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CVD SiC samples exposed to 400 keV He ion irradiation at 750 °C were subsequently corroded in FLiNaK molten salt at 750 °C for 166 h. After corrosion, the dissolution of Si led to the formation of a carbon-rich layer and obvious denudation of the SiC. The microstructure of the C-rich layer was first visualized and characterized via TEM, confirming that a graphitic structure was present inside the layer. Furthermore, the AFM images indicate that the denudation depth increases with increasing irradiation dose. Moreover, the Ni impurities in the salt play a key role in the irradiation-promoted corrosion of SiC. These findings suggest that Ni can preferentially react with irradiation-included homonuclear Si‒Si bonds to promote SiC corrosion. Moreover, the number density of He bubbles decreases as their size increases near or within the C-rich layer, and it is speculated that the vacancies created by the loss of Si result in the migration and coalescence of He bubbles. In conclusion, irradiation and corrosion at high temperatures induced synergistic damage behavior in SiC.
Waldrop MM. Nuclear energy: Radical reactors. Nature 2012, 492: 26–29.
Muránsky O, Yang C, Zhu H, et al. Molten salt corrosion of Ni–Mo–Cr candidate structural materials for molten salt reactor (MSR) systems. Corros Sci 2019, 159: 108087.
Allen T, Busby J, Meyer M, et al. Materials challenges for nuclear systems. Mater Today 2010, 13: 14–23.
Koyanagi T, Katoh Y, Nozawa T, et al. Recent progress in the development of SiC composites for nuclear fusion applications. J Nucl Mater 2018, 511: 544–555.
Li M, Zhou XB, Yang H, et al. The critical issues of SiC materials for future nuclear systems. Scripta Mater 2018, 143: 149–153.
Liu GW, Zhang XZ, Yang J, et al. Recent advances in joining of SiC-based materials (monolithic SiC and SiCf/SiC composites): Joining processes, joint strength, and interfacial behavior. J Adv Ceram 2019, 8: 19–38.
Yu T, Xu J, Zhou XB, et al. Near-seamless joining of Cf/SiC composites using Y3Si2C2 via electric field-assisted sintering technique. J Adv Ceram 2022, 11: 1196–1207.
Liu M, Gong HF, Liu WG, et al. Effects of He on the recrystallization and Mg diffusion in Mg ion implanted CVD-SiC. J Nucl Mater 2021, 545: 152747.
Yoder GL, Aaron A, Cunningham B, et al. An experimental test facility to support development of the fluoride-salt-cooled high-temperature reactor. Ann Nucl Energy 2014, 64: 511–517.
Gu YF, Liu JX, Wang Y, et al. Corrosion behavior of TiC–SiC composite ceramics in molten FLiNaK salt. J Eur Ceram Soc 2017, 37: 2575–2582.
Wang Y, Tang ZF, Fu Y, et al. Corrosion behavior of ZrC–SiC composite ceramics in LiF–NaF–KF molten salt at high temperatures. Ceram Int 2015, 41: 12996–13005.
Liu M, Li QQ, Hui J, et al. Repelling effects of Mg on diffusion of He atoms toward surface in SiC: Irradiation and annealing experiments combined with first-principles calculations. J Adv Ceram 2023, 12: 2284–2299.
Daghbouj N, Li BS, Callisti M, et al. Microstructural evolution of helium-irradiated 6H–SiC subjected to different irradiation conditions and annealing temperatures: A multiple characterization study. Acta Mater 2019, 181: 160–172.
Idris MI, Yoshida K, Yano T. Radiation damage analysis in SiC microstructure by transmission electron microscopy. Nucl Eng Technol 2022, 54: 991–996.
Li BS, Zhang C, Liu HP, et al. Microstructural and elemental evolution of polycrystalline α-SiC irradiated with ultra-high-fluence helium ions before and after annealing. Fusion Eng Des 2020, 154: 111511.
Li JJ, Yan L, Huang HF, et al. Corrosion behavior of ion-irradiated SiC in FLiNaK molten salt. Corros Sci 2020, 163: 108229.
Li JJ, Huang HF, Huang Q, et al. Effect of irradiation damage on corrosion of 4H-SiC in FLiNaK molten salt. Corros Sci 2017, 125: 194–197.
Wang HD, Feng Q, Wang Z, et al. Microstructure evolution and high-temperature mechanical properties of SiCf/SiC composites in liquid fluoride salt environment. Corros Sci 2017, 124: 131–137.
Yang XM, Liu M, Gao YT, et al. Effect of oxygen on the corrosion of SiC in LiF–NaF–KF molten salt. Corros Sci 2016, 103: 165–172.
Xue WD, Yang XM, Zhou XT, et al. Effect of concentration of Cr3+ in LiF–NaF–KF salt on the corrosion of SiC. J Nucl Mater 2018, 509: 527–531.
Wang XD, Yang XM, Hu MM, et al. Effect of temperature on the interaction between CVD SiC ceramic and nickel-based alloy in molten LiF–NaF–KF salt. Corros Sci 2023, 216: 111075.
Xi JQ, Jiang H, Liu C, et al. Corrosion of Si, C, and SiC in molten salt. Corros Sci 2019, 146: 1–9.
Wang HD, Feng Q, Wang Z, et al. The corrosion behavior of CVI SiC matrix in SiCf/SiC composites under molten fluoride salt environment. J Nucl Mater 2017, 487: 43–49.
Yang XM, Liu HJ, Wang XD, et al. Role of helium ion irradiation in the corrosion of CVD−SiC in molten LiF−NaF−KF salt. Corros Sci 2021, 182: 109287.
Agarwal S, Chen Q, Koyanagi T, et al. Revealing irradiation damage along with the entire damage range in ion-irradiated SiC/SiC composites using Raman spectroscopy. J Nucl Mater 2019, 526: 151778.
Li JJ, Huang HF, Lei GH, et al. Evolution of amorphization and nanohardness in SiC under Xe ion irradiation. J Nucl Mater 2014, 454: 173–177.
Wang HD, You X, Feng Q, et al. Effects of corrosion in liquid fluoride salt on the tensile strength of domestic SiC fibers. Ceram Int 2021, 47: 31268–31276.
Liu M, Yan YF, Zhu ZB, et al. Microstructural evolution, swelling and hardening of CVD-SiC induced by He ions irradiation at 650 ℃. Ceram Int 2023, 49: 1880–1887.
Li QQ, Li XY, Zhu ZB, et al. Evolution of microstructure and mechanical properties of SiCf/SiC composites induced by He ions irradiation at various temperatures. Ceram Int 2023, 49: 39449–39457.
Espinoza-Pérez LJ, Esquivel-Medina S, López-Honorato E. Influence of SiC microstructure on its corrosion behavior in molten FLiNaK salt. Ceram Int 2021, 47: 15527–15532.
Bai JJ, Li JJ, Fu CL, et al. Temperature dependence of He bubble evolution in UNS N10003 alloys under He ion irradiation. J Appl Phys 2021, 130: 155901.
Schmidt J, Scheiffele M, Crippa M, et al. Design, fabrication, and testing of ceramic plate-type heat exchangers with integrated flow channel design. Int J Appl Ceram Technol 2011, 8: 1073–1086.
Hu MM, Yang XM, Wang XD, et al. Corrosion behavior of pressureless sintered SiC in molten LiF–NaF–KF salt: Role of metallic impurities in the salt. Corros Sci 2022, 201: 110260.
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