It has been shown that the requirements of a turbine rotor and the properties of the ceramic materials lead to a multi density rotor. Three concepts for the fabrication of such a rotor are being investigated. Strength testing has shown that hubs and prototype multi density rotors have already attained or come close to the developmental goals. The results and thermal shock testing show no problems in the case of blades. However, cracks have developed in the reaction sintered rim. This may indicate that solutions should be found in bonding a hub to single blades or vice versa. Exposing of material specimen to hot air for a long time has shown that oxidation might be a considerable problem. More material development has to be done before a ceramic rotor is able to survive the conditions in a turbine.


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    Title :

    Development of a turbine rotor of silicon nitride


    Additional title:

    Entwicklung eines Turbinenlaufrades aus Siliziumnitrid


    Contributors:
    Walzer, P. (author) / Langer, M. (author) / Siebels, J. (author)

    Published in:

    Z. Werkstofftech. ; 8 , 9 ; 294-299


    Publication date :

    1977


    Size :

    6 Seiten, 1 Quelle



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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