Thuan Dinh Nguyen, Jianqiang Zhang, David J. Young
{"title":"Microstructure of Cr2O3 Scales Grown in Ar-5H2O-(5H2) at 850 °C","authors":"Thuan Dinh Nguyen, Jianqiang Zhang, David J. Young","doi":"10.1007/s11085-024-10287-2","DOIUrl":null,"url":null,"abstract":"<div><p>Model alloy, Fe-20Cr (wt%), was oxidized in two gas mixtures Ar-5H<sub>2</sub>O-(5H<sub>2</sub>) (vol%) at 850 °C. The alloy formed Cr<sub>2</sub>O<sub>3</sub> scales in both gases. The Cr<sub>2</sub>O<sub>3</sub> scale developed faster in Ar-5H<sub>2</sub>O-5H<sub>2</sub> and contained fine pores, whilst that grown in Ar-5H<sub>2</sub>O was dense. Experiments with inert SiO<sub>2</sub> marker revealed that the Cr<sub>2</sub>O<sub>3</sub> scale growth in Ar-5H<sub>2</sub>O-(5H<sub>2</sub>) was controlled mainly by outward Cr diffusion. When adjusted for grain boundary diffusion effects, Wagner’s theory was successful in describing the hydrogen effect, provided that the Cr<sub>2</sub>O<sub>3</sub> scales are <i>n</i>-type.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"101 6","pages":"1277 - 1286"},"PeriodicalIF":1.5000,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-024-10287-2.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-024-10287-2","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
Model alloy, Fe-20Cr (wt%), was oxidized in two gas mixtures Ar-5H2O-(5H2) (vol%) at 850 °C. The alloy formed Cr2O3 scales in both gases. The Cr2O3 scale developed faster in Ar-5H2O-5H2 and contained fine pores, whilst that grown in Ar-5H2O was dense. Experiments with inert SiO2 marker revealed that the Cr2O3 scale growth in Ar-5H2O-(5H2) was controlled mainly by outward Cr diffusion. When adjusted for grain boundary diffusion effects, Wagner’s theory was successful in describing the hydrogen effect, provided that the Cr2O3 scales are n-type.
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.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
