Investigation of the melt-growth process of YbBa2Cu3O7-δ powder in Ag-sheathed tapes

被引：3

作者：

Zhang, Zili ^{[1
,2
]}

Jiang, Jianyi ^{[1
]}

Tian, Hui ^{[3
]}

Wang, Qiuliang ^{[2
]}

Larbalestier, David C. ^{[1
]}

Hellstrom, Eric E. ^{[1
]}

机构：

[1] Florida State Univ, Appl Superconduct Ctr, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[2] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

[3] Tsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China

来源：

CRYSTENGCOMM | 2019年 / 21卷 / 09期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

CRITICAL-CURRENT-DENSITY; HIGH-JC; SILVER; WIRES; FILMS; YBA2CU3O7-DELTA; SUPERCONDUCTOR; BEHAVIOR; TEXTURE;

D O I：

10.1039/c8ce02079e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigated the melt-growth behavior of YbBa2Cu3O7-delta (Yb123) powder under different atmospheres for potential application in Ag-sheathed Yb123 wires. We chose Yb123 because it has the lowest melting temperature of the RE123 (RE = rare earth) phases. Yb123 needs to be melted under low oxygen partial pressure (pO(2)) to depress its melt temperature below that of Ag. Here we report that adding Ag powder to Yb123 powder or encasing Yb123 powder in a Ag-sheath further decreases the melting temperature of Yb123. We designed a heat treatment process in which we varied the pO(2) during the heat treatment to melt the Yb123 in a Ag-sheathed powder-in-tube (PIT) wire and then regrow Yb123 on cooling. Based on these studies, we have developed a model for Yb123 melting and growth.

引用

页码：1369 / 1377

页数：9

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