J. Cai et al., MICROWAVE JOINING OF YTTRIUM-BASED SUPERCONDUCTOR AND ITS MICROSTRUCTURE FEATURES, Journal of the American Ceramic Society, 77(4), 1994, pp. 1090-1092
A new method for joining superconductors by microwave heating has been
developed. Bars of microwave-joined, Y-based ceramic superconductors
show good mechanical integrity. After they are postannealed, the sampl
es show superconducting transition at around 89.7 K. Meanwhile, the ba
ckscattered electron images of the joined region after postannealing i
n air at 960-degrees-C for 15 h show a higher density in the joined re
gion, which has larger pores that may be caused by an accumulation of
small pores during post-heat-treatment.