High temperature oxidation behavior and mechanism of MoNbVTa0.5Crx refractory high entropy alloys

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.2024.112672
Mingyi Guo , Liujie Xu , Yunchao Zhao , Shengqiang Deng , Zhou Li , Shizhong Wei
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Abstract

The oxidation behavior of MoNbVTa0.5Crx (x = 0.25–1) refractory high entropy alloys (RHEAs) at 800 ℃ was studied. The oxidation resistance of the alloy significantly increased with the increase of Cr content. Due to the formation of dense CrNbO4/CrTaO4 oxide layers, MoNbVTa0.5Cr alloy exhibited promising oxidation resistance, with a specific mass gain of 47.76 mg/cm2 after 36 h of oxidation in air at 1100 ℃. The oxidation kinetics of MoNbVTa0.5Cr alloy at 800–1100 ℃ conformed to parabolic kinetics, and the internal oxidation of alloys was mainly caused by the inward diffusion of oxygen. This study provides valuable reference for the development of antioxidant RHEAs.
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MoNbVTa0.5Crx难熔高熵合金的高温氧化行为及机理
研究了MoNbVTa0.5Crx (x = 0.25-1)耐火高熵合金(RHEAs)在800℃下的氧化行为。随着Cr含量的增加,合金的抗氧化性能显著提高。由于形成致密的CrNbO4/CrTaO4氧化层,在1100℃空气中氧化36 h后,MoNbVTa0.5Cr合金具有良好的抗氧化性能,比质量增益为47.76 mg/cm2。MoNbVTa0.5Cr合金在800 ~ 1100℃的氧化动力学符合抛物线型动力学,合金内部氧化主要是由氧向内扩散引起的。本研究为抗氧化剂RHEAs的开发提供了有价值的参考。
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来源期刊
Corrosion Science
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.
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