Abstract
Superconducting samples of type (Cu0.5Tl0.5)-1223 added with nano-Fe2O3 (x=0.0, 0.1, 0.2, 0.4, 0.6 and 1.0 wt.%) were prepared by solid-state reaction technique. The prepared samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for phase analysis and microstructure examination. The elemental content of the prepared samples was determined using particle induced X-ray emission (PIXE), whereas the Oxygen-content of these samples was obtained using non Rutherford backscattering spectroscopy at 3 MeV proton beam. It was found that the Oxygen-content of (Cu0.5Tl0.5)-1223 phase was not affected with the addition of nano-Fe2O3. The electrical resistivity measurements showed that the superconducting transition temperature (T c ) increases up to x=0.2 wt.%, followed by a systematic decrease for x>0.2 wt.%. In addition, room temperature Vickers microhardness (H v ) measurements were carried out at different applied loads (0.49–2.94 N) to study the performance of the mechanical properties of samples. The experimental results of H v were analyzed using different models such as elastic, energy dissipation, energy balance and modified energy balance models. It has been found that the energy dissipation model is in a good agreement with the microhardness data.
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Acknowledgements
This work was performed in the superconductivity and metallic-glass lab, Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt. The authors are grateful for the support of Accelerator Laboratory, Lebanese Atomic Energy Commission, National Council for Scientific Research, Beirut, Lebanon for PIXE and RBS measurements.
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Mohammed, N.H., Abou-Aly, A.I., Awad, R. et al. Mechanical and Electrical Properties of (Cu0.5Tl0.5)-1223 Phase Added with Nano-Fe2O3 . J Low Temp Phys 172, 234–255 (2013). https://doi.org/10.1007/s10909-013-0867-9
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DOI: https://doi.org/10.1007/s10909-013-0867-9
Keywords
- (Cu0.5Tl0.5)-1223
- Nano-Fe2O3
- PIXE and RBS techniques
- Vickers microhardness