Surface modifications induced by pulsed-laser texturing-Influence of laser impact on the surface properties
Surface modifications induced by pulsed-laser texturing-Influence of laser impact on the surface properties
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DOI：
10.1016/j.apsusc.2013.10.069
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发表时间：
2014-01-01
影响因子：
6.7
通讯作者：
Oltra, R.
中科院分区：
文献类型：
--
作者：
Costil, S.;Lamraoui, A.;Oltra, R.
激光清洗技术提供了一种安全、环保且非常经济有效的方法来改善金属材料的清洁和表面处理。与高效的清洁工艺相比，它可以避免传统技术制备的延性材料的缺点（例如喷砂引起的裂纹），并且仅处理某些选定的区域（由于光纤）。通过这种方式，激光技术可以具有多种优势并扩大热喷涂的范围。此外，新一代激光器（光纤激光器、盘式激光器）允许开发新方法。除了显着减少体积、无需维护、运行成本低之外，激光纤维还可以引入替代治疗方法。将短脉冲激光与扫描仪相结合可实现表面处理方面的新应用。通过使用扫描激光倍增冲击，可以对基材表面进行塑形，以改善涂层附着力以及机械性能。此外，在激光束与金属表面相互作用的过程中，可以引起多种修改，特别是热效应。事实上，在环境条件下，清洁表面可能会发生有限的氧化。人们已经对硅的这种现象进行了详细研究，但有关金属材料的研究却很少报道。本文旨在研究激光纹理化后铝合金基体上诱导的表面改性。形态观察 (SEM) 后，将使用 XPS（X 射线光电子能谱）测量和显微硬度测试进行更深入的表面分析。 (C) 2013 Elsevier B.V. 保留所有权利。
Laser cleaning technology provides a safe, environmentally friendly and very cost effective way to improve cleaning and surface preparation of metallic materials. Compared with efficient cleaning processes, it can avoid the disadvantages of ductile materials prepared by conventional technologies (cracks induced by sand-blasting for example) and treat only some selected areas (due to the optical fibers). By this way, laser technology could have several advantages and expand the range of thermal spraying. Moreover, new generations of lasers (fiber laser, disc laser) allow the development of new methods. Besides a significant bulk reduction, no maintenance, low operating cost, laser fibers can introduce alternative treatments. Combining a short-pulse laser with a scanner allows new applications in terms of surface preparation. By multiplying impacts using scanning laser, it is possible to shape the substrate surface to improve the coating adhesion as well as the mechanical behaviour.In addition, during the interactions of the laser beam with metallic surfaces, several modifications can be induced and particularly thermal effects. Indeed, under ambient conditions, a limited oxidation of the clean surface can occur. This phenomenon has been investigated in detail for silicon but few works have been reported concerning metallic materials. This paper aims at studying the surface modifications induced on aluminium alloy substrates after laser texturing. After morphological observations (SEM), a deeper surface analysis will be performed using XPS (X-ray photoelectron spectroscopy) measures and microhardness testing. (C) 2013 Elsevier B.V. All rights reserved.