Corrosion-resistant materials for liquid LiPb fusion blanket in elevated temperature operation. (1st April 2022)

• Record Type: Journal Article
• Authors: Kondo, Masatoshi; Hatakeyama, Susumu; Oono, Naoko; Nozawa, Takashi
• Is Part Of: Corrosion science. Volume 197(2022)
• Publication Date: 2022-04-01
• Subjects: Liquid metal -- ODS -- FeCrAl alloy -- CVD-SiC -- Oxide layer -- γ-LiAlO2; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.110070
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The corrosion tests of CVD-SiC, FeCrAl alloy (APMT, Fe-22Cr-5Al) and ODS FeCrAlZr alloy (NF12, Fe-11.6Cr-6.2Al) were performed in liquid LiPb up to 1173 K for 250 h. High-purity LiPb was synthesized by melting and mixing of Pb and Li granules at 623 K under vacuum condition. CVD-SiC revealed corrosion resistance, though SiC chemically reacted with impurities dissolved in liquid LiPb and formed complex oxides. The α-Al2 O3 layer which was formed on the surfaces of the FeCrAl alloys by the pre-oxidation treatment chemically reacted with liquid LiPb at 1023 K and 1173 K, and the layer chemically transformed into γ-LiAlO2 . Highlights: High- purity LiPb was synthesized by melting and mixing of Pb and Li grains under vacuum condition. CVD-SiC revealed corrosion resistance in liquid LiPb up to 1173 K, though it was slightly corroded by oxide formation . γ-LiAlO2 layer was formed on the surface of FeCrAl alloys in liquid LiPb, and the oxide layer improved their corrosion resistance. α-Al2 O3 layer which was formed by the pre-oxidation treatment reacted with liquid LiPb and transformed into γ-LiAlO2 .