Study of the Incorporation of SiC Microfibers and Their Effect on Adherence at the Interface of a NiCoCrAlY-7YSZ Thermal Barrier Coating

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

Oxidation of Metals Pub Date : 2023-08-29 DOI:10.1007/s11085-023-10177-z

Gabriel Israel Vásquez Hernández, Marco Aurelio González Albarrán, Eduardo Rodríguez de Anda, José de Jesús Ibarra Montalvo, J. C. Díaz Guillén, Jorge Manuel Chávez Aguilar

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Abstract

The present work studied the effect of the addition of SiC microfibers and their influence on interfacial adherence of NiCoCrAlY-7YSZ thermal barrier coatings (TBCs) systems. Two different coatings were fabricated (with and without the addition of SiC microfibers) and exposed to isothermal oxidation heat treatments (OHT) at 950 °C from 50 to 200 h. The microstructure and pull-off test evaluations showed that coatings reinforced with SiC possess a thinner thermally grown oxide (TGO) layer, suggesting an improvement in the oxidation resistance of these samples. In this sense, the coating with SiC also displayed better adherence resistance after 50 and 200 h of exposure. On the other hand, after the pull-off tests, reinforced samples showed a lower percentage of fracture. The above indicates that SiC microfibers enhance the interfacial adherence between the TGO and the ceramic layer (TC) by forming complex oxides resulting from the self-healing reaction mechanism.

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掺入碳化硅微纤维及其对 NiCoCrAlY-7YSZ 隔热涂层界面附着力影响的研究

本研究探讨了添加碳化硅微纤维的效果及其对 NiCoCrAlY-7YSZ 热障涂层（TBC）体系界面附着力的影响。微观结构和拉拔测试评估结果表明，添加了碳化硅的涂层具有更薄的热生长氧化物（TGO）层，这表明这些样品的抗氧化性得到了改善。从这个意义上说，经过 50 小时和 200 小时的暴露后，使用碳化硅的涂层也显示出更好的耐附着性。另一方面，在拉拔测试后，强化样品的断裂率较低。以上表明，SiC 微纤维通过自修复反应机制形成的复合氧化物，增强了 TGO 与陶瓷层 (TC) 之间的界面附着力。

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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.