Hafnium Diboride (HFB,) based materials have shown promise for use in a number of high temperature aerospace applications, including rocket nozzles and as leading edges on hypersonic reentry vehicles. The stability of the materials in relevant environments is key to determining their suitability for a particular application. In this program we have been developing HfB2/SiC materials for use as sharp leading edges. The program as a whole included processing and characterization of the HfBJSiC materials. The specific work discussed here will focus on studies of the materials oxidation behavior in simulated reentry environments through arc jet testing. Four flat face models were tested to examine the influence of heat flux and stagnation pressure on the materials oxidation behavior. The results from arc jet testing of two HfB2/SiC cone models will also be discussed. Each cone model was run multiple times with gradually increasing heat fluxes. Total run times on a single cone model exceeded 80 minutes. For both the flat face and cone models surface temperatures well in excess of 2200 C were measured. Post test microstructural examination of the models and correlations with measured temperatures will be discussed.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Arc Jet Testing of Hafnium Diboride Based Ultra High Temperature Ceramics


    Beteiligte:
    Ellerby, Don (Autor:in) / Beckman, Sarah (Autor:in) / Irby, Edward (Autor:in) / Squire, Tom (Autor:in) / Olejniczak, Joe (Autor:in) / Johnson, Sylvia M. (Autor:in) / Gusman, Michael (Autor:in) / Gasch, Matthew (Autor:in)

    Kongress:

    National Space and Missiles Materials Symposium ; 2004 ; Seattle, WA, United States


    Erscheinungsdatum :

    2003-12-08


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    Tantalum diboride-based ceramics for bulk solar absorbers

    Sciti, Diletta | Online Contents | 2014




    Arc-jet testing of ultra-high-temperature-ceramics

    Savino, Raffaele / De Stefano Fumo, Mario / Paterna, Diego et al. | Elsevier | 2009