A method for making large scale electrical contacts to yttrium based high temperature superconductors is described. This involves flame spraying of copper wire onto an abrasion cleaned superconductor surface. Using this technique contact resistivities of the order of 500 μΩ cm2can be easily achieved. This is a process which can be carried out without the need for large scale vacuum equipment or clean facilities, and as such represents a step towards the production of cryostabilized high Tcsuperconductors outside the laboratory environment. © 1989.
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