Number of the records: 1
Evolution of carbon and oxygen concentration in tungsten prepared by field assisted sintering and its effect on ductility
- 1.
SYSNO ASEP 0542799 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Evolution of carbon and oxygen concentration in tungsten prepared by field assisted sintering and its effect on ductility Author(s) Veverka, Jakub (UFP-V) ORCID
Vilémová, Monika (UFP-V) RID, ORCID
Chlup, Zdeněk (UFM-A) RID, ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Lukáč, František (UFP-V) ORCID
Csáki, Štefan (UFP-V) ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Vontorová, J. (CZ)
Chráska, Tomáš (UFP-V) RID, ORCIDNumber of authors 9 Article number 105499 Source Title International Journal of Refractory Metals & Hard Materials. - : Elsevier - ISSN 0263-4368
Roč. 97, June (2021)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords Carbon concentration ; Ductile behaviour ; Oxygen concentration ; Sintering atmosphere ; Sintering foil ; Spark plasma sintering ; Stress-strain ; Tungsten Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Physics of Materials - Materials Fatigue, Friction Mechanics R&D Projects GA20-18392S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 ; UFM-A - RVO:68081723 UT WOS 000638214500011 EID SCOPUS 85100907090 DOI 10.1016/j.ijrmhm.2021.105499 Annotation 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 + H atmosphere. 2 Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S0263436821000317?via%3Dihub
Number of the records: 1