Fabrication of YBa2Cu3O7−x (YBCO) superconductor bulk structures by extrusion freeforming. Issue 14 (1st November 2016)

• Record Type: Journal Article
• Authors: Wei, Xiangxia; Nagarajan, Ragavendran Sundaram; Peng, Erwin; Xue, Junmin; Wang, John; Ding, Jun
• Is Part Of: Ceramics international. Volume 42:Issue 14(2016)
• Page Start: 15836
• Page End: 15842
• Publication Date: 2016-11-01
• Subjects: 3D printing -- Extrusion freeforming -- Bulk YBCO superconductor -- Complex shapes; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.07.052
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Practical applications of high temperature superconductors may require them to be processed into complex geometries. In this work, slurry-based extrusion freeforming coupled with high temperature treatment was attempted for the fabrication of bulk YBa2 Cu3 O7−x (YBCO) superconducting structures. YBCO parts with approximately 93% of the theoretical density were successfully fabricated after sintering at 940 °C for 60 h, with the obtained constituent phases strongly dependent on the heat treatment temperature and duration. A high critical transition temperature ( T C =92 K) and good magnetic levitation ability could be obtained after optimization of the heat treatment conditions. Overall, the experimental results demonstrate that extrusion freeforming is a feasible and effective technique for fabricating YBCO superconductors that have desirable configurations and good superconductivity properties.