Influence of crystal plane on the welding quality of YBCO bulk superconductor

被引：3
|
作者：
Sefcikova, M. [1 ]
Diko, P. [1 ]
Bozzo, B. [2 ]
Granados, X. [2 ]
Obradors, X. [2 ]
机构：
[1] Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia
[2] CSIC Campus, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2008年 / 151卷 / 01期
关键词：
YBCO superconductors; TSMG; welds; microstructure;
D O I：
10.1016/j.mseb.2008.03.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of welds parallel to the {1 0 0} and the {1 1 0} crystal planes of the single-grain YBa2Cu3O7/Y2BaCuO5 (Y123/Y211) bulk superconductors welded by Ag foil has been studied. It is shown that a zone free of small Y211 particles is formed along the both sides of the welds. Formation of this zone is explained by higher Y content in the melt produced during heating and leaking out of the weld. The different morphology of the rest solidified liquid in the welds, which has a tendency to form films in the {1 0 0} welds and granules in the {1 1 0} welds, is associated with different surface energies of welded surfaces. Cracking suppression of the {1 1 0} welds was observed and is ascribed to higher fracture toughness for this plane. The quality of the weld is confirmed by the trapped field measurements. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 110
页数：4
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