Investigation of effect of annealing temperature on mechanical properties of MgB2

“…show an apparent increase with increasing x up to 0.75 wt.%. Knowing that the elastic modulus is inversely proportional to the ductility, thus, higher nanoparticle concentration's samples have a higher ductility Terzioglu et al (Terzioglu, Varilci, & Belenli, 2009) studied the effect of annealing temperature on mechanical properties of MgB 2 . They found that mechanical of the samples are improved with increasing annealing temperature from 650 to 850 o C and they worsen at 950 o C. Table 4.…”

Section: By Plottingmentioning

confidence: 99%

Effect of BaFe12O19 Nanoparticles Addition on (Bi,Pb)-2223 Superconducting Phase

Habanjar¹,

Hassan²,

Awad³

2019

MAS

View full text Add to dashboard Cite

The aim of this work is to investigate the effect of BaFe12O19 nanoparticles on the microstructure, phase formation and mechanical properties of (Bi,Pb)-2223 superconducting phase. Co-precipitation and solid-state reaction techniques were used to synthesize BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 superconducting samples with , respectively. BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 structures were performed using X-ray diffraction. The morphology of BaFe12O19 nanoparticles and (BaFe12O19)x(Bi,Pb)-2223 were observed by means of transmission electron microscope (TEM) and scanning electron microscope (SEM), respectively. The experimental results reveal the composition of Bi-2223 phase and traces of Bi-2212 as a secondary phase when compared to the undadded sample. Lattice parameters are not altered with BaFe12O19 addition which indicate that nanoparticles do not enter the host crystal of (Bi,Pb)-2223. Vickers microhardness Hv is measured as function of indentation load and time. It was found that microhardness has a non-linear trend with applied load and time. The experimental results were analyzed using different models. The analysis revealed that the HK model was more suitable than the other approaches in estimating the load independent hardness of the samples.

show abstract

“…Figure 1 shows the dependence of T c versus n. In this family of materials, the transition temperature sequentially increases with increasing number n of CuO 2 planes up to n = 3, and then it is observed to decrease with further increase of n. Each phase has a different transition temperature to the superconducting state: for n = 1 (1201), T C = 97 K; n = 2 (1212), T C = 127 K; n = 3 (1223), T C = 135 K; n = 4 (1224), T C = 126 K; n = 5 (1245), T C = 110 K; and n = 6 (1256), T C = 107 K. Previous studies on high T c superconductor have shown that the chemical doping or substation, preparation conditions and hole concentrations play very important roles in high T c and conventional superconductors. 4,5 To improve critical transition temperature of the (Hg,Tl)-2223 compound, samples were prepared with different conditions of annealing at different temperatures. It is very important to investigate impact of varying annealing conditions on the oxygen content of the (Hg,Tl)-2223 samples.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preparation and Annealing Temperature on the Properties of (Hg,Tl)-2223 Superconductor

Alnakhlani¹,

Hassan²,

Ahlam³

et al. 2019

JPS

View full text Add to dashboard Cite

Samples of superconducting compounds were prepared by a solid-state reaction technique in a sealed quartz tube under normal pressure. The impact of the compound on the electrical properties has been studied using the electrical resistance measurements of the samples as a function of temperature. The obtained results appear that an enhancement in the phase formation, and the superconducting transition temperature T c were improved. It may be due to the decreasing of the magnetic impurities or the delocalisation of carriers which resulted in the enhancement of the density of mobile carriers in the conducting CuO 2 planes.

show abstract

Investigation of effect of annealing temperature on mechanical properties of MgB2

Cited by 34 publications

References 39 publications

Micro-indentation study of Mg-addition MgB2 superconducting wires

Micro-indentation study of Mg-addition MgB2 superconducting wires

Effect of BaFe12O19 Nanoparticles Addition on (Bi,Pb)-2223 Superconducting Phase

Effect of Preparation and Annealing Temperature on the Properties of (Hg,Tl)-2223 Superconductor

Contact Info

Product

Resources

About