| 摘要 |
PURPOSE:To hinder defoliation at the joint surfaces by jointing a ceramic rotary shaft of a turbine with another rotary shaft made of a composite material having an equal coefficient of thermal expansion to said ceramic material. CONSTITUTION:A shaft 1a and a radial turbine impeller 1 consisting of ceramics are formed as in a single piece, and to the end face of this shaft 1a the end face of another rotary shaft 6 consisting of a composite material is jointed fast by means of adhesives 7, wherein the composite material shall have an equal coefficient of thermal expansion to said ceramic material. In this manner, the difference of thermal expansion between the shaft 1a and rotary shaft 6 at a high temperature can be lessened to serve hindrance of defoliation at the joint surfaces. |
