This paper reports radiative and thermionic effects of hafnium carbide (HfC) and Re variation in W alloys: normal spectral emissivity is used in pyrometry to determine the true temperature of a surface. Effective work function is an important consideration in the selection of the electrode materials for high-temperature thermionic energy converters in space-power applications. The normal spectral emissivity (wavelength 535 and 650 nm) and effective work function trends of W, Re, 0.35HfC with 5-20% Re were measured in the range of 1700-2500 K.


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    Title :

    Fracture-resistant ultralloys for space-power applications. Normal-spectral-emissivity and electron-emission studies of tungsten, rhenium, hafnium-carbide alloys at elevated temperatures


    Additional title:

    Bruchfeste Ultralegierungen fuer die Verwendung in Raumtriebwerken. Untersuchung des normalen Spektralemissionsverhaltens und der Elektronenemission von Legierungen aus Wolfram, Rhenium und Hafniumcarbid bei erhoehten Temperaturen


    Contributors:
    Tsao, B.H. (author) / Tang, D. (author) / Jacobson, D.L. (author) / Morris, J.F. (author)

    Published in:

    Publication date :

    1990


    Size :

    11 Seiten, 10 Bilder, 1 Tabelle, 22 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English