The Effect of Long-Term Exposure to High Temperature Atmosphere on the Mechanical Properties of Al2O3-Based Ceramic Materials

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F19%3AN0000053" target="_blank" >RIV/26722445:_____/19:N0000053 - isvavai.cz</a>
Result on the web
<a href="https://www.irsm.cas.cz/materialy/cs_content/2019_doi/Hlincik_CS_2019_0046.pdf" target="_blank" >https://www.irsm.cas.cz/materialy/cs_content/2019_doi/Hlincik_CS_2019_0046.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.13168/cs.2019.0046" target="_blank" >10.13168/cs.2019.0046</a>

Result language
angličtina
Original language name
The Effect of Long-Term Exposure to High Temperature Atmosphere on the Mechanical Properties of Al2O3-Based Ceramic Materials
Original language description
Two corundum-based ceramic materials (C799 and C795) and one type of mullite ceramics (C610) have been tested for the production of components of technological circuits working with high-temperature helium and supercritical water. The materials were exposed to an atmosphere of high-temperature helium (900 degrees C), air (900 degrees C) and supercritical water (577 degrees C; 24 MPa) for 1000 hours and subsequently tested for bending strength at temperatures up to 1400 degrees C. The highest bending strength was exhibited by the corundum ceramics C799 (more than 300 MPa at 25 degrees C); for a significant decrease in the strength, it was necessary to use temperatures higher than 1000 degrees C. This material also exhibited relatively good stability during exposure to high-temperature helium, hot air as well as supercritical water; after 1000-hour exposure, its tensile strength decreased by maximally 11 %. Therefore, the pure corundum material has been evaluated as the most suitable among the tested materials for the production of components of the mentioned technological circuits.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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