Sverdun V. Regularities of the formation of the structure of superconducting joins between high-temperature superconducting blocks of MT-YBCO ceramics

The dissertation is aimed at the study of the regularities of regularities of the formation of the structure of superconducting joins between blocks of MT-YBCO ceramics. and at the development of the processes of manufacturing superconduction joins with mechanical and superconductive properties that are the same as those for the material to be joined. The possibility to form the high-quality superconducting joins between MT-YBCO blocks using powdered TmBa2Cu3O7-d (Tm123) solder has been established for the first time. The method of the formation of supercon-ducting joins between the MT-YBCO blocks with the level of critical current density і104 A/cm2 at 77 K in fields up to 1.8 T and with mechanical proper-ties that are not worse than those of the starting MT-YBCO (Vickers microhardness of the seam and the material were 4.57±0.82 and 4.82±0.45 GPa, respectively, at the 1.96 N load, with bending strength 28-32 MPa).