Thermal stability and abrasion resistance of NiCoCrAlYTa/Al2O3 gradient abrasive coating for blade tips by vacuum infiltration sintering

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2025-09-01 Epub Date: 2025-05-21 DOI:10.1016/j.surfcoat.2025.132312

De Wang , Jun Wang , Gezhou Wang , Wenqin Wang , Huan Liu , Xiaofeng Xiao , Hua Li , Zheng Fan

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Abstract

NiCoCrAlYTa/Al₂O₃ gradient abrasive coatings with varying Al₂O₃ contents were fabricated on single crystal superalloy via vacuum infiltration sintering for the protection of blade tips. The oxidation resistance, thermal shock resistance, and abrasion resistance of the coatings were investigated. The results showed that the abrasion rate of the coating was reduced by 33 % and the oxidation mass gain was decreased by 10.85 % through the incorporation of Al₂O₃ particles. Additionally, the YAlO₃ compounds formed by the reaction between Al₂O₃ particles and the NiCoCrAlYTa matrix suppressed intergranular crack propagation, resulting in a 61.15 % reduction in crack density and enhanced thermal shock resistance of the coating. These findings highlight the application potential of NiCoCrAlY/Al₂O₃ gradient coatings in high-temperature sections of turbine engines.

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真空渗烧NiCoCrAlYTa/Al2O3梯度磨料涂层的热稳定性和耐磨性

采用真空渗烧的方法在单晶高温合金上制备了不同Al2O3含量的NiCoCrAlYTa/Al2O3梯度磨料涂层，以保护叶片尖端。研究了涂层的抗氧化性、抗热震性和耐磨性。结果表明，Al2O3颗粒的掺入使涂层的磨损率降低了33%，氧化质量增益降低了10.85%。此外，Al2O3颗粒与NiCoCrAlYTa基体反应生成的YAlO3化合物抑制了晶间裂纹扩展，裂纹密度降低了61.15%，涂层的抗热震性增强。这些发现凸显了NiCoCrAlY/Al2O3梯度涂层在涡轮发动机高温部位的应用潜力。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.