Deformation processing of high-T_c superconducting oxides

Plastic deformation and texture development in polycrystalline YBa₂Cu₃O_{7- δ} has been studied to expedite the process development of high-critical-temperature (high-T_c) superconducting wires and tapes. It is anticipated that deformation texture will be a major processing consideration in terms of maximizing critical current density, assessing conductor-fabrication options in light of critical current density, and developing such mechanical properties as strength, toughness and thermal fatigue. The intrinsic texture development in YBa₂Cu₃O_{7- δ} deformation processing should be highly beneficial, insofar as the c axes of the crystals tend to become oriented along the compression axis. This means that conducting tapes and wires formed by rolling, extrusion and drawing can develop textures with the c axis in the transverse or radial direction, thus maximizing the flow of current along the length of the conductor.