Interactions between alloy elements and oxygen at the steel–liquid LBE interface determined from first-principles molecular dynamics simulations

文献信息

发布日期 2019-11-04
DOI 10.1039/C9CP05626B
影响因子 3.676
作者

Wenyi Ding, Zhizhong Jiang, Jingping Xin, Min Zhang, Mingjie Zheng


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摘要

Lead bismuth eutectic (LBE) alloy shows high potential for application in advanced nuclear systems such as lead-alloy-cooled fast reactors. However, high-temperature LBE liquid is prone to corrode the reference containment material, typically made of steel, through a process known as liquid metal corrosion. In this work, an extensive set of first-principles calculations was performed to investigate the diffusion behavior of steel alloy elements and O in liquid LBE. The results showed Bi atoms diffusing a little bit faster than Pb atoms, and the Ni atoms in steel being most likely to dissolve into the LBE. Compared to Cr atoms, Fe atoms were calculated to diffuse more slowly, and Ni atoms more rapidly. In the presence of Al and/or Si, Al–O and Si–O pairs were calculated to be more stable than Fe–O/Cr–O pairs and to be inclined to form protective stable Al/Si related oxides. The Ni–O distance and pair formation energy in LBE indicated the Ni–O pair to be inclined to decompose over a period of time. We expect these data to be used as indispensable information for understanding the dissolution and oxidation corrosion behavior of steels in liquid LBE.

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Contents

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来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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