EFFECT OF PRE-ANNEALING IN THERMAL PROCESSING OF Bi-2212 ROUND WIRES

被引：3
|
作者：
Baca, F. J. [1 ]
Holesinger, T. G. [1 ]
Coulter, J. Y. [1 ]
Miao, H. [2 ]
Huang, Y. [2 ]
Parrell, J. [2 ]
Campbell, S. [3 ]
Searcy, J. [1 ]
Sooby, E. [1 ]
Kennison, J. [1 ]
DePaula, R. [1 ]
Apodaca, I. [1 ]
Marken, K. [1 ]
机构：
[1] Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA
[2] Oxford Inst Superconducting Technol, Carteret, NJ 07008 USA
[3] SCI Engineered Mat, Columbus, OH 43228 USA
来源：
ADVANCES IN CRYOGENIC ENGINEERING, VOL 58 | 2012年 / 1435卷
关键词：
Bi(2)Sr(2)CaCu(2)Ox (Bi-2212) wires; Melt texturing; High temperature superconductivity; Heat treatment optimization;
D O I：
10.1063/1.4712114
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Bi(2)Sr(2)CaCu(2)Ox (Bi-2212) superconducting wires are of interest for producing the next generation of high field (greater than 20 T) magnet windings. However, improvements in critical current must be achieved to make them fully viable for such applications. Fully optimizing the thermal reaction in the melt-processing is a means of maximizing the capabilities of wires presently available. Using methods of Statistically Designed Experiments, the process variables may be simultaneously optimized to maximize J(c), and in this work, we show the effects of including and varying the parameters of a pre-anneal in the thermal reaction cycle. We find that the critical current is less sensitive to changes in the pre-anneal temperature, and is more responsive to changes in the dwell time. We examine the microstructure for varied dwell times and show the fitted response surfaces for J(c) as a function of the pre-anneal parameters.
引用
收藏
页码：340 / 345
页数：6
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