An interesting oxidation-reduction phenomenon between the Zr(Cr,Fe)2 Laves phase and Cr2O3 under high temperature

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-04-15 Epub Date: 2025-01-28 DOI:10.1016/j.corsci.2025.112751

Kejian Wei , Jiahong Wei , Guoqin Cao , Gang Cheng , Weihua Li , Junhua Hu , Sho Kano , Hiroaki Abe

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Abstract

Studying Zr(Cr, Fe)₂ Laves phase oxidation is vital for deepening our understanding of the oxidation mechanism of accident tolerant fuel (ATF) Cr-coated Zr and Zr-based alloys. Here, an interesting oxidation phenomenon of Zr(Cr, Fe)₂ Laves phase was confirmed for the first time. Meanwhile, this oxidation was accompanied by the Cr₂O₃ reduction. The lattice oxygen was transferred from Cr₂O₃ to Zr(Cr, Fe)₂ Laves phases, and Cr₂O₃ was transformed into Cr while Zr(Cr, Fe)₂ was oxidized into m-ZrO₂, Cr and Fe. The reaction Gibbs Free energy (△_r

G_{m}^{Θ}

) value is around −980 kJ/mol without considering Fe, which verifies the feasibility of this interesting oxidation-reduction phenomenon.

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Zr(Cr,Fe)2 Laves相与Cr2O3在高温下发生了有趣的氧化还原现象

研究Zr(Cr, Fe)2 Laves相氧化对加深对耐事故燃料（ATF） Cr包覆Zr及Zr基合金氧化机理的认识具有重要意义。本文首次证实了Zr(Cr, Fe)2 Laves相的氧化现象。同时，氧化过程还伴随着Cr2O3的还原。晶格氧由Cr2O3转移到Zr(Cr, Fe)2 Laves相，Cr2O3转化为Cr， Zr(Cr, Fe)2氧化为m-ZrO2、Cr和Fe。在不考虑铁的情况下，反应的吉布斯自由能（△rGmΘ）值约为−980 kJ/mol，验证了这一有趣的氧化还原现象的可行性。

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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.