The effect of long-term high-temperature exposure in gaseous atmospheres on SiC ceramics with regard to advanced applications in nuclear energy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F25%3AN0000099" target="_blank" >RIV/26722445:_____/25:N0000099 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/25:43933070 RIV/60461373:22310/25:43933070 RIV/60461373:22320/25:43933070

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0272884225051211" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884225051211</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2025.10.233" target="_blank" >10.1016/j.ceramint.2025.10.233</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of long-term high-temperature exposure in gaseous atmospheres on SiC ceramics with regard to advanced applications in nuclear energy

Popis výsledku v původním jazyce

The aim of the paper was to map the properties of dense silicon carbide ceramics after long-term high-temperature exposure in controlled atmospheres with regard to the use of SiC ceramics in the field of nuclear energy, mainly in connection with helium-cooled fourth-generation reactors. The selected atmospheres included a model gas (helium with presumed impurities), pure helium, argon, nitrogen, air, and all of the aforementioned gases with trace amounts of water. Commercial samples of dense SiC ceramics in the form of rods were tested. The samples were exposed in controlled atmospheres for 1000 h at a temperature of 900 °C. This temperature corresponded to the maximum operating temperature of the reactor. The properties of the samples were compared before and after exposure. Furthermore, elemental (XRF) and phase analysis (XRD), gravimetric measurements, microscopic characterization and microanalysis (SEM/EDS), photoelectron spectra (XPS) measurements, and strength measurements at room and elevated temperatures (CMOR, HMOR) were performed. The experiments were supplemented with a thermochemical model. It was found that the experimental conditions set do not affect the key properties of the ceramics, such as mechanical strength. This is a favorable result from the point of view of planned use. However, macroscopic changes in color were observed on the surface of the ceramic. Based on detailed analyses (XPS, etc.), these changes were attributed to the oxidation of the surface layer of SiC ceramic.

Název v anglickém jazyce

The effect of long-term high-temperature exposure in gaseous atmospheres on SiC ceramics with regard to advanced applications in nuclear energy

Popis výsledku anglicky

The aim of the paper was to map the properties of dense silicon carbide ceramics after long-term high-temperature exposure in controlled atmospheres with regard to the use of SiC ceramics in the field of nuclear energy, mainly in connection with helium-cooled fourth-generation reactors. The selected atmospheres included a model gas (helium with presumed impurities), pure helium, argon, nitrogen, air, and all of the aforementioned gases with trace amounts of water. Commercial samples of dense SiC ceramics in the form of rods were tested. The samples were exposed in controlled atmospheres for 1000 h at a temperature of 900 °C. This temperature corresponded to the maximum operating temperature of the reactor. The properties of the samples were compared before and after exposure. Furthermore, elemental (XRF) and phase analysis (XRD), gravimetric measurements, microscopic characterization and microanalysis (SEM/EDS), photoelectron spectra (XPS) measurements, and strength measurements at room and elevated temperatures (CMOR, HMOR) were performed. The experiments were supplemented with a thermochemical model. It was found that the experimental conditions set do not affect the key properties of the ceramics, such as mechanical strength. This is a favorable result from the point of view of planned use. However, macroscopic changes in color were observed on the surface of the ceramic. Based on detailed analyses (XPS, etc.), these changes were attributed to the oxidation of the surface layer of SiC ceramic.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TK02030024" target="_blank" >TK02030024: Stabilita a odolnost materiálů okruhů s vysokoteplotním héliem</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Svazek periodika

51

Číslo periodika v rámci svazku

29

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

60338-60347

Kód UT WoS článku

001625899400033

EID výsledku v databázi Scopus

2-s2.0-105020192028