Bioinspired electrohydrodynamic ceramic patterning of curved metallic substrates
Bioinspired electrohydrodynamic ceramic patterning of curved metallic substrates
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DOI：
10.1680/bbn.14.00020
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
A. Nithyanandan;S. Mahalingam;Jie Huang;S. Rehman;E. Draper;M. Edirisinghe
中科院分区：
文献类型：
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作者：
A. Nithyanandan;S. Mahalingam;Jie Huang;S. Rehman;E. Draper;M. Edirisinghe
模板辅助电流体动力雾化（TAEA）已被用于第一次图案化弯曲的金属表面。在室温下，在钛基体上制备了直径约为25 mm的凸形和凹形的陶瓷二氧化钛（TiO 2）平行线。在20 µl/min、10 kV和收集距离80 mm的稳定锥形喷射过程中，在300 s内沉积4wt%的TiO 2乙醇悬浮液获得了最佳结果。实现了对图案线宽、线间距和厚度的高度控制。纳米压痕载荷-位移曲线在整个加载和卸载循环中是连续的，表明图案与基底之间具有良好的粘附性。在1 μN/s的加载速率和1 s的保持时间下，图案硬度随着载荷增加而降低，直到7 μN，并且直到更高的载荷保持在0. 1 GPa。弹性模量表现相似，都是不敏感的加载速率。同时还研究了热处理对图案化镀层进一步强化的影响。
Template-assisted electrohydrodynamic atomisation (TAEA) has been used for the first time to pattern curved metallic surfaces. Parallel lines of ceramic titania (TiO2) were produced on titanium substrates, convex and concave with diameters of ~25 mm, at the ambient temperature. Optimal results were obtained with 4 wt% TiO2 in ethanol suspension deposited over 300 s during stable cone-jetting at 20 µl/min, 10kV and collection distance 80 mm. A high degree of control over pattern line width, interline spacing and thickness were achieved. Nanoindentation load-displacement curves were continuous for the full loading and unloading cycle, indicating good adhesion between pattern and substrate. At a loading rate of 1 μN/s and a hold time of 1 s, pattern hardness decreased as load increased up to 7 μN and remained at 0·1 GPa up to higher loads. Elastic modulus behaved similarly, and both were not sensitive to loading rate. The effect of heat treatment to further consolidate the patterned deposits was also investi...