ENHANCEMENT OF OXIDATION RESISTANCE OF GRAPHITE FOAMS BY SiC COATING FOR CONCENTRATED SOLAR POWER APPLICATIONS

Graphite foam was coated with SiC by infiltrating the foam with SiO vapour at 1450 C. Specimens with uniform coatings of SiC 0.11, 0.23 and 0.73 g/cm3 were prepared and characterised by SEM/EDS and XRD. The oxidation resistance, determined as weight loss, was measured in static and flowing argon at...

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Bibliographic Details
Published inCeramic Engineering and Science Proceedings pp. 163 - 175
Main Authors Kim, T, Singh, D, Singh, M
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Argon
Ceramics
Coating
Electric power generation
Foams
Graphite
Oxidation resistance
Silicon carbide
Weight loss
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ISBN1119031184
9781119031185
ISSN0196-6219

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Summary:Graphite foam was coated with SiC by infiltrating the foam with SiO vapour at 1450 C. Specimens with uniform coatings of SiC 0.11, 0.23 and 0.73 g/cm3 were prepared and characterised by SEM/EDS and XRD. The oxidation resistance, determined as weight loss, was measured in static and flowing argon at temperatures up to 900 C, to simulate the environment experienced by graphite foam in concentrated solar power plant. The static measurements were made at argon pressures of 0.2 mTorr or 20 mTorr. The coating significantly improved the oxidation resistance. The weight loss rates decreased with increasing exposure time and were stabilised in the flowing argon atmosphere. This showed some oxidation was occurring, attributed to leakage of air into the system.
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ISBN:1119031184
9781119031185
ISSN:0196-6219