Effect of Graphene on High-Temperature Oxidation Behavior and Mechanism of NiAl Bond Coat

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2025-04-28 DOI:10.1007/s11666-025-01997-3

Yixin Li, Zihang Li, Jiayi Peng, Juncheng Wang, Zi Wang, Yan Wang, Liming Tan, Feng Liu

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Abstract

The existing metal bond coat is struggling with increasing demand for high thermal barrier coatings. To address this issue, multilayer graphene (Gr) was added as a reinforcement to NiAl bond coat. NiAl-based coatings with 0%, 0.6%, and 6% Gr were prepared via high-velocity oxygen fuel (HVOF), and their oxidation behaviors at 1050 °C were investigated. The results show that the addition of Gr apparently improves the high-temperature oxidation resistance of the NiAl coating. Mixed oxides of steady-state α-Al₂O₃ and metastable θ-Al₂O₃ form on the NiAl coating, while nearly pure α-Al₂O₃ is exhibited on the NiAl-0.6Gr and NiAl-6Gr coatings. The excellent oxidation resistance of the NiAl-0.6Gr coating is attributed to the dense protective α-Al₂O₃ layer formed by selective oxidation and the reduced agglomeration of Gr due to its appropriate content.

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石墨烯对NiAl涂层高温氧化行为的影响及机理研究

现有的金属结合涂层正在努力应对对高热障涂层日益增长的需求。为了解决这个问题，多层石墨烯（Gr）被添加到NiAl结合涂层中作为增强剂。采用高速氧燃料（HVOF）制备了Gr为0%、0.6%和6%的nial基涂层，并研究了其在1050℃下的氧化行为。结果表明，Gr的加入明显提高了NiAl涂层的高温抗氧化性能。NiAl涂层上形成稳态α-Al2O3和亚稳态θ-Al2O3的混合氧化物，而NiAl-0.6 gr和NiAl- 6gr涂层上则表现出接近纯净的α-Al2O3。NiAl-0.6Gr涂层具有优异的抗氧化性能，主要是由于α-Al2O3选择性氧化形成致密的保护层和适量的Gr减少团聚。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.