caa a22 4500 445382783 CHVBK 20180317143022.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10948-010-0853-2 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0853-2 Effect of Nano-Oxides Addition on the Mechanical Properties of(Cu0.5Tl0.5)-1223 Phase [Elektronische Daten] [N. Mohammed, A. Abou-Aly, I. Ibrahim, R. Awad, M. Rekaby] In this study, superconducting samples of type Cu0.5Tl0.5Ba2Ca2Cu3O10−δ ,(Cu0.5Tl0.5)-1223, added by SnO2 and In2O3 in nano-scale were prepared by a solid-state reaction technique. The concentrations of both SnO2 and In2O3 were varied from 0.0 to 1.0 wt.% of the total sample's mass. The prepared samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for phase analysis and microstructure examination, respectively. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T c0). An increase in T c is observed up to x=0.6wt.% for (SnO2) x Cu0.5Tl0.5Ba2Ca2Cu3O10−δ , followed by a systematic decrease with increasing nano-SnO2 addition for x>0.6wt.%. While, for (In2O3) x Cu0.5Tl0.5Ba2Ca2Cu3O10−δ the T c is slightly changed withx. Room temperature Vickers microhardness measurements were carried out at different applied loads (0.49-2.94N) for the study of the mechanical performance of the prepared samples and examination of the effect of different nano-oxides addition on the microhardness of (Cu0.5Tl0.5)-1223 phase. Furthermore, the true microhardness values (H o), for both additions, were evaluated through different models and their results were compared with those estimated from the experimental results in the plateau region. Also, some important mechanical parameters, such as Young's modulus(E), yield strength(Y), fracture toughness (K) and brittleness index(B), were calculated for both additions. The results clarified that these parameters are strongly dependent on both the applied loads and the nano-oxides addition. Springer Science+Business Media, LLC, 2010 High-temperature superconductors nationallicence X-ray diffraction nationallicence Vickers microhardness nationallicence Elastic modulus nationallicence Mohammed N. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut Abou-Aly A. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut Ibrahim I. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut Awad R. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut Rekaby M. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1463-1472 1557-1939 24:5<1463 2011 24 10948 https://doi.org/10.1007/s10948-010-0853-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0853-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohammed N. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut NATIONALLICENCE 700 1- Abou-Aly A. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut NATIONALLICENCE 700 1- Ibrahim I. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut NATIONALLICENCE 700 1- Awad R. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut NATIONALLICENCE 700 1- Rekaby M. Physics Department, Faculty of Science, Alexandria University, Moharam Bek, 21511, Alexandria, Egypt aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1463-1472 1557-1939 24:5<1463 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer