Influence of Water Vapor and Local Gas Velocity on the Oxidation Kinetics of In625 at 900 °C: Experimental Study and CFD Gas Phase Simulation

IF 2.1 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Oxidation of Metals Pub Date : 2024-09-19 DOI:10.1007/s11085-024-10307-1
Guillaume Duthoit, Aurélie Vande Put, Brigitte Caussat, Hugues Vergnes, Daniel Monceau
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Abstract

The effect of water vapor content on the oxidation behavior of In625 at 900 °C in synthetic air was reported. The higher the water vapor content, the greater the oxidation and volatilization rates were. Increasing the water vapor content led to an increase in the proportion of spinel and rutile-type oxides in the oxide scale compared to chromia, and the proportion of Al-rich oxides within the alloy. A kp-kv mass variation model was used to quantify the experimental results, and Fluent Ansys® CFD simulations of the gas phase were used to predict volatilization rates. CFD simulations were used to calculate local gas velocity, temperature and composition along with local volatilization rates at each point on the sample surface. It was possible to explain not only the variations in volatilization between upstream and downstream samples, but also the increased volatilization at sample corners. For longer durations, it was shown experimentally that the rate of volatilization decreases. This was explained by the enrichment of the oxide scale with spinel and rutile-type oxides.

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水蒸气和局部气体速度对 In625 在 900 °C 下氧化动力学的影响:实验研究与 CFD 气相模拟
报告了水蒸气含量对 In625 在 900 °C 合成空气中氧化行为的影响。水蒸气含量越高,氧化率和挥发率越大。与铬相比,水蒸气含量的增加会导致氧化尺度中尖晶石和金红石型氧化物比例的增加,以及合金中富铝氧化物比例的增加。kp-kv 质量变化模型用于量化实验结果,气相的 Fluent Ansys® CFD 模拟用于预测挥发率。CFD 模拟用于计算样品表面各点的局部气体速度、温度和成分以及局部挥发率。不仅可以解释上游和下游样品之间挥发率的变化,还可以解释样品角落挥发率增加的原因。实验表明,持续时间越长,挥发率越低。这是因为氧化物鳞片中富含尖晶石和金红石型氧化物。
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来源期刊
Oxidation of Metals
Oxidation of Metals 工程技术-冶金工程
CiteScore
5.10
自引率
9.10%
发文量
47
审稿时长
2.2 months
期刊介绍: Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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