Hydrogen Interaction with Deep Surface Modified Zr-1Nb Alloy by High Intensity Ti Ion Implantation

Kashkarov, Egor; Ryabchikov, A. I.; Kurochkin, A. V.; Сыртанов, М. С.; Shevelev, A. É.; Obrosov, Aleksei; Weiß, Sabine

doi:10.3390/met8121081

Cited by 4 publications

(2 citation statements)

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“…In terms of the model shown in Figure 2, the boundary conditions for Equation (7) can be expressed by Equations (8) and 9:…”

Section: Diffusion Coefficient Of Oxygen In Oxide Filmmentioning

confidence: 99%

“…Zirconium (Zr) alloys are widely used as fuel claddings in nuclear reactors due to their adequate mechanical properties, low neutron absorption rate, and excellent corrosion resistance in service environments [1][2][3][4]. Among these properties, corrosion resistance is one of the most important considerations, as corrosion limits the service life of Zr alloys and is related to the safety of nuclear reactors [5][6][7][8]. When used in environments with high temperature and high pressure, Zr alloys react with H 2 O (aqueous solution or steam) and are oxidized [6].…”

Section: Introductionmentioning

confidence: 99%

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Calculation of Oxygen Diffusion Coefficients in Oxide Films Formed on Low-Temperature Annealed Zr Alloys and Their Related Corrosion Behavior

Zhang

Chen

Zhao³

et al. 2019

Metals

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The growth of oxide film, which results from the inward oxygen diffusion from a corrosive environment, is a critical consideration for the corrosion resistance of zirconium alloys. This work calculates the oxygen diffusion coefficients in the oxide films formed on zirconium alloys annealed at 400~500 °C and investigates the related corrosion behavior. The annealed samples have a close size for the second-phase particles but a distinctive hardness, indicating the difference in substrate conditions. The weight gain of all samples highly follows parabolic laws. The weight gain of the sample annealed at 400 °C has the fastest increase rate at the very beginning of the corrosion test, but its oxide film has the slowest growth rate as the corrosion proceeds. By contrast, the sample annealed at 500 °C shows the lowest weight gain but the highest corrosion rate constant. Such a corrosion behavior is attributed to the amount of defects existing in the oxide film formed on the annealed samples; fewer defects would provide a lower fraction of short-circuit diffusion in total diffusion, resulting in a lower diffusion coefficient of oxygen in the oxide film, thereby producing better corrosion resistance. This is consistent with the calculated diffusion coefficients of oxygen in the oxide films: 3.252 × 10−11 cm2/s, 3.464 × 10−11 cm2/s and 3.740 × 10−11 cm2/s for the samples annealed at 400 °C, 450 °C, and 500 °C, respectively.

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“…In terms of the model shown in Figure 2, the boundary conditions for Equation (7) can be expressed by Equations (8) and 9:…”

Section: Diffusion Coefficient Of Oxygen In Oxide Filmmentioning

confidence: 99%