Simultaneous constraint and phase conversion processing of oxide superconductors

US6555503B1 · kind B1 · utility

Assignee

• American Superconductor Corporation · US

Inventors

• Qi Li · Mountain View, US
• Elliott Thompson · West Greenwich, US
• Gilbert N. Riley, Jr. · Marlborough, US
• Eric Hellstrom · Tallahassee, US
• David C. Larbalestier · Madison, US
• Kenneth L. DeMoranville · Jefferson, US
• Jeffrey Parrell · Roselle Park, US
• Jodi Lynn Reeves · Schenectady, US

Key dates

• Filing date: Sep 20, 2000
• Grant date: Apr 29, 2003
• Expiry date: Sep 20, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/822
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of making an oxide superconductor article includes subjecting an oxide superconductor precursor to a texturing operation to orient grains of the oxide superconductor precursor to obtain a highly textured precursor; and converting the textured oxide superconducting precursor into an oxide superconductor, while simultaneously applying a force to the precursor which at least matches the expansion force experienced by the precursor during phase conversion to the oxide superconductor. The density and the degree of texture of the oxide superconductor precursor are retained during phase conversion. The constraining force may be applied isostatically.