AlCrFeCoNi2.1 EHEA合金在高温下相变介导的高温氧化

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-04-01 Epub Date: 2025-01-02 DOI:10.1016/j.corsci.2025.112674

Yiwen Chen , Shuo Ma , Jiang Ju , Kai Chen , Jingya Wang , Zhao Shen , Xiaoqin Zeng

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引用次数: 0

摘要

研究了AlCrFeCoNi2.1共晶高熵合金（EHEA）在800℃空气中的氧化行为。在稳态氧化条件下，氧化垢主要表现为连续致密的Al2O3层，穿插着块状的Fe2O3和Cr2O3层。在原始表面下，由于Al2O3形成过程中Al的大量消耗，从BCC到FCC的相变形成了一个单一的FCC基体层。这种独特的双层结构，包括一个基于al2o3的氧化层和一个贫al的FCC基体层，显著提高了合金的氧化性能。

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Phase transformation-mediated high-temperature oxidation in an AlCrFeCoNi2.1 EHEA alloy at elevated temperature

The oxidation behavior of an AlCrFeCoNi_2.1 eutectic high-entropy alloy (EHEA) at 800 ℃ in air was meticulously examined. Under steady-state oxidation conditions, the oxide scale predominantly features a continuous and dense Al₂O₃ layer, interspersed with blocky Fe₂O₃ and Cr₂O₃ formations. Beneath the original surface, a single FCC matrix layer emerges due to a phase transition from BCC to FCC, driven by the extensive consumption of Al in the formation of Al₂O₃. This unique duplex-layer structure, comprising an Al₂O₃-based oxide scale and an Al-depleted FCC matrix layer, markedly enhances the oxidation performance of the 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.