Correlation between the phase composition of composite YBa2Cu3O7−δ+xMeO superconductors and their strength characteristics

Experimental results on the doping of YBa2Cu3O7−δ superconducting ceramic with various metals (Ti, Zr, Ag, Hf, Ta, and W) are summarized. Some conclusions are drawn on the degree of chemical interaction between the metals and the main phase of the composite responsible for the superconducting properties of the material as a whole. An assessment is also made if the influence of doping on the strength characteristics, which vary in the composite as a result of different effects examined in this study.