Solar Absorber Coating Study.
HONEYWELL INC MINNEAPOLIS MINN SYSTEMS AND RESEARCH DIV
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The study has examined solar absorber coatings intended for use on a solar heat source system to provide thermal energy to drive spaceborne Vuilleumier cycle cryogenic refrigerators. The tests have evaluated potential coating durability for an expected 3 to 5 years in space at an operating temperature of 1600F. Two coatings, Al2O3-Mo-Al2O3 AMA and Al2O3-Pt-Al2O3 APA were tested on four substrates stainless steel, Inconel, TZM and Cb-1 percent Zr. On stainless steel and Inconel substrates both coatings were found to withstand one hour vacuum bakes up to approximately 1700F. Auger analysis indicated components of the Inconel or SS had diffused completely through the coating at higher temperatures. Modified author abstract
- Coatings, Colorants and Finishes
- Unmanned Spacecraft