Flexural strength of ceramic materials exposed to Pb-16Li at elevated temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000018" target="_blank" >RIV/26722445:_____/24:N0000018 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0920379624003661" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920379624003661</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fusengdes.2024.114513" target="_blank" >10.1016/j.fusengdes.2024.114513</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flexural strength of ceramic materials exposed to Pb-16Li at elevated temperatures

Popis výsledku v původním jazyce

Flow channel inserts (FCI) are functional components designed to minimize the magnetohydrodynamic pressure drop and also serve as a thermal and tritium permeation barrier. In the simplified design of the FCI component, the ceramic is directly exposed to contact with Pb-16Li at elevated temperature. As the FCI must withstand mechanical stresses resulting from the thermal gradient during the demanding operation, the assessment of mechanical response of ceramic in contact with Pb-16Li is essential. Pristine Al2O3 and SiSiC were subjected to three-point bending at room temperature and at 650 °C in argon. While SiSiC showed no change in flexural strength at both temperatures, flexural strength of Al2O3 decrease when the test temperature was increased. Inspection of the fracture surfaces revealed mixture of intergranular and transgranular brittle fracture for both materials in investigated temperature range. Pre-exposed samples were tested at 650 °C in liquid Pb-16Li to assess the effect of mechanical strength degradation caused by Pb-16Li. Testing of the pre-exposed Al2O3 samples showed the similar flexural strengths to the unexposed ones. In the case of SiSiC, the sample exposure resulted in decrease of the flexural strength. The analysis of the pre-exposed tested samples revealed deteriorated surface by Pb-16Li only in the case of SiSiC.

Název v anglickém jazyce

Flexural strength of ceramic materials exposed to Pb-16Li at elevated temperatures

Popis výsledku anglicky

Flow channel inserts (FCI) are functional components designed to minimize the magnetohydrodynamic pressure drop and also serve as a thermal and tritium permeation barrier. In the simplified design of the FCI component, the ceramic is directly exposed to contact with Pb-16Li at elevated temperature. As the FCI must withstand mechanical stresses resulting from the thermal gradient during the demanding operation, the assessment of mechanical response of ceramic in contact with Pb-16Li is essential. Pristine Al2O3 and SiSiC were subjected to three-point bending at room temperature and at 650 °C in argon. While SiSiC showed no change in flexural strength at both temperatures, flexural strength of Al2O3 decrease when the test temperature was increased. Inspection of the fracture surfaces revealed mixture of intergranular and transgranular brittle fracture for both materials in investigated temperature range. Pre-exposed samples were tested at 650 °C in liquid Pb-16Li to assess the effect of mechanical strength degradation caused by Pb-16Li. Testing of the pre-exposed Al2O3 samples showed the similar flexural strengths to the unexposed ones. In the case of SiSiC, the sample exposure resulted in decrease of the flexural strength. The analysis of the pre-exposed tested samples revealed deteriorated surface by Pb-16Li only in the case of SiSiC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/9D22001" target="_blank" >9D22001: Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Fusion Engineering and Design

ISSN

0920-3796

e-ISSN

1873-7196

Svazek periodika

204

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

5

Strana od-do

1-5

Kód UT WoS článku

001244892600001

EID výsledku v databázi Scopus

2-s2.0-85193568793