Enhancement of oxidation resistance of graphite foams by polymer derived-silicon carbide coating for concentrated solar power applications

Kim, T.; Singh, D.; Singh, M.

doi:10.1016/j.egypro.2015.03.170

Enhancement of oxidation resistance of graphite foams by polymer derived-silicon carbide coating for concentrated solar power applications

Journal Article · Fri May 01 00:00:00 EDT 2015 · Energy Procedia (Online)

DOI:https://doi.org/10.1016/j.egypro.2015.03.170· OSTI ID:1196241

Kim, T. ^[1]; Singh, D. ^[1]; Singh, M. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States)
Ohio Aerospace Inst., Cleveland, OH (United States)

Graphite foam with extremely high thermal conductivity has been investigated to enhance heat transfer of latent heat thermal energy storage (LHTES) systems. However, the use of graphite foam for elevated temperature applications (>600 °C) is limited due to poor oxidation resistance of graphite. In the present study, oxidation resistance of graphite foam coated with silicon carbide (SiC) was investigated. A pre-ceramic polymer derived coating (PDC) method was used to form a SiC coating on the graphite foams. Post coating deposition, the samples were analyzed by scanning electron microscopy and energy dispersive spectroscopy. The oxidation resistance of PDC-SiC coating was quantified by measuring the weight of the samples at several measuring points. The experiments were conducted under static argon atmosphere in a furnace. After the experiments, oxidation rates (%/hour) were calculated to predict the lifetime of the graphite foams. The experimental results showed that the PDC-SiC coating could prevent the oxidation of graphite foam under static argon atmosphere up to 900 °C.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1196241

Journal Information:: Energy Procedia (Online), Journal Name: Energy Procedia (Online) Journal Issue: C Vol. 69; ISSN 1876-6102

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
graphite foam
latent heat
oxidation
polymer derived coating
silicon carbide
thermal energy storage

Enhancement of oxidation resistance of graphite foams by polymer derived-silicon carbide coating for concentrated solar power applications

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