Welding of YBa2Cu3OT-x Superconductor

with superconductivity transition temperatures above 90 ~ have potential applications in almost every aspect of human life 2-4. It ranges from the levitated trains to microelec-tronic interconnects. High Tc superconductors including YBa2Cu307-x and other more recently discovered materials with even higher super-conductivity transition temperatures have been studied extensively. In order to make the application of these new classes of materials more practical, it is necessary that pieces of these materials can be effectively bonded together both mechanically and electrically. We have studied and developed methods of fab-ricating high performance metal-HTSC contacts