Effect of high-temperature inert gas atmosphere on the thermal stability of advanced refractory materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43923888" target="_blank" >RIV/60461373:22310/22:43923888 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22320/22:43923888 RIV/26722445:_____/22:N0000035

Výsledek na webu

<a href="https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1567" target="_blank" >https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1567</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13168/cs.2022.0017" target="_blank" >10.13168/cs.2022.0017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of high-temperature inert gas atmosphere on the thermal stability of advanced refractory materials

Popis výsledku v původním jazyce

The effect of long-term exposure to a high-temperature gas atmosphere on the stability of ceramic materials has been investigated. Samples of materials based on ZrO2 (Zr85, Zr95), Al2O3 (Al100), Al2O3-SiO2 (Al63, Al70, Al76, Al96) and SiC (Si100) were exposed to an atmosphere of dry helium and nitrogen (the dew point of water was approximately −70 °C) at the temperature of 900 °C for 1000 hours. Bending-strength tests at 20 and Hot modulus of rupture (HMOR) tests at 900 °C were performed on exposed and unexposed samples. In addition, the chemical composition of the materials tested and their criteria of relative density, i.e. bulk density, apparent porosity and water absorption, were determined together with their changes after material exposure. The most pronounced change in bending strength at 20 °C was observed after the exposure of Zr95 to nitrogen, with an increase of up to approximately 25 % from the initial state. At 900 °C, the bending strength increased by about 15–20 % for Zr95 and Zr85 after exposure to helium and nitrogen. On the other hand, when Al63 was exposed to helium and nitrogen at 900 °C, its bending strength decreased. There were no substantial changes in the bending strength of the other materials tested after the exposure. Also, the exposure did not have a significant effect on the change in the criteria of relative density or chemical composition of any of the materials tested.

Název v anglickém jazyce

Effect of high-temperature inert gas atmosphere on the thermal stability of advanced refractory materials

Popis výsledku anglicky

The effect of long-term exposure to a high-temperature gas atmosphere on the stability of ceramic materials has been investigated. Samples of materials based on ZrO2 (Zr85, Zr95), Al2O3 (Al100), Al2O3-SiO2 (Al63, Al70, Al76, Al96) and SiC (Si100) were exposed to an atmosphere of dry helium and nitrogen (the dew point of water was approximately −70 °C) at the temperature of 900 °C for 1000 hours. Bending-strength tests at 20 and Hot modulus of rupture (HMOR) tests at 900 °C were performed on exposed and unexposed samples. In addition, the chemical composition of the materials tested and their criteria of relative density, i.e. bulk density, apparent porosity and water absorption, were determined together with their changes after material exposure. The most pronounced change in bending strength at 20 °C was observed after the exposure of Zr95 to nitrogen, with an increase of up to approximately 25 % from the initial state. At 900 °C, the bending strength increased by about 15–20 % for Zr95 and Zr85 after exposure to helium and nitrogen. On the other hand, when Al63 was exposed to helium and nitrogen at 900 °C, its bending strength decreased. There were no substantial changes in the bending strength of the other materials tested after the exposure. Also, the exposure did not have a significant effect on the change in the criteria of relative density or chemical composition of any of the materials tested.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

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

2022

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

66

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

228-235

Kód UT WoS článku

000795502800001

EID výsledku v databázi Scopus

2-s2.0-85129691965