Mechanical and Electrochemical Behavior of CNT-Reinforced YSZ Coating

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

Oxidation of Metals Pub Date : 2024-02-03 DOI:10.1007/s11085-024-10223-4

Chaithanya Kalangi, Mahidhar Reddy Veeram

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Abstract

Thermally sprayed ceramic coatings with varied weight percentages of carbon nanotube (CNT) reinforcement were examined. AISI 1020 steel was coated with yttria-stabilized zirconia (ZrO₂ + 8% Y₂O₃) using the atmospheric plasma spraying (APS) method. The study examined the CNT dispersion in the coating microstructure and evaluated the porosity, bond strength, and corrosion resistance of the coating. In addition, the coating thicknesses were measured. The coatings were characterized using a variety of techniques, including optical microscopy, scanning electron microscopy, image analysis, bond strength testing, and corrosion analysis. According to the findings, adding CNTs to the coatings improved their mechanical characteristics, particularly their hardness and wear resistance. Notably, the best levels of hardness and wear resistance were seen in coatings with a 5 percent CNT reinforcement. Additionally, the coatings' corrosion resistance was enhanced by the inclusion of CNTs. The results of this work show that the mechanical and corrosion properties of thermally sprayed ceramic coatings can be successfully improved by the inclusion of CNTs. This means that these CNT-reinforced coatings have a lot of potential for a variety of applications, such as wear-resistant, corrosion-resistant, and thermal barrier coatings.

Abstract Image

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CNT 增强 YSZ 涂层的机械和电化学行为

研究了具有不同重量百分比碳纳米管 (CNT) 增强层的热喷涂陶瓷涂层。采用大气等离子喷涂 (APS) 方法在 AISI 1020 钢上喷涂了钇稳定氧化锆（ZrO2 + 8% Y2O3）。研究考察了涂层微结构中的 CNT 分散情况，并评估了涂层的孔隙率、结合强度和耐腐蚀性。此外，还测量了涂层厚度。涂层的表征采用了多种技术，包括光学显微镜、扫描电子显微镜、图像分析、结合强度测试和腐蚀分析。研究结果表明，在涂层中添加碳纳米管可改善涂层的机械特性，尤其是硬度和耐磨性。值得注意的是，硬度和耐磨性最好的是添加了 5% 碳纳米管的涂层。此外，CNT 的加入还增强了涂层的耐腐蚀性。这项工作的结果表明，加入碳纳米管可成功改善热喷涂陶瓷涂层的机械性能和耐腐蚀性能。这意味着这些 CNT 增强涂层在耐磨、耐腐蚀和热障涂层等多种应用领域具有很大的潜力。

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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.