Title :
CO2 laser welding of BiSrCaCu2Oy superconductors
Author :
Chen, Xin ; Liang, Junwen ; Wang, Engguang ; He, Ziyou ; Wang, Aihua ; Tao, Zhenyi ; Cui, Kun
Author_Institution :
Dept. of Solid Electron., Huazhong Univ. of Sci. & Technol., Hubei, China
fDate :
9/1/1990 12:00:00 AM
Abstract :
Fusion welding of high-Tc superconducting ceramics via laser was explored. Superconducting BiSrCaCu2O y ceramics were welded by a CO2 laser in air. During the welding process, oxygen flow was blown into the laser melting zone. The beads as welded exhibited semiconducting properties and were transformed into the superconducting state by subsequent annealing treatment with a zero resistance temperature of 80 K. The beads have a similar stoichiometry to that of the base material as revealed by EDAX investigation. Using this technique, butt welds and lap welds were obtained
Keywords :
annealing; bismuth compounds; calcium compounds; ceramics; high-temperature superconductors; laser beam welding; stoichiometry; strontium compounds; BiSrCaCu2Oy; CO2 laser welding; EDAX investigation; annealing; butt welds; fusion welding; high temperature superconductors; lap welds; semiconducting properties; stoichiometry; Annealing; Ceramics; Laser fusion; Optical materials; Semiconductivity; Semiconductor lasers; Semiconductor materials; Superconducting materials; Temperature; Welding;
Journal_Title :
Magnetics, IEEE Transactions on
