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HRTEM Study on the Structure of Boundaries between Grains of Different Phases in BSCCO-Type Ceramics

✍ Scribed by Zakharov, N. D. ;Hesse, D. ;Frank, H. ;Stollmann, R. ;Güntherodt, G.

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 433 KB
Volume: 168
Category: Article
ISSN: 0031-8965
DOI: 10.1002/(sici)1521-396x(199808)168:2<381::aid-pssa381>3.0.co;2-j

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✦ Synopsis

The structure of grain boundaries between grains of different BSCCO-type phases in BSCCO ceramics is investigated by high-resolution transmission electron microscopy (HRTEM). Regular interphase grain boundary structures are found, and corresponding atomic scale models are derived. The structure of two interphase tilt boundaries, viz. 2212/2201 and 2212/1212, is investigated in detail. The results show that ± ± in analogy to grain boundaries between grains of the same phase ± ± also interphase grain boundaries in high-T c superconducting (HTSC) materials are characterized by a periodic structure providing alternating areas of good and less good conditions for supercurrent flow.

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