Mechanical and electrical properties of In-Bi solder at Bi-2212 superconductor interface with annealed Ag spray layers and Ag precoating layers

作者：Shin Seung Yong; Lee Ji Hyun; Park Hai Woong^*

来源：Transactions of Nonferrous Metals Society of China, 2009, 19(4): 961-964.

DOI：10.1016/S1003-6326(08)60386-6

• SFCL
• Bi-2212
• Ag electroplating
• Ag spray process

The electrical properties of solder contact layers between Cu-Ni shunt metal and tube type Bi-2212 superconductor that is applied in superconducting fault current limiter were studied. The contact properties of the solders are improved not only by Ag precoating layers, but also by the pre-sprayed Ag layer and subsequent Ag precoating layers. The annealed Ag sprayed layers onto Bi-2212 superconductor prior to Ag electroplating work as protecting layers for the superconductor from plating solutions. The contact angle of the electroplated Ag layer is 42.91 degrees and decreases to 15.25 degrees and 5.88 degrees with Ag sprayed layer and additional Ag electroplated layers. The Ag sprayed layer with suitable annealing prior to Ag electroplating improves contact strength of the Ag electroplated layer by about 12% due to denser microstructure of the Ag electroplated layers.

• 出版日期2009-8