Abstract
A number of various high emissivity coatings has been investigated in detail. Oxide ceramic coatings for rotating x-ray anodes must have a total emissivity greater than 0.8 in order to ensure efficient cooling in vacuum. Only one of the investigated coatings showed sufficient long-term stability. For thermal protection of reusable space transportation systems during atmospheric reentry, in addition to high emissivity, oxidation resistance is required. SiC coatings and special polysilazane-based coatings have been tested. Results of emissivity measurements before and after flight experiments on the Russian FOTON capsule are also available. In order to improve the reliability of (high-temperature) emissivity measurements Pt–Rh alloys, SiC, Al2O3 doped with Cr2O3, and graphite have been tested to assess applicability as reference materials for comparative emissivity measurements by various facilities.
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REFERENCES
E. A. Hoxter and R. Hohn, Röntgenaufnahmetechnik (Siemens Aktiengesellschaft, München, 1982).
H. Hübner, Philips J. Res. 37:145 (1982).
J. C. Richmond, J. Res. NBS-C, Eng. Instrum. 67C:217 (1963).
R.C. Folweiler, Thermal Radiation Characteristics of Transparent, Semi-Transparent and Translucent Materials under Non-Isothermal Conditions, ASD-TDR-62-719 Ptl. (Wright-Patterson Air Force Base, OH, 1964).
D. C. G. Eaton, A. Pradler, and M. Lambert, ESA Bull. 61:50 (1991).
G. Neuer, Wärme und Stoffübertragung 4:133 (1971).
G. Neuer, Int. J. Thermophys. 16:257 (1995).
G. Neuer, P. Pohlmann, and E. Schreiber, Thermoelektrische Mikrosensoren, Reihe: Innovationen in der Mikrosystemtechnik, Band 26, (VDI/VDE Technologiezentrum Informationstechnik GmbH, Teltow, 1995), pp. 129–158.
E. Schreiber, G. Neuer, and B. Wörner, TEMPMEKO 90, Preprints of the 4th Symposium on Temperature and Thermal Measurement in Industry and Science (Finnish Society of Automatic Control, Helsinki, 1990), pp. 292–306.
W. Hohenauer and G. Neuer, Plansee Proceedings, Vol. 3, H. Bildstein and R. Eck, eds. (Plansee Metall AG, Reutte, 1993), pp. 373–385.
F. H. Arendts, A. Theurer, K. Maile, J. Kuhnle, G. Neuer, and R. Brandt, ZFW 19:189 (1995).
D. Heimann, Oxidationsschutzschichten für Kohlefaserverstärkte Verbundwerkstoffe durch Polymer Pyrolyse, Dissertation (Universität Stuttgart, Stuttgart, 1996).
A. Kienzle, Darstellung und Verarbeitung borhaltiger elementorganischer Vorstufen zur Herstellung keramischer Materialien in den Systemen SiCB und SiCBN, Dissertation (Universität Stuttgart, Stuttgart, 1994).
H. Hald and P. Winkelmann, 3rd European Workshop on Thermal Protection Systems, ESA-WPP-103 (ESA, Paris, 1995), pp. 117–122.
G. Neuer, R. Kochendorfer, and F. Gern, High Temp. High Press. 27/28:183 (1995/96).
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Neuer, G., Jaroma-Weiland, G. Spectral and Total Emissivity of High-Temperature Materials. International Journal of Thermophysics 19, 917–929 (1998). https://doi.org/10.1023/A:1022607426413
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DOI: https://doi.org/10.1023/A:1022607426413