| Numéro |
J. Phys. Colloques
Volume 51, Numéro C1, Janvier 1990
Proceeding of the International CongressIntergranular and Interphase Boundaries in materials |
|
|---|---|---|
| Page(s) | C1-959 - C1-964 | |
| DOI | https://doi.org/10.1051/jphyscol:19901149 | |
J. Phys. Colloques 51, C1-959-C1-964 (1990)
DOI: 10.1051/jphyscol:19901149
1 Department of Physics, Chalmers University of Technology, S-412 96 Gothenburg, Sweden
2 Department of Mining and Metallurgical Engineering, University of Queensland, St. Lucia, Queensland 4067, Australia
DOI: 10.1051/jphyscol:19901149
INTERFACIAL MICROSTRUCTURE IN Y1 Ba2 Cu3 O7-δ HIGH Tc SUPERCONDUCTORS
J. ALARCO1 et G.L. DUNLOP21 Department of Physics, Chalmers University of Technology, S-412 96 Gothenburg, Sweden
2 Department of Mining and Metallurgical Engineering, University of Queensland, St. Lucia, Queensland 4067, Australia
Abstract
The microstructures of YBa2 Cu3 O7-δ ceramics prepared from freeze dried powders and containing an excess of CuO have been studied by analytical electron microscopy. Special attention has been paid to the interfacial microstructure. It was found that a liquid phase formed during sintering between 890°C and 920°C and this promoted grain growth and densification. Both clean grain boundaries and boundaries containing an amorphous intergrhnular film, which was rich in Cu, have been observed. Both CuO and BaCuO2 were present as secondary phases.