Development of High Temperature Liquid Metal Resistant ODS Steels for Fission/Fusion Application
Project ID:GA20-20873S
Provider:Czech Science Foundation
Period:Jan 01, 2020 - Dec 31, 2022
Recipient -- coordinator:Institute of Physics of Materials of the CAS, v. v. i. -- Ing. Hynek Hadraba, Ph.D.
Co-recepient(s) / PI(s):Research Centre Rez -- Dr. RNDr. Anna Hojná
Institute of Plasma Physics, Czech Academy of Sciences, Prague -- Ing. Jan Čížek, Ph.D.
Co-investigators from IPPJ. Klečka, . Csáki, Z. Dlabáček, F. Lukáč

Aims of the project: Ferritic 9–16%Cr ODS steels are promising structural candidate material for future fusion/fission reactors. However, the planned usage of heavy liquid metals (Pb, PbLi) as cooling media triggers aggressive conditions for these steels. The former self-passivation strategy based on Cr oxide scale formation in the liquid metals enriched by oxygen fails for PbLi coolants as Li exhibits affinity to oxygen higher than Cr. A new generation of ODS steels prepared by complex oxide strengthening strategy (allowing e.g. control of the inherent grain size or the dispersion strengthening contribution to the yield strength) will be developed in the project. Further, protective coatings based on low-solubility hard pure metals will be developed. The exposure in liquid Pb/PbLi at high temperatures simulating the long-term effect of the working environment will be investigated. The aim is to understand the process of aging and degradation of the new ODS steels and their protective coating in the Pb/PbLi liquid media and to design a route for the further development of high-resistance ODS steels.

Results:

Hadraba H., Stratil L., Šiška F., Chlup Z., Čížek J., Jambor M., Bertolla L.: Grain size manipulation of the Eurofer steel via mechanical alloying. of Materials Science. e [Jun] (2024) 1-13. [ Abstract ] [ Link ]

Pazderova M., Hojná A., Hadraba H., Stratil L., Šiška F., Chocholoušek M., Bricín D., Čížek J.: Liquid lead resistance and cracking of novel 1Al-Sc-Y ODS Eurofer steel. Journal of Nuclear Materials 602 [DEC] (2024) č. článku 155306. [ Abstract ]

Hojná A., Pazderova M., Rozumová L., Vít J., Hadraba H., Stratil L., Čížek J.: Performance of Sc-Y-ODS variant of Eurofer steel in stagnant PbLi at 600?C. Journal of Nuclear Materials 575 [MAR] (2023) č. článku 154227. [ Abstract ] [ Link ]

Čížek J., Klečka J., Babka L., Mušálek R., Hadraba H., Kondás J., Singh R., Pazderova M.: Protective Mo and Fe Coatings by CS and RF-ICP for PbLi Coolant Environments in Generation IV Fission Reactors. Journal of Thermal Spray Technology 32 [2/3] (2023) 363-374. [ Abstract ] [ Link ]

Hadraba H., Chlup Z., Čížek J., Kuběna I.: 9Cr-1W steel strengthened by AlN and BN dispersion. Journal of Materials Science 57 [26] (2022) 12572-12584. [ Abstract ] [ Link ]