Flow Reactor Experiments of High-Temperature Graphite Oxidation and Nitridation

IF 2.1 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Oxidation of Metals Pub Date : 2024-07-25 DOI:10.1007/s11085-024-10253-y

Nicholas A. Anderson, Philip Zolfaghari, Souvik Bhattacharya, Lorenzo Capponi, Trey Oldham, R. Mohan Sankaran, Gregory S. Elliott, Francesco Panerai

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Abstract

Predicting the gas-surface interactions of solid carbon is necessary for the design of many engineering systems that employ graphite. Experimental determination of the reaction rates improves the fidelity of those predictions. Here, we studied oxidation and nitridation of graphite by thermal and nonthermal plasma assisted processes. Experiments were conducted at a pressure of 2 kPa, higher than previous flow reactor experiments of this kind and closer to the conditions experienced in engineering applications. At these higher pressures, the limitations of mass transport and the interference between oxygen and nitrogen species become important. Reaction rates were determined from mass loss, reaction products were identified with mass spectrometry, and surface roughening was characterized by electron microscopy.

Graphical Abstract

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高温石墨氧化和氮化的流动反应器实验

要设计许多使用石墨的工程系统，就必须预测固体碳的气体-表面相互作用。通过实验确定反应速率可以提高这些预测的准确性。在此，我们研究了热等离子体和非热等离子体辅助过程中石墨的氧化和氮化。实验是在 2 kPa 的压力下进行的，高于以往的此类流动反应器实验，更接近工程应用中的条件。在更高的压力下，质量传输的限制以及氧气和氮气之间的干扰变得非常重要。根据质量损失确定了反应速率，用质谱法鉴定了反应产物，并用电子显微镜对表面粗化进行了表征。

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来源期刊

Oxidation of Metals 工程技术-冶金工程

CiteScore

5.10

自引率

9.10%

发文量

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.