ISSN:
1572-9567
Keywords:
coatings
;
C/C–SiC composites
;
emissivity
;
oxidation protection
;
polysilazane
;
reference materials
;
SiC coatings
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022607426413
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