超音波振動援用ナノテクスチャリング創成に関する研究

在过去的一年里，我专注于设计和制造适合润湿性调节的纹理表面，并建立相关理论。同时还分析了表面缺陷、毛刺、刀具磨损等问题。采用旋转超声织构（RUT）方法设计并制备了具有各向异性和单向润湿性能的织构表面。通过沿一定方向加工微沟槽和微韧窝，获得了各向异性润湿性能。通过对一种蝴蝶翅膀表面结构的学习，设计了一种微尺度棘轮结构，实现了单向润湿特性。为了提高性能，制作了分层结构。理论分析和实验研究了纹理特征对表面润湿性的影响。需要制造具有少量表面缺陷和毛刺的纹理表面。因此，使用我预先建立的建模方法，进一步分析了不同切削刃几何形状的材料去除过程。几何形状被优化以获得更好的表面质量。此外，制造大面积的纹理表面是非常必要的。因此，应尽量减少刀具磨损的不利影响。为了解决这一问题，制备了一种高耐磨的纳米聚晶金刚石刀具，并用于克服刀具磨损的不良影响。结果表明，使用该工具可以成功地加工出大面积的织构表面，且没有明显的刀具磨损。

In the past one year, I focused on designing and fabricating appropriate textured surfaces for modulating wettability and establishing the related theories. Other problems including surface defects, burrs and tool wear were also analyzed.Textured surfaces with anisotropic and unidirectional wetting properties were designed and fabricated by using the rotary ultrasonic texturing (RUT) method. The anisotropic wetting property was obtained by fabricating microgrooves and microdimples along a certain direction. The unidirectional wetting property was achieved by using a kind of microscale ratchet structure, which was designed by learning surface structures on wings of a kind of butterfly. To enhance the performances, hierarchical structures were fabricated. The influence of textural features on the surface wettability was also theoretically analyzed and experimentally studied.To fabricate textured surfaces with few surface defects and burrs is required. Therefore, the material removal processes with different cutting edges’ geometries were further analyzed using my pre-established modelling method. The geometries were optimized for better surface quality. Besides, to fabricate a textured surface in a large area is highly required. Therefore, the detrimental effect of tool wear should be minimized. To solve the problem, a highly wear-resistant nano-polycrystalline diamond tool was fabricated and used to overcome the bad effect of tool wear. The results show that textured surfaces in a large area can be successfully fabricated with no obvious tool wear by using the tools.