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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ceramics - Silikáty

ISSN

0862-5468

e-ISSN

1804-5847

Svazek periodika

64

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

35-39

Kód UT WoS článku

000508638600005

EID výsledku v databázi Scopus

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