This paper shows possibilities for joining ceramic rotors to metal shafts. The investigations presented include exemplary joining methods for shaft–hub connections for ceramic rotors in gas turbines, as positive, permanent locking, or a combination of both. Active brazing as well as the combination of brazing or adhesive bonding and positive locking are discussed. Different shaft–hub connections were tested. The results of experimental investigations as static shear, bending, and torsion tests as well as dynamic torsion tests will be presented. In addition to the experimental investigations, finite-element analyses were made. Elastic calculations on simple geometries have shown the influence of different parameters like the thermal coefficients and the geometry at the joint face. Calculations were done to reduce the induced tensile stress in the joint and to increase carrying capacity. The calculations were also transferred to the shaft–hub connections to optimize the geometry of the joint faces.

Issue Section:
Gas Turbines: Manufacturing and Materials
Topics:
Ceramics, Gas turbines, Metals, Brazing, Geometry, Joining, Rotors, Torsion, Adhesives, Bonding, Finite element analysis, Shear (Mechanics), Tension
1.
Esebeck, G. v., and Beitz, W., 1993, “Investigations on the Behaviour of Shaft-Hub Connections and Screw Connections of Ceramic and Metal With the Help of Adhesive and Braze Form Components,” Third Euro-Ceramics, Faenza Editrice Iberica.
2.
Esebeck, G. v., 1994, “Tragfa¨higkeit von stoffschlu¨ssig hergestellten Formschlußverbindungen fu¨r keramische Bauteile,” Dissertation, Technical University Berlin, Schriftenreihe Konstruktionstechnik, Berlin.
3.
Huber, J., and Heinrich, J., 1989, “Keramik im Verbrennungsmotor,” Fort-schrittsberichte der Deutschen Keramischen Gesellschaft, Vol. 4.
4.
Katano
Y.
,
Ando
M.
,
Itoh
T.
, and
Sasaki
M.
,
1993
, “
Application of Ceramics to Turbocharger Rotors for Passenger Cars
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
115
, pp.
9
–
16
.
5.
Kising, M., 1994, “Einfluß von Werkstu¨ckgestaltung and Fertigungsbedingungen auf das temperaturabha¨ngige Festigkeitsverhalten von Keramik-Metall-Lo¨tverbindungen,” Dissertation, Technical University Berlin-Du¨sseldorf, VDI-Verlag.
6.
Shimizu, T., Takama, K., Enokishima, H., Mikame, K., and Tsuji, S., 1990, “Silicon Nitride Turbocharger Rotor for High Performance Automotive Engines,” SAE Technical Paper.
7.
Zinner, K. A., 1985, Auf ladung von Verbrennungsmotoren, 3rd ed., Springer Verlag, Berlin.
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