| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000329394 |
| ISSN: | 0103-9733 |
| Autores: | Azambuja, Paula de1 Rodrigues-Junior, Pedro1 Jurelo, Alcione Roberto1 Serbena, Francisco Carlos1 Foerster, Carlos Eugenio1 Menegotto Costa, Rosangela1 Biscaia de Souza, Gelson2 Lepienski, Carlos Mauricio3 Chinelatto, Adilson Luiz4 |
| Instituciones: | 1Universidade Estadual de Ponta Grossa, Departamento de Física, Ponta Grossa, Parana. Brasil 2Universidade Estadual de Maringa, Departamento de Ciencias, Maringa, Parana. Brasil 3Universidade Federal do Parana, Departamento de Física, Curitiba, Parana. Brasil 4Universidade Estadual de Ponta Grossa, Departamento de Engenharia de Materiais, Ponta Grossa, Parana. Brasil |
| Año: | 2009 |
| Periodo: | Dic |
| Volumen: | 39 |
| Número: | 4 |
| Paginación: | 638-644 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | The effects of Ag addition on some physical properties of YBa2Cu3O7-δ superconductor has been studied. The samples were produced by different routes and characterized by scanning electron microscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction and nanoindentation. The superconducting properties were studied by dc magnetization and electrical resistivity measurements. The X-ray patterns revealed that all samples were polycrystalline and corresponded to the orthorhombic YBa2Cu3O7-δ phase. However, for some samples, silver appears to be present within the grains. The superconducting properties were not significantly influenced by Ag addition. Hardness and elastic modulus were also obtained by instrumented indentation. Ag addition was found to be effective in improving the mechanical properties, probably by filling the pores in the grain boundaries. Hardness profiles indicated values between 3.1 and 3.4 GPa at deep tip penetration depths. The highest elastic modulus of 146 GPa was attained for samples prepared using Y2O3, BaCO3, CuO and Ag2O as precursors, while the lowest modulus (125 GPa) was obtained for the pure YBa2Cu3O7-δ sample |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física, Física de materia condensada, Superconductor de alta temperatura, Materiales policristalinos, YBCO, Adiciones de plata |
| Keyword: | Physics and astronomy, Condensed matter physics, Physics, High-TC Superconductor, Polycrystaline materials, YBCO, Silver additions |
| Texto completo: | Texto completo (Ver HTML) |
