Buy article online - an online subscription or single-article purchase is required to access this article.
research papers
High-resolution electron microscopy has been carried out on grain boundaries of 92% dense YBa2Cu3O7-δ in the tetragonal form. Grain boundaries were found to be predominantly parallel to (001) of one of the adjacent grains. No amorphous interlayer was observed at the grain boundaries. At some grain boundaries highly localized strains were detected.