Stability of the interfaces in advanced tungsten materials for high temperature environments
Project ID:GA17-23154S
Provider:Czech Science Foundation
Period:Jan 01, 2017 - Dec 31, 2019
Principal Investigator:Ing. Jiří Matějíček, Ph.D.
Co-investigatorsM. Vilémová, B. Nevrlá, T. Chráska, K. Illková, J. Veverka, J. Klečka, F. Lukáč

Aims of the project: Tungsten is a prime candidate for application in plasma facing components of future fusion power plant. Besides high melting point, tungsten has the advantage of low sputtering yield and low tritium retention. On the other hand, among the most serious tungsten disadvantages belongs high ductile to brittle transition temperature, degradation of mechanical properties at high temperatures and formation of WO3 in presence of oxygen. Thus, various tungsten alloys and tungsten with particle dispersion are currently developed with the aim to improve tungsten properties. The advanced tungsten materials will be used as the innermost wall of fusion vessel and thus will have to be joined to structural materials of the device. The resulting structure will be very complex and will contain interfaces of various characters - e.g. the interface between the advanced tungsten and structural material and high density of interfaces within the advanced multiphase tungsten materials. The purpose of this project is to study stability of the interfaces at steady state and transient heat loading.

Results:

Heuer S., Matějíček J., Vilémová M., Koller M., Illková K., Veverka J., Weber T., Pintsuk G., Coenen J.W., Linsmeier Ch.: Atmospheric plasma spraying of functionally graded steel/tungsten layers for the first wall of future fusion reactors. Surface and Coatings Technology 366 [25 May 2019] (2019) 170-178. [ Abstract ] [ Link ]

Vilémová M., Lukáč F., Veverka J., Illková K., Matějíček J.: Controlling the carbide formation and chromium depletion in W-Cr alloy during field assisted sintering. International Journal of Refractory Metals & Hard Materials 79 (2019) 217-223. [ Abstract ] [ Link ]

Heuer S., Weber T., Pintsuk G., Coenen J.W., Matějíček J., Linsmeier Ch.: Aiming at understanding thermo-mechanical loads in the first wall of DEMO: Stress–strain evolution in a Eurofer-tungsten test component featuring a functionally graded interlayer. Fusion Engineering and Design 135 [October] (2018) 141-153. [ Abstract ] [ Link ]

Tanure L., Bakaeva A., Lapeire L., Terentyev D., Vilémová M., Matějíček J., Verbeken K.: Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material. Surface and Coatings Technology 355 (2018) 252-258. [ Abstract ] [ Link ]
[International Conference on Surface Modification of Materials by Ion Beams. Lisbon, 09.07.2017-14.07.2017]

Klečka J., Matějíček J., Čížek J., Medřický J., Zlatník R.: Vliv výkonu hořáku a tlaku plynu na vlastnosti RF-ICP wolframových nástřiků. Vrstvy a povlaky 2018. Trenčianska Teplá: M-Press, 2018. ISBN 978-80-972133-3-6.
[Vrstvy a povlaky 2018. Rožnov pod Radhoštěm (CZ), 22.10.2018-23.10.2018]

Medřický J., Klečka J., Čížek J., Kovářík O., Matějíček J.: Měření teploty a rychlosti wolframových částic u systému s indukčně vázaným plazmatem. Vrstvy a povlaky 2018. Trenčianska Teplá: M-Press, 2018. ISBN 978-80-972133-3-6.
[Vrstvy a povlaky 2018. Rožnov pod Radhoštěm (CZ), 22.10.2018-23.10.2018]

Klečka J., Mušálek R., Vilémová M., Lukáč F.: On tungsten spraying using inductively coupled plasma system - First results. METAL 2017: 26th International Conference on Metallurgy and Materials: abstracts. Ostrava: Tanger Ltd., 2017, s. 1321-1326. ISBN 978-80-87294-73-4. [ Abstract ]
[26th International Conference on Metallurgy and Materials. Brno (CZ), 24.05.2017-26.05.2017]