Formation Mechanism of Gradient Wettability of Si3N4 Ceramic Surface Induced Using a Femtosecond Laser,Physica Status Solidi (A) - Applications and Materials Science

当前位置： X-MOL 学术 › Phys. Status Solidi A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Formation Mechanism of Gradient Wettability of Si3N4 Ceramic Surface Induced Using a Femtosecond Laser
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-05-27 , DOI: 10.1002/pssa.202000105
Qibiao Yang _{1,

2} , Zhihuai Lv ₁ , Tianyu Wu ₁ , Yang Chen ₁ , Xiaoping Ren ₃ , Jian Cheng ₁ , Deyuan Lou ₁ , Lie Chen ₁ , Zhong Zheng ₁ , Quan Rui ₄ , Dun Liu ₁

Affiliation

The gradient wettability surface is processed on the surface of Si₃N₄ ceramics using a 1030 nm femtosecond laser. Both the microdimple morphology, surface contact angle, and surface chemical structure are determined using optical microscopy, optical profilometry, contact angle measuring instrument, and X‐ray photoelectron spectroscopy (XPS). The effects of average laser power, scanning passes, and microdimple distribution density on both surface morphology and contact angle are also studied. Accordingly, the wettability surfaces of different gradients are processed by changing the microdimple distribution density, and the flow state of the cutting fluid on the gradient wettability surface is observed using a high‐speed camera. The results show that both the diameter and depth of the microdimple increase with the increase in the average laser power and scanning passes. As the average laser power increases, the surface contact angle gradually reduces and then increases. Moreover, because of the increase in scanning passes, the surface contact angle gradually decreases. The microdimple morphology is an important factor affecting the wettability of the sample surface. Reason construction of the surface microdimple distribution density can obtain different gradients of wettability surface. Furthermore, with a larger gradient, the wetting rate of the cutting fluid will be faster.

中文翻译：

飞秒激光诱导的Si3N4陶瓷表面梯度润湿性的形成机理

在Si ₃ N ₄的表面上对梯度润湿性表面进行处理陶瓷使用1030 nm飞秒激光。微凹痕形态，表面接触角和表面化学结构均使用光学显微镜，光学轮廓仪，接触角测量仪和X射线光电子能谱（XPS）确定。还研究了平均激光功率，扫描次数和微凹坑分布密度对表面形态和接触角的影响。因此，通过改变微凹坑分布密度来处理不同梯度的润湿性表面，并使用高速相机观察切削液在梯度润湿性表面上的流动状态。结果表明，微凹坑的直径和深度都随着平均激光功率和扫描次数的增加而增加。随着平均激光功率的增加，表面接触角逐渐减小然后增大。此外，由于扫描次数的增加，表面接触角逐渐减小。微酒窝形态是影响样品表面润湿性的重要因素。表面微凹坑分布密度的合理构造可以获得不同的润湿性表面梯度。此外，在较大的梯度下，切削液的润湿速率将更快。

更新日期：2020-05-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文