Using laser ablation to give metallic surfaces hydrophobic/icephobic properties

该Engage项目的目标是支持全球参与者和飞机制造商普惠 加拿大在开发新的飞机材料方面取得了进展，这种材料本质上是防止形成 在运营期间结冰-在加拿大漫长的冬季，在此期间需要移动的持续问题 维护好了。通过一项新的大学-行业合作，这将涉及弗朗索瓦教授的团队 来自INRS-éMT的L和普惠加拿大的研发团队，我们将开发一种光学装置来 将飞机材料所需的表面改性从目前的实验室规模扩大到工业规模 相关的问题。必要的表面改性是在材料烧蚀的基础上获得所谓的莲花 效果。目前的实验室方法是在毫米尺寸上逐点扫描单个激光焦点 样品在材料的疏水性(即憎水性)方面取得了非常令人印象深刻的结果，但 这很耗时，因此还不适用于工业制造过程。我们的目标是 合作努力是开发一种基于高功率激光的技术来处理非常大的样品 做爱。这将使工业合作伙伴真正受益于这项尖端技术，因为 飞机零件的尺寸是几十米。我们的工作将包括对参数空间的全面探索 脉冲持续时间的术语(从飞秒到1000倍皮秒范围，1飞秒= 0.000000000000001秒)、脉冲能量和激光击发次数以及不同的治疗方法 样品面积同时较大。修改后的样品表面将在室内进行表征，所有 结果将在来自INRS-ÉMT和Pratt&Whitney的两个参与团队之间进行密切讨论。这个 实验测量将在先进激光光源(ALL)上进行，它们将 对于估计当前可用的处理速度的潜在或限制而言是必不可少的 激光技术。

The goal of this Engage project is to support the global player and aircraft manufacturer Pratt & Whitney Canada in the development of new airplane materials that are intrinsically protected against the formation of ice during operation - a constant issue in the long Canadian winters during which mobility needs to be maintained. Through a new university-industry collaboration, which will involve the team of Prof. François Légaré from INRS-ÉMT and the R&D team of Pratt & Whitney Canada, we will develop an optical setup to scale the required surface modification of airplane material from the present laboratory scale to an industrially relevant one. The necessary surface modification is based on material ablation to obtain the so-called Lotus effect. The current laboratory methology of a point-by-point scanning of a single laser focus over a mm sized sample leads to very impressive results in terms of material's hydrophobicity (i.e. water repellence), but is very time consuming and thus not yet applicable to industrial manufacturing processes. The goal of our collaborative effort is to develop a technique based on high power lasers to treat much larger samples in a very short time. This would allow the industrial partner to truly benefit from this cutting edge technology since airplane parts are on the tens of meters scale. Our effort will include a full exploration of the parameter space in terms of pulse duration (from the femtosecond to the 1000 times longer picosecond range, 1femtosecond = 0.000000000000001 second), pulse energy and number of laser shots as well as different methods to treat a large sample area simultaneously. The modified sample surface will be characterized in house and all the results will be closely discussed among the two teams involved, from INRS-ÉMT and Pratt & Whitney. The experimental measurements will be performed at the Advanced Laser Light Source (ALLS) and they will be essential in order to estimate the potential or limitations in terms of processing rates with currently available laser technologies.