Influence of Nano-Ag Addition on the Mechanical Properties of (Cu0.5Tl0.5)-1223 Superconducting Phase

Abdeen, W.; Mohammed, N. H.; Awad, R.; Mahmoud, S. A.; Hasebbo, Marwa

doi:10.1007/s10948-013-2192-6

Cited by 15 publications

(5 citation statements)

References 52 publications

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“…The H V -F curve behavior shows that the H V decreases non-linearly as the applied load increases up to 3 N, beyond which the curves tend to attain saturation (nearly plateau) region. This non-linear behavior is also observed for (Bi,Pb)-2223 phase [12][13][14][15][30][31][32][33][34] and it is known as indentation size effect (ISE). The ISE behavior can be explained qualitatively on the basis of penetration depth of the indenter.…”

Section: Characterization and Investigationmentioning

confidence: 89%

“…where  is the surface energy, and the change in the α value is associated with the energy dispersion of the surface cracks [31];  is a parameter used to calculate the real microhardness. According to Eq.…”

Section: 4 Proportional Sample Resistance Modelmentioning

confidence: 99%

“…The mechanical properties of small size samples can be measured using Vickers indentation method [28][29][30][31]. The effect of chemical substitution/addition on Vickers microhardness for (Bi,Pb)-2223 phase was studied by many groups [12][13][14][15][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

et al. 2016

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Abstract:The effect of the partial substitution of Ca 2+ by Ho 3+ ions on the electrical and mechanical properties of the superconducting phase (Bi,Pb)-2223 was studied. Superconducting samples of the type (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ were prepared by solid-state reaction technique under ambient pressure, and characterized by means of X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The superconducting transition temperature T c and pseudogap temperature T * were estimated from electrical resistivity measurements, while the critical current density J c was determined from I-V curves. The electrical resistivity data were discussed according to bipolaron model in the absence of thermally excited individual polarons. The sample with x = 0.025 showed the highest phase volume fraction, T c , and J c . Room temperature Vickers microhardness measurements were carried out at different applied loads (0.25-5 N) in order to investigate the performance of the mechanical properties of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ phase. It was found that all the samples exhibit normal indentation size effect (ISE). The Vickers microhardness number H V increased as x increased from 0 to 0.025. The experimental results were discussed in view of Meyer's law, Hays-Kendall (HK) approach, elastic/plastic deformation (EPD) model, and proportional specimen resistance (PSR) model. The load independent (true) microhardness of (Bi 1.8 Pb 0.4 )Sr 2 Ca 2.1−x Ho x Cu 3.1 O 10+δ superconducting samples showed identical behavior to that of the PSR model.

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Section: Characterization and Investigationmentioning

confidence: 89%

Section: 4 Proportional Sample Resistance Modelmentioning

confidence: 99%

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Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

et al. 2016

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“…For instance, Abdeen et al [21] showed that the addition of nano-silver to the superconducting phase improved the volume fraction, superconducting, and mechanical properties of the material. In addition, the addition of silver results in the growth of grains leading to the reduction in grain boundaries and porosity and the improvement of intergranular links [22,23]. For example, D. Sýkorová et al studied the effect of the addition of different amounts of silver (5, 10, and 15 wt.%) on the performance of Bi-based superconductors, and they demonstrated that 15 wt.% of silver addition is the optimal amount for the formation of a low porous and high dense sample with good superconducting properties [24].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Radiation-Protective Properties of Bi (Pb)–Sr–Ca–Cu–O Ceramic Prepared at Different Temperatures with Silver Inclusion

et al. 2022

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The influences of the sintering process and AgNO3 addition on the phase formation and radiation shielding characteristics of Bi1.6Pb0.4Sr2Ca2Cu3O10 were studied. Three ceramics (code: C0, C1, and C2) were prepared as follows: C0 was obtained after calcination and only one sintering step, C1 was obtained after calcination and two sintering cycles, and C2 was prepared after the addition of AgNO3 at the beginning of the final sintering stage. C2 displayed the maximum volume fraction of the Bi-2223 phase (76.4 vol%), the greatest crystallite size, and high density. The linear mass attenuation coefficient (µ) has been simulated using the Monte Carlo simulation. The µ values are high at 15 keV (257.2 cm−1 for C0, 417.57 cm−1 for C1, and 421.16 cm−1 for C2), and these values dropped and became 72.58, 117.83 and 133.19 cm−1 at 30 keV. The µ value for the ceramics after sintering is much higher than the ceramic before sintering. In addition, the µ value for C2 is higher than that of C1, suggesting that the AgNO3 improves the radiation attenuation performance for the fabricated ceramics. It was demonstrated that the sintering and AgNO3 addition have a considerable influence on the ceramic thickness required to attenuate the radiation.

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“…A further increase of SiC and Ag nano-powder above 16 wt% decreases the superconductivity of MgB 2 [28]. The improvement of mechanical properties of (Bi Pb)-Sr-CaCu-O superconducting matrix was also observed after nanoAg particles addition that may be due to cementing effects of these additives at the grains boundaries [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and superconductivity of (Ag) x /CuTl-1223 composites

Jabbar

Qasim

Mumtaz

et al. 2015

Progress in Natural Science: Materials International

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Series of (Ag) x /(Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10-δ ) {(Ag) x /CuTl-1223} nano-superconductor composites were synthesized with different concentrations (i.e. x ¼0 $ 4.0 wt%) of silver (Ag) nanoparticles. Low anisotropic CuTl-1223 superconducting matrix was prepared by solid-state reaction and Ag nanoparticles were prepared by a sol-gel method separately. The required (Ag) x /CuTl-1223 composition was obtained by the inclusion of Ag nanoparticles in CuTl-1223 superconducting matrix. Structural, morphological, compositional and superconducting transport properties of these composites were investigated in detail by x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-rays (EDX) spectroscopy and four-point probe electrical resistivity (ρ) measurements. The inclusion of Ag nanoparticles enhanced the superconducting properties without affecting the tetragonal structure of the host CuTl-1223 matrix. The improvement in superconducting properties of (Ag) x /CuTl-1223 composites is most likely due to enhanced inter-grains coupling and increased superconducting volume fraction after the addition of metallic Ag nanoparticles at the inter-crystallite sites in the samples. The presence of Ag nanoparticles at the grain-boundaries may increase the number of flux pinning centers, which were present in the form of weak-links in the pure CuTl-1223 superconducting matrix.

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Influence of Nano-Ag Addition on the Mechanical Properties of (Cu0.5Tl0.5)-1223 Superconducting Phase

Cited by 15 publications

References 52 publications

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

Electrical and mechanical properties of (Bi,Pb)-2223 substituted by holmium

Evaluation of the Radiation-Protective Properties of Bi (Pb)–Sr–Ca–Cu–O Ceramic Prepared at Different Temperatures with Silver Inclusion

Synthesis and superconductivity of (Ag) x /CuTl-1223 composites

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