揭示双相铀铌合金异常降解的机理

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-11-06 DOI:10.1016/j.corsci.2024.112559

Licheng Chen, Yawen Zhao, Xianglin Chen, Hefei Ji, Bin Su, Piheng Chen, Xiaolin Wang

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引用次数: 0

摘要

铌被引入铀中以增强金属铀的耐腐蚀性，而双相铀铌合金在氢腐蚀下表现出异常降解。为了解其内在机理，我们采用高分辨率透射电子显微镜（HRTEM）和密度泛函理论（DFT）计算来表征双相铀铌合金中的相界面结构及其与氢和空位的相互作用。结合氢在双相 U-Nb 合金两相中的不同行为，我们提出了一种导致所观察到的异常降解的机制，而氢化物在双相 U-Nb 合金中的特殊分布也证实了这一点。

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Insight into the mechanism of abnormal degradation of duplex U-Nb alloy

Niobium is introduced to uranium to enhance the corrosion resistance of metallic uranium, while duplex U-Nb alloy exhibits anomalous degradation to hydrogen corrosion. To understand the underlying mechanism, we employed high-resolution transmission electron microscopy (HRTEM) and density functional theory (DFT) calculations to characterize the structure of the phase interface in duplex U-Nb alloy and its interaction with hydrogen and vacancy. Combined with the different behaviors of hydrogen in the two phases of the duplex U-Nb alloy, a mechanism contributing to the observed abnormal degradation is proposed, corroborated by the special distribution of hydride within the duplex U-Nb alloy.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.