Effect of high temperature oxidation on the radiative properties of HfC-based ceramics

Abstract : Hafnium carbide (HfC) is a promising material for high-temperature heat exchangers due to its high melting point (4170 K). Nevertheless, its fast oxidation into fragile hafnia prevents it from being used for open-air solar receivers. The incorporation of silicon-based compounds would reduce its oxidation kinetics and extend the lifetime of HfC-based elements. The oxidation behavior of HfC sintered with the addition of 10vol% TaSi2 or ZrSi2 is here investigated. The optical properties on the as-received surfaces and on the oxidized ones were measured, especially the ratio of the 0.6-2.8 μm emissivity (close to the solar absorptivity α) to the total hemispherical emissivity ε. These optical properties are important parameters for applications using concentrated solar radiation. /318465137_Effect_of_high_temperature_oxidation_on_the_radiative_properties_of_HfC-based_ceramics [accessed Oct 03 2018].
Complete list of metadatas

https://hal-univ-perp.archives-ouvertes.fr/hal-01886935
Contributor : Dorian Miler <>
Submitted on : Wednesday, October 3, 2018 - 1:43:33 PM
Last modification on : Thursday, October 4, 2018 - 1:13:39 AM

Identifiers

Collections

Citation

Ludovic Charpentier, Marianne Balat-Pichelin, Jean-Louis Sans, Diletta Sciti, Laura Silvestroni. Effect of high temperature oxidation on the radiative properties of HfC-based ceramics. Corrosion Science, Elsevier, 2017, 126, pp.255 - 264. ⟨10.1016/j.corsci.2017.07.007⟩. ⟨hal-01886935⟩

Share

Metrics

Record views

14