Refractory metal (W,Ti) - refractory carbide (Ti,W)C alloys formed by eutectic solidification from the melt-cermelts -are promising materials for high temperature rocket nozzle applications. At the Center for Laser Applications (CLA) at the University of Tennessee Space Institute (UTSI), these materials are being formed into three-dimensional shapes using various laser powder deposition techniques. Shapes with cylindrical symmetry are built on graphite mandrels by laser melting a continuous powder feedstock mix. Processing is performed inside a Argon atmosphere and the obtained materials have a fully dense microstructure of fine (Ti,W)C dendrites surrounded by the (W,Ti) - (Ti,W)C eutectic. With a melting temperature of 2700 deg C, this microstructure is expected to offer high temperature strength, toughness and erosion resistance at elevated temperatures. The specific axis-symmetric solid freeform fabrication technique, typical processing conditions and a representative set of results are presented herein.


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    Titel :

    Axis-symmetric solid freeform fabrication of W-TiC cermelt rocket nozzles


    Weitere Titelangaben:

    Rotationskörper-Freiformen von W-TiC Cermelts-Raketendüsen


    Beteiligte:
    Costa, Lino (Autor:in) / Hofmeister, William (Autor:in) / Rajput, Deepak (Autor:in) / Lansford, Kathleen (Autor:in)


    Erscheinungsdatum :

    2008


    Format / Umfang :

    10 Seiten, 12 Bilder, 24 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    LOW-COST FABRICATION TECHNIQUES FOR SOLID ROCKET NOZZLES

    WARGA, J. J. | SAE Technical Papers | 1970


    Advanced Rocket Nozzles

    Gerald Hagemann / Hans Immich / Thong Van Nguyen et al. | AIAA | 1998