Local misorientation change along grain boundary in coarse-grained YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} prepared by melt-texturing process
- Tohoku Univ., Sendai (Japan)
The grain boundary is one of the most important microstructural elements that can affect mechanical and electrical properties of polycrystalline materials. In particular, the electrical properties of superconducting materials are strongly influenced by grain boundaries. Since the discovery of high temperature superconducting ceramics, many features focused on the grain boundary have been investigated systematically, and a strong dependence of the critical current density, Jc, on the grain boundary type and misorientation has been found by several research groups. It is important to relate characteristic features of the microstructure to the materials processing. Therefore, the objective of this work was to assess a local change of boundary misorientation along grain boundaries and to describe the features of grain boundaries introduced in the bulk materials grown by the MPMG (Melt-Powder-Melt-Growth) process. The present investigation has revealed that the misorientation angle can change locally and systematically along a grain boundary due to the interaction with sub-boundaries in coarse-grained YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} (YBCO) grown by the MPMG process. More detailed analysis of grain boundary character is required for engineering grain boundaries in superconducting polycrystalline YBCO.
- OSTI ID:
- 516844
- Journal Information:
- Scripta Materialia, Vol. 37, Issue 2; Other Information: PBD: 15 Jul 1997
- Country of Publication:
- United States
- Language:
- English
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