核合金中机械和辐照诱发损伤的微结构解析电化学演化

IF 6.6 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY npj Materials Degradation Pub Date : 2024-08-19 DOI:10.1038/s41529-024-00500-7
Xin Chen, Marta Pozuelo, Maxim Gussev, Matthew Chancey, Yongqiang Wang, Magdalena Balonis, Mathieu Bauchy, Gaurav Sant
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引用次数: 0

摘要

需要进行高通量、规模相关和直接的电化学分析,以了解暴露在极端(高压、高温和辐照)环境中的核材料的腐蚀行为和敏感性。我们展示了扫描电化学电池显微镜 (SECCM) 的多尺度、多模式应用,以微观结构解析的方式对核合金的腐蚀变化进行电化学剖析。特别是,我们发现机械变形和辐照微结构都会降低电荷转移电阻,从而导致加速氧化。我们强调,机械变形和辐照的影响是协同的,实际上可能相互叠加,其影响包括一般、电化学和/或辐照激活的应力腐蚀开裂。综上所述,我们强调了非破坏性电化学检查的能力,以确定微观结构的改变如何导致核合金腐蚀倾向的变化:这些知识对核设施应用中合金的等级、资格和检查都有影响。
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Microstructurally resolved electrochemical evolution of mechanical- and irradiation-induced damage in nuclear alloys
There is a need for high-throughput, scale-relevant, and direct electrochemical analysis to understand the corrosion behavior and sensitivity of nuclear materials that are exposed to extreme (high pressure, temperature, and radiation exposure) environments. We demonstrate the multi-scale, multi-modal application of scanning electrochemical cell microscopy (SECCM) to electrochemically profile corrosion alterations in nuclear alloys in a microstructurally resolved manner. Particularly, we identify that both mechanically deformed and irradiated microstructures show reduced charge-transfer resistance that leads to accelerated oxidation. We highlight that the effects of mechanical deformation and irradiation are synergistic, and may in fact, superimpose each other, with implications including general-, galvanic-, and/or irradiation-activated stress-corrosion cracking. Taken together, we highlight the ability of non-destructive, electrochemical interrogations to ascertain how microstructural alterations result in changes in the corrosion tendency of a nuclear alloy: knowledge which has implications to rank, qualify and examine alloys for use in nuclear construction applications.
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来源期刊
npj Materials Degradation
npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
7.80
自引率
7.80%
发文量
86
审稿时长
6 weeks
期刊介绍: npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies
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