1. Bioinspired directional structures for inhibiting wetting on super-melt-philic surfaces above 1200 °C
- Author
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Hujun Wang, Xiuyuan Zhao, Zhengcan Xie, Biao Yang, Jing Zheng, Kai Yin, and Zhongrong Zhou
- Subjects
directional structures ,bioinspired design ,inhibiting wetting ,super-melt-philic ,superhydrophobic ,Materials of engineering and construction. Mechanics of materials ,TA401-492 ,Industrial engineering. Management engineering ,T55.4-60.8 ,Physics ,QC1-999 - Abstract
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 Y _2 O _3 -stabilized ZrO _2 (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–Al _2 O _3 –SiO _2 (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.
- Published
- 2024
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