Significant change in micro mechanical, structural and electrical properties of MgB2 superconducting ceramics depending on argon ambient pressure and annealing duration

Reinforcing Increase of ΔTc in MgB2 Smart Meta-Superconductors by Adjusting the Concentration of Inhomogeneous Phases

“…In this work, the ΔT c is improved by increasing the optimal doping concentration of inhomogeneous phases through reducing the particle size, however, the T c values of MgB 2 SMSCs are relatively low due to the low T c of the pure MgB 2 sample. As the particle size decreases, the grain boundaries in the sample increase and the connectivity decreases, which are disadvantages to the superconductivity [ 51 , 52 , 53 ]. One possible solution is to incorporate the inhomogeneous phase into the interior of the particles to overcome the disadvantages caused by the increasing grain boundaries with the doping concentration increasing.…”

“…As the particle size decreases, the grain boundaries in the sample increase and the connectivity decreases, which are disadvantages to the superconductivity. [53][54][55] One possible solution is to incorporate the inhomogeneous phase into the interior of the particles to overcome the disadvantages caused by the increasing grain boundaries with the doping concentration increasing.…”

Compressive properties of pristine and SiC-Te-added MgB 2 powders, green compacts and spark-plasma-sintered bulks

“…substitution of B by C. Indentation tests (Vickers hardness and fracture toughness), and room temperature bending strength tests are reported in refs. [3][4][5][6][7][8][9][10] and [11][12][13][14], respectively. Elastic constants of MgB2 were calculated [15][16][17] or determined experimentally [18][19][20], and they are consistent with each other.…”