International Journal of Extreme Manufacturing, Volume. 6, Issue 4, 45503(2024)

Bioinspired directional structures for inhibiting wetting on super-melt-philic surfaces above 1200 °C

Wang Hujun, Zhao Xiuyuan, Xie Zhengcan, Yang Biao, Zheng Jing, Yin Kai, and Zhou Zhongrong

Over the past two decades, superhydrophobic surfaces that are easily created have aroused considerable attention for their superior performances in various applications at room temperature. Nowadays, there is a growing demand in special fields for the development of surfaces that can resist wetting by high-temperature molten droplets (>1200 °C) using facile design and fabrication strategies. Herein, bioinspired directional structures (BDSs) were prepared on Y2O3-stabilized ZrO2 (YSZ) surfaces using femtosecond laser ablation. Benefiting from the anisotropic energy barriers, the BDSs featured with no additional modifiers showed a remarkable increase from 9.2° to 60° in the contact angle of CaO–MgO–Al2O3–SiO2 (CMAS) melt and a 70.1% reduction in the spreading area of CMAS at 1250 °C, compared with polished super-CMAS-melt-philic YSZ surfaces. Moreover, the BDSs demonstrated exceptional wetting inhibition even at 1 400 °C, with an increase from 3.3° to 31.3° in contact angle and a 67.9% decrease in spreading area. This work provides valuable insight and a facile preparation strategy for effectively inhibiting the wetting of molten droplets on super-melt-philic surfaces at extremely high temperatures.

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Wang Hujun, Zhao Xiuyuan, Xie Zhengcan, Yang Biao, Zheng Jing, Yin Kai, Zhou Zhongrong. Bioinspired directional structures for inhibiting wetting on super-melt-philic surfaces above 1200 °C[J]. International Journal of Extreme Manufacturing, 2024, 6(4): 45503

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Received: Jan. 17, 2024

Accepted: Dec. 25, 2024

Published Online: Dec. 25, 2024

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DOI:10.1088/2631-7990/ad4074

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