Ti6Al4V表面纹理制备及其润湿性

Fabrication of surface texture on Ti6Al4V alloy and its wettability

采用激光加工技术在Ti6Al4V表面分别加工直线、网格和具有规则点阵状结构的表面纹理,采用自组装技术制备自组装分子膜。采用扫描电镜、形貌分析仪和接触角测量仪对成膜后的钛合金表面进行形貌和接触角的表征与测量。结果表明,通过激光加工和沉积自组装分子膜,可显著增大Ti6Al4V的水接触角。其中直线纹理的试样表面水接触角可达124.8°,网格纹理的试样表面接触角可达126.1°,点阵状纹理的试样表面接触角可达151.6°。表面接触角与表面粗糙度相关,随着表面粗糙度值的增大,接触角呈增大趋势,当表面粗糙度>4μm时,接触角均>150°,形成超疏水表面。

Abstract： Surface texture of line texture, grid texture and space-lattice was manulactured to 1 lbAl4 V allOy wltn laser surface modification method and self-assembled monolayers （SAMs） was deposited on the texturing sur- face with self-assembled method. Scanning electron microscope, surface profiler and contact angle measurement were used to analyze the surface properties of specimen. It is shown that after laser manufacturing and preparing self-assembled monolayers, the contact angles of the water droplet on the surface increased significantly, and the contact angles of the water droplet on the specimens with line texture can attain to 124.8°, on the specimens with grid texture can attain to 126.1°, on the specimens with space-lattice can attain to 151.6°. The contact an- gle bears directly upon the surface roughness. The contact angle tends to bigger as the increment of the surface roughness. When the roughness is over 4μm, all of the contact angles are bigger than 150°, it means that a su- per-hydrophobic surface has formed.