1350℃时Zr- cr共晶组织的演变及其对cr包覆Zr合金氧化机理的影响

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-03-12 DOI:10.1016/j.surfin.2025.106221

Shuai Wang, Baiming Yao, Weidong Zhai, Ziyi Li, Jishen Jiang, Xianfeng Ma

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引用次数: 0

摘要

研究了Zr- cr共晶组织的形成、演化、向内迁移及其对1350℃时cr包覆Zr合金氧化行为的影响。氧化120 s后，界面处初步形成板条状共晶结构，随后缓慢向内迁移。氧化超过180s后，涂层失去保护，共晶组织由板条状转变为枝晶状。Zr-Cr共晶液体的迁移距离呈抛物线状分布，近似等于ZrO2和α-Zr(O)层的总厚度。共晶反应加剧了Cr涂层的消耗和厚度不均，从而降低了Cr涂层的整体防护性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Evolution of the Zr-Cr eutectic structure and its effect on the oxidation mechanism of Cr-coated Zr alloy at 1350 °C

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Evolution of the Zr-Cr eutectic structure and its effect on the oxidation mechanism of Cr-coated Zr alloy at 1350 °C

The formation, evolution, and inward migration of the Zr-Cr eutectic structure and its influence on the oxidation behavior of the Cr-coated Zr alloy at 1350 °C were investigated. The lath-shaped eutectic structure was initially formed at the interface after oxidation for 120 s, followed by slow inward migration. After oxidation beyond 180 s, the coating lost its protection and the eutectic structure transformed from lath-shaped into dendrite-shaped. The migration distance of the Zr-Cr eutectic liquid exhibited parabolic-like distribution and was approximately equivalent to the combined thickness of the ZrO₂ and α-Zr(O) layers. The eutectic reaction aggravated the consumption and uneven thickness of the Cr coating, thereby reducing its overall protective performance.

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)