A rotor-shaft assembly which includes a ceramic, solid hubbed turbine rotor (32) having an integral stub shaft (70) brazed within one end of a generally cylindrically shaped sleeve (72). A metal shaft (36) is either brazed or cold press fined within the other end of the sleeve in a torque trans- mining relationship. The stub shaft (70) is formed with an annular relief (71) around it in order to reduce the compressive forces acting on the stub shaft by the sleeve.
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