Domínguez Rodríguez, ArturoJiménez Melendo, ManuelChen, NanGoretta, KennethRothman, S.J.Routbort, Jules2015-09-042015-09-0419941155-4320http://hdl.handle.net/11441/28193Data from steady-state creep and tracer diffusion tests are presented for the high- $T_{\rm c}$, superconductors YBa 2Cu 3O x, and Bi 2Sri 1.7CaCu 2O y Both compounds exhibit oxygen nonstoichiometry and possess orthorhombic, layered perovskite crystal structures in which Cu occupies the B sites and the other cations occupy the A sites. For each, the A-site cations diffuse most slowly. For every species that has been measured, diffusion is much faster in the ab-plane than in the c-direction. At low stresses, both superconductors deform by diffusional creep with the ratecontrolling species being a A-site cation in YBa 2Cu 3O x.application/pdfengAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1051/jp3:1994126