中国物理B ›› 2015, Vol. 24 ›› Issue (9): 96805-096805.doi: 10.1088/1674-1056/24/9/096805

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Transient liquid assisted nucleation mechanism of YBa2Cu3O7-δ in coated conductor films derived by BaF2 process

谷朝辉, 杨文涛, 白传易, 郭艳群, 鲁玉明, 刘志勇, 路齐, 舒刚强, 蔡传兵   

  1. Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444, China
  • 收稿日期:2015-01-09 修回日期:2015-03-30 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 13111102300 and 11dz1100302), the National Natural Science Foundation of China (Grant Nos. 11174193 and 51202141), the National Basic Research Program of China (Grant Nos. 2011CBA00105), and the Science and Technology Commission of Shanghai Municipality, China (Grant No. 14DZ2260700).

Transient liquid assisted nucleation mechanism of YBa2Cu3O7-δ in coated conductor films derived by BaF2 process

Gu Zhao-Hui (谷朝辉), Yang Wen-Tao (杨文涛), Bai Chuan-Yi (白传易), Guo Yan-Qun (郭艳群), Lu Yu-Ming (鲁玉明), Liu Zhi-Yong (刘志勇), Lu Qi (路齐), Shu Gang-Qiang (舒刚强), Cai Chuan-Bing (蔡传兵)   

  1. Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444, China
  • Received:2015-01-09 Revised:2015-03-30 Online:2015-09-05 Published:2015-09-05
  • Contact: Cai Chuan-Bing E-mail:cbcai@staff.shu.edu.cn
  • Supported by:
    Project supported by the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 13111102300 and 11dz1100302), the National Natural Science Foundation of China (Grant Nos. 11174193 and 51202141), the National Basic Research Program of China (Grant Nos. 2011CBA00105), and the Science and Technology Commission of Shanghai Municipality, China (Grant No. 14DZ2260700).

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摘要： It is significant for low-cost preparation of YBa2Cu3O7-δ (YBCO) coated conductors to make clear the mechanism of orientation, copper segregation, and nucleation density in BaF2-derived YBCO crystallization. In the present work, a distinct nucleation mechanism was proposed based on a transient liquid phase induced by the size effect as well as near-equilibrium assumption. With this scheme the nucleation of YBCO prepared by metal-organic deposition (MOD) or the physical vapor deposition BaF2 process was semi-quantitatively analyzed, revealing that the direct driving force for nucleation is YBCO supersaturation in the liquid phase. The theoretical analysis on the nucleation orientation portion is evidenced by the experimental result.

关键词: YBa2Cu3O7-δ, coated conductor, nucleation

Abstract: It is significant for low-cost preparation of YBa2Cu3O7-δ (YBCO) coated conductors to make clear the mechanism of orientation, copper segregation, and nucleation density in BaF2-derived YBCO crystallization. In the present work, a distinct nucleation mechanism was proposed based on a transient liquid phase induced by the size effect as well as near-equilibrium assumption. With this scheme the nucleation of YBCO prepared by metal-organic deposition (MOD) or the physical vapor deposition BaF2 process was semi-quantitatively analyzed, revealing that the direct driving force for nucleation is YBCO supersaturation in the liquid phase. The theoretical analysis on the nucleation orientation portion is evidenced by the experimental result.

Key words: YBa2Cu3O7-δ, coated conductor, nucleation

中图分类号:  (Nucleation and growth)

  • 68.55.A-
64.75.St (Phase separation and segregation in thin films)