Jing Xiubing, Xia Yani, Zheng Shuxian, Yang Chengjuan, Qi Huan, Jaffery Syed Husain Imran
Appl Opt. 2021 May 20;60(15):4434-4442. doi: 10.1364/AO.423564.
The life of ceramic tools restricts the development of the manufacturing industry and can be increased through the enhancement of surface performance. Laser surface texturing is a feasible technology to improve ceramic tool life based on the relationship between surface properties and the laser-texturing process. In this study, ${{\rm Al}_2}{{\rm O}_3}$ substrates have been textured by an ytterbium fiber laser system with a wavelength of 1064 nm and a pulse duration of 50 ns. First, the damage threshold of ${{\rm Al}_2}{{\rm O}_3}$ was measured to provide a basis for selecting laser-texturing parameters. The surface morphology was characterized using a white confocal scanning microscope and a scanning electron microscope to investigate the characteristics of laser processing. Water contact angles were measured to investigate the relationship between laser parameters and changes in wettability. The surface energy of the superhydrophobic ceramic was calculated based on the contact angle. Combined X-ray photoelectron spectroscopy (XPS) measurement was used to explore the mechanism of wettability changes from the chemical component and microstructure perspectives. The friction coefficient of ${{\rm Al}_2}{{\rm O}_3}$ was determined by a ball-on-disc wear test. The results showed that laser texturing can significantly improve the surface hydrophobicity and friction stability.
陶瓷刀具的使用寿命限制了制造业的发展，可通过提高表面性能来延长其使用寿命。基于表面性能与激光纹理化工艺之间的关系，激光表面纹理化是一种提高陶瓷刀具使用寿命的可行技术。在本研究中，采用波长为1064 nm、脉冲持续时间为50 ns的镱光纤激光系统对Al₂O₃ 基体进行纹理化处理。首先，测量了Al₂O₃ 的损伤阈值，为选择激光纹理化参数提供依据。使用白色共聚焦扫描显微镜和扫描电子显微镜对表面形貌进行表征，以研究激光加工的特性。测量水接触角，以研究激光参数与润湿性变化之间的关系。基于接触角计算超疏水陶瓷的表面能。结合X射线光电子能谱（XPS）测量，从化学成分和微观结构角度探索润湿性变化的机理。通过球盘磨损试验测定Al₂O₃ 的摩擦系数。结果表明，激光纹理化可显著提高表面疏水性和摩擦稳定性。
