TY - JOUR
T1 - Microstructural characteristics of melt-powder-melt-grown YBa2Cu3O7-x crystals
AU - Miletich, R.
AU - Murakami, M.
AU - Preisinger, A.
AU - Weber, H. W.
N1 - Funding Information:
This work is supported in part by Fonds zur For-derung der Wissenschaftlichen Forschung, Wien, under contract No. 7970. Thanks are due to E. Li-bowitzky, Institut fur Mineralogie und Kristallogra-phie, Universitlt Wien, for his assistancew ith the SEM-investigations.
PY - 1993/5/1
Y1 - 1993/5/1
N2 - Melt-powder-melt-grown crystals of high-Tc YBa2Cu3O7-δ were prepared from different chemical starting compositions. They all show well textured microstructures with characteristic differences and various amounts of included phases (Y2BaCuO5, Ba4Cu2PtO9, and metallic silver) depending on the starting composition. Detailed investigations with polarized reflected light, XRF, EDX and X-ray diffraction reveal characteristic features of the microstructure such as the distribution of included phases as well as twinning and crack formation, which are related to local variations in oxygen content in these materials. Increasing silver contents result in a reduction of cracking. The occurence of domain-like regions with distinct large twin lamellae is correlated with the distribution of Y2BaCuO5 inclusions.
AB - Melt-powder-melt-grown crystals of high-Tc YBa2Cu3O7-δ were prepared from different chemical starting compositions. They all show well textured microstructures with characteristic differences and various amounts of included phases (Y2BaCuO5, Ba4Cu2PtO9, and metallic silver) depending on the starting composition. Detailed investigations with polarized reflected light, XRF, EDX and X-ray diffraction reveal characteristic features of the microstructure such as the distribution of included phases as well as twinning and crack formation, which are related to local variations in oxygen content in these materials. Increasing silver contents result in a reduction of cracking. The occurence of domain-like regions with distinct large twin lamellae is correlated with the distribution of Y2BaCuO5 inclusions.
UR - http://www.scopus.com/inward/record.url?scp=0027591046&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027591046&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(93)90554-4
DO - 10.1016/0921-4534(93)90554-4
M3 - Article
AN - SCOPUS:0027591046
SN - 0921-4534
VL - 209
SP - 415
EP - 420
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 4
ER -