloys were analyzed using the Scanning Electron Microscope - Energy Dispersive X-ray (SEM-EDX). The magnetic properties characterization were determined using the Vibrating Sample Magnetometer (VSM), which indicates that the sample with 40.6 %wt Nd was able to achieve the highest remanence of 446.50 G and BHmax of 17.83 kGOe. Despite the high remanence result, the coercivity and BHmax value of the third sample was still lower than the commercial's but has adequate potential value.