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A Process for Producing “Granular Single Crystals” of Ceramics from Polycrystals by Biaxial Alignment, Demonstrated for High-Tc Superconductors

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Abstract

A recently developed method for producing triaxial alignment of single crystalline grains may be applicable to ceramics other than the high-Tc cuprate superconductors for which it was designed as a means of reducing the grain boundary weak links due to grain orientational misfit. This technique uses a suitable combination of a mechanical force and a magnetic field acting on the moment of a rare earth element incorporated into the ceramic; a “granular single crystal” is thus formed. A detailed step-by-step procedure is presented here to facilitate use of the new approach.

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Acknowledgements

The field alignment was carried out in the horizontal field facilities of the Francis Bitter National Magnet Lab. We thank L. Rubin and B. Brandt for their hospitality there. We are grateful for support of this work by the US Department of Energy under subcontract from Intermagnetics General Corporation.

Publication No. 512 from the Barnett Institute.

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Hidalgo, R., Zhanl, XY., Wang, SQ. et al. A Process for Producing “Granular Single Crystals” of Ceramics from Polycrystals by Biaxial Alignment, Demonstrated for High-Tc Superconductors. MRS Online Proceedings Library 249, 293–298 (1991). https://doi.org/10.1557/PROC-249-293

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