Metal-ceramic high temperature superconductor composite and process for bonding a ceramic high temperature superconductor to a metal

Abstract

A method is provided for bonding a ceramic ht superconductor to metal support that includes bonding the ceramic ht superconductor to a metal support by a heat conductive bonding agent. The heat conductive bonding agent is filled into at least one through hole provided in the ceramic ht superconductor, where the bonding agent, at the interface between the metal support and the ceramic ht superconductor and the bonding agent within the at least one through hole, is in contact with each other.

1 . Method for bonding a ceramic ht superconductor to metal support, said method comprising the steps of:
 bonding the ceramic ht superconductor to a metal support by a heat conductive bonding agent; and   filling said heat conductive bonding agent into at least one through hole provided in the ceramic ht superconductor, wherein said bonding agent, at the interface between the metal support and the ceramic ht superconductor and the bonding agent within the at least one through hole, being in contact with each other.   
   
   
       2 . Method according to  claim 1 , wherein the at least one through hole has a conical shape with a diameter decreasing towards the support. 
   
   
       3 . Method according to  claim 1 , wherein the bonding of the superconductor to the metal support is carried out by soldering. 
   
   
       4 . Method according to  claim 1 , wherein the bonding of the superconductor to the metal support is carried out by an adhesive system. 
   
   
       5 . Method according to  claim 1 , where in the bottom surface of the superconductor and/or the inner surface of the wall of at least one trough hole are at least partially metalized by applying a metal on the surface. 
   
   
       6 . Method according to  claim 5 , wherein the metallization is carried out by forming a burnt in metal layer by applying metal on the surface to me metalized and subjecting the surface to heat treatment. 
   
   
       7 . Method according to  claim 1 , where in the superconductor is of REBa2Cu3O type with the RE being Rare Earth Metal selected from the group consisting of Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb. 
   
   
       8 . Use if a metal ceramic ht superconductor composite according to  claim 1 , for flywheels, electric motors and bearing housing.