Phase formation and microstructure of gamma irradiated Bi-2223 Superconductor

International Nuclear Science, Technology and Engineering Conference 2017

原子能学

Mohiju, Zaahidah 'Atiqah^1 ; Adnan, Natasha Alieya^1 ; Hamid, Nasri A.^1 ; Abdullah, Yusof^2

Nuclear Energy Center, College of Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Selangor Kajang

43000, Malaysia^1

Materials Technology Group, Industrial Technology Division, Malaysian Nuclear Agency, Bangi, Selangor Kajang

43000, Malaysia^2

关键词: Bi-2223 superconductors;    Gamma irradiation;    Grain microstructure;    Hydraulic press machines;    Irradiated samples;    Solid state reaction method;    Structure characterization;    Superconducting phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/298/1/012021/pdf
DOI  :  10.1088/1757-899X/298/1/012021

来源: IOP

【 摘 要 】

The Bi-2223 superconductor has been synthesized using the conventional solid state reaction method. The effect of gamma irradiation on phase formation and microstructure of high-temperature Bi-2223 superconductor ceramic was investigated. The bulk samples sample were palletized with 7 tons pressure of hydraulic press machine and sintered at 840°C for 48 hours. The gamma irradiation was performed at the Nuclear Malaysian Agency with dose of 50 kGray at room temperature. Structure characterization using X-ray diffraction (XRD) showed that the patterns for all the samples demonstrate well-defined peaks all of which could be indexed on the basis of a Bi-2223 phase structure. However, for irradiated sample, it showed reduction in the peak intensity indicating a decrease in the content of the Bi-2223 superconducting phase. The effect of gamma (γ) irradiation on surface morphology and its composites has also been investigated by scanning electron microscope (SEM) and the micrograph shows that the grains are distributed randomly with poorly connected inter and intra-grain microstructure. This shows that the morphology of the Bi-2223 superconductor is very sensitive to gamma irradiation. The effect on the phase formation and microstructure of non-irradiated and gamma irradiated of Bi-2223 superconductor is compared and evaluated.