Armenian Journal of Physics

Sintering Effects on Structural and Magnetic Behaviours of NdFeB Magnets

Shah, Ishfaq Ahmad and Abbas, Tahir and Ullah, Zaka and Hassan, Najam ul and Rauf, Abdur and Ullah, Kaleem and Naseem, Shahzad (2015) Sintering Effects on Structural and Magnetic Behaviours of NdFeB Magnets. Armenian Journal of Physics, 8 (4). pp. 185-190. ISSN 1829-1171

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Abstract

Hard magnetic material ‘Nd2Fe14B1’ was synthesized via powder metallurgy technique and studied for its structural and magnetic properties. The prepared sample was sintered at different temperatures and characterized by XRD, Optical Microscope and vibrating sample magnetometer (VSM). The crystal structure, phase composition and crystallite size were determined with the help of data obtained from XRD. The tetragonal crystal structure of Nd2Fe14B1 was confirmed with lattice parameters ‘a’ = 8.795 Å and ‘c’ = 12.225 Å. The crystallite size of the samples was decreased from 58.3 nm to 43.7 nm with increase in sintering temperature from 700°C to 720°C. The micro structural observations showed that the grains were smoothly and uniformly distributed, resulting in an enhancement of valuable mechanical properties of the materials. Saturation magnetization (Ms) and coercivity (Hc) of Nd2Fe14B1 were increased with increase in sintering temperature, due to decrease in crystallite size, making the materials more suitable candidate for various industrial uses including in voice coil motors and electric and hybrid electric vehicles.

Item Type:Article
Uncontrolled Keywords:Nd2Fe14B1 magnets, powder metallurgy technique, sintering effect, sturctural and magnetic proporties
Subjects:Physics > 85.Electronic and magnetic devices; microelectronics
ID Code:750
Deposited By:Mr ZAKA ULLAH
Deposited On:06 Dec 2015 09:22
Last Modified:20 Dec 2015 07:31

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