Processing of YBCO single crystals was carried out by solidification of semi-liquid YBCO composition using a seeding technique. Microstructural characterization of the pinning centers was investigated by transmission electron microscopy. Characterization of single crystals was carried out, relating grain size and shape to the corresponding flux profiles. Current densities were calculated based on measured trapped fields. Once circulating currents were established, flux pumping and quenching experiments were conducted. These large single crystals will be incorporated into electromagnetic forming devices for use in the military and commercial aircraft manufacturing and service industries.


Materials Science and Engineering

Keywords and Phrases

TEM; YBCO Single Crystals; YBa_2 Cu_3 O_7-X; Barium Compounds; Bulk Superconductors; Circulating Currents; Critical Current Density (Superconductivity); Current Density; Electromagnetic Forming Devices; Flux Pinning; Flux Profiles; Flux Pumping; Grain Size; High Field Magnet Applications; High-Temperature Superconductors; Microstructure; Permanent Magnets; Pinning Centers; Quenching; Seeding Technique; Semi-Liquid YBCO Composition; Transmission Electron Microscope Examination of Materials; Transmission Electron Microscopy; Trapped Fields; Yttrium Compounds

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 1993 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 1993