Ultra-fast laser modification of LaYbZrCeO7 thermal barrier coating surface and its hydrophobic behavior

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-05-27 DOI:10.1016/j.surfcoat.2025.132328

Ziyu Chen , Yixin Xiao , Yuancheng Li , Haizhong Zheng , Guifa Li , Yongxiang Geng , Peifeng Zhou , Xin Wang

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Abstract

Hydrophobic surfaces are pivotal for self-cleaning, anti-icing, and corrosion resistance. Developing hydrophobic LaYbZrCeO₇ thermal barrier coating (TBC) offers an effective strategy to mitigate adhesion and corrosion induced by molten CMAS. In this paper, a periodic tip array with an average diameter of 100 μm and height of 45 μm was fabricated on LaYbZrCeO₇ TBC using femtosecond laser processing. Compared to the original coating, the periodic tip array increased non-polar CC bonds by 14.35 % and decreased polar C-O-C, O-C=O, and -OH bonds by 7.26 %, 7.09 %, and 19.66 %, respectively, thereby reducing the surface polarity. Additionally, droplets form a “solid-gas-liquid” three-phase contact with the periodic tip array, reducing solid-liquid interaction and enhancing hydrophobicity. The average contact angles on the LaYbZrCeO₇ tip array and original coating were 145.2° and 58.4°, respectively, demonstrating the array's hydrophobicity. In addition, the contact angle between the periodic tip array and molten CMAS is 59.6°, which is significantly higher than the original coating's 19.6°.These results offer novel insights into enhancing the resistance of LaYbZrCeO₇ TBC against adhesion and corrosion from molten CMAS.

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LaYbZrCeO7热障涂层表面的超快激光改性及其疏水性

疏水表面是自清洁、防结冰和耐腐蚀的关键。开发疏水的LaYbZrCeO7热障涂层（TBC）为减轻熔融CMAS引起的粘附和腐蚀提供了有效的策略。本文采用飞秒激光加工技术，在LaYbZrCeO7 TBC上制备了平均直径为100 μm、高度为45 μm的周期性尖端阵列。与原始涂层相比，周期性尖端阵列使非极性CC键增加了14.35%，使极性C-O-C、O- c =O和-OH键分别减少了7.26%、7.09%和19.66%，从而降低了表面极性。此外，液滴与周期性尖端阵列形成“固-气-液”三相接触，减少固-液相互作用，增强疏水性。LaYbZrCeO7尖端阵列和原始涂层的平均接触角分别为145.2°和58.4°，显示出阵列的疏水性。此外，周期尖端阵列与熔融CMAS的接触角为59.6°，明显高于原涂层的19.6°。这些结果为提高LaYbZrCeO7 TBC抗熔融CMAS的粘附和腐蚀能力提供了新的见解。

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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.