Evolution of carbon and oxygen concentration in tungsten prepared by field assisted sintering and its effect on ductility

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10248447" target="_blank" >RIV/61989100:27360/21:10248447 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/21:00542799 RIV/61389021:_____/21:00542799 RIV/68407700:21340/21:00347691

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0263436821000317?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263436821000317?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmhm.2021.105499" target="_blank" >10.1016/j.ijrmhm.2021.105499</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of carbon and oxygen concentration in tungsten prepared by field assisted sintering and its effect on ductility

Popis výsledku v původním jazyce

Good thermal conductivity, high-temperature strength and low tritium retention favour the use of tungsten as a plasma facing material for fusion reactors. However, high ductile-to-brittle transition temperature (DBTT) of tungsten limits its application. The most viable way of industrial-scale tungsten production is powder metallurgy. Conventional methods use high temperatures and long dwell times. However, this can degrade the mechanical properties of tungsten due to excessive grain growth. Therefore, new sintering techniques and unconventional sintering parameters are explored. The aim is to achieve less demanding single step processing method with the potential to improve mechanical properties. In this study, pure tungsten samples were prepared by Field Assisted Sintering using different dwell times, atmospheres and foils. The effect of the parameters on the impurity concentration was analysed and the mechanical behaviour was evaluated using stress-strain analysis. Significant improvement in mechanical performance has been reached for short dwell times (2 min) and vacuum or Ar + H2 atmosphere.

Název v anglickém jazyce

Evolution of carbon and oxygen concentration in tungsten prepared by field assisted sintering and its effect on ductility

Popis výsledku anglicky

Good thermal conductivity, high-temperature strength and low tritium retention favour the use of tungsten as a plasma facing material for fusion reactors. However, high ductile-to-brittle transition temperature (DBTT) of tungsten limits its application. The most viable way of industrial-scale tungsten production is powder metallurgy. Conventional methods use high temperatures and long dwell times. However, this can degrade the mechanical properties of tungsten due to excessive grain growth. Therefore, new sintering techniques and unconventional sintering parameters are explored. The aim is to achieve less demanding single step processing method with the potential to improve mechanical properties. In this study, pure tungsten samples were prepared by Field Assisted Sintering using different dwell times, atmospheres and foils. The effect of the parameters on the impurity concentration was analysed and the mechanical behaviour was evaluated using stress-strain analysis. Significant improvement in mechanical performance has been reached for short dwell times (2 min) and vacuum or Ar + H2 atmosphere.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-18392S" target="_blank" >GA20-18392S: Modifikace teplotní stability slitin na bázi W-Cr pro aplikaci ve fúzních reaktorech</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Refractory Metals and Hard Materials

ISSN

0263-4368

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000638214500011

EID výsledku v databázi Scopus

2-s2.0-85100907090