Air Oxidation Behavior of Sanicro-25 with Different Surface Finishes

IF 2.2 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Engineering and Performance Pub Date : 2024-10-16 DOI:10.1007/s11665-024-10042-3

Ch. Jagadeeswara Rao, M. Aishwarya, Avinash Kumar, P. Thilagavathy, S. Ningshen

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Abstract

Sanicro-25 is a high-temperature material used as the structural material for steam superheaters and reheaters in advanced ultra-supercritical power plants. The air oxidation behavior of Sanicro-25 with various surface roughnesses is being assessed at 650 °C for about 1000 h. Different surface-roughened samples were studied, namely polishing the sample up to diamond finish, grinding up to (80-grit finish and 600-grit finish) and grit blasted. The diamond finish sample showed more weight gain than others, and higher weight gain was observed in the initial oxidation stage. Attributed to different surface preparations leads to defects at different levels, which further alters the diffusion of various elements. The diamond finish sample showed the presence of Cr-rich oxides, and other samples showed the presence of Fe-rich oxides. Smooth surfaces promoted the formation of thick protective oxide scales.

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不同表面处理的 Sanicro-25 在空气中的氧化行为

Sanicro-25 是一种高温材料，在先进的超超临界发电厂中用作蒸汽过热器和再热器的结构材料。研究了不同表面粗化样品，即抛光至金刚石表面、研磨至（80 级表面和 600 级表面）和喷砂。与其他样品相比，金刚石表面处理样品的重量增加更多，而且在初始氧化阶段观察到的重量增加也更多。不同的表面处理工艺会导致不同程度的缺陷，从而进一步改变各种元素的扩散。金刚石表面处理样品显示存在富含铬的氧化物，而其他样品则显示存在富含铁的氧化物。光滑的表面促进了厚厚的保护性氧化物鳞片的形成。

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来源期刊

Journal of Materials Engineering and Performance 工程技术-材料科学：综合

CiteScore

3.90

自引率

13.00%

发文量

1120

审稿时长

4.9 months

期刊介绍： ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance. The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication. Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered