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使用纳秒光纤激光器对水泥基材料进行激光碎斑处理的实验研究。

An experimental investigation of laser scabbling on cement-based materials using nanosecond fiber laser.

作者信息

Van Huynh Tam, Mondal Mounarik, Lee Dongkyoung

机构信息

Department of Future Convergence Engineering, Kongju National University, Cheonan, 31080, Korea.

Department of Mechanical and Automotive Engineering, Kongju National University, Cheonan, 31080, Korea.

出版信息

Sci Rep. 2022 Jul 16;12(1):12202. doi: 10.1038/s41598-022-16301-4.

DOI:10.1038/s41598-022-16301-4
PMID:35842467
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9288485/
Abstract

In this study, the influence of a pulsed fiber laser of 250 W power with a spot size of 40 µm was successfully analyzed during scabbling of six types of cement mortar and three types of ultra-high-performance concrete (UHPC). Confocal microscopy on the surface of the scabbled samples elucidated the formation of three distinct zones: glassy layer (GL), partially melted zone (PMZ), and heat-affected zone (HAZ) with unique morphological appearances. The glassy layer exhibited bubble formation, whereas cracks were spotted alongside the scabbled area. The difference in scabbling depth between the beginning and end of the process was revealed by using 3D topography images. Moreover, the development of pores and the changes in the microstructure of each zone were observed by using scanning electron microscopy (SEM). Further energy dispersive X-ray (EDX) analysis also revealed significant changes in the percentage of silicon and calcium inside the glassy layer and non-processed zone (NPZ).

摘要

在本研究中，成功分析了功率为250 W、光斑尺寸为40 µm的脉冲光纤激光器在六种类型水泥砂浆和三种类型超高性能混凝土（UHPC）的刻痕过程中的影响。对刻痕样品表面进行的共聚焦显微镜观察揭示了三个不同区域的形成：玻璃层（GL）、部分熔化区（PMZ）和热影响区（HAZ），它们具有独特的形态外观。玻璃层出现气泡形成，而在刻痕区域旁边发现了裂纹。通过使用三维地形图像揭示了该过程开始和结束时刻痕深度的差异。此外，使用扫描电子显微镜（SEM）观察了每个区域的孔隙发展和微观结构变化。进一步的能量色散X射线（EDX）分析还揭示了玻璃层和未处理区（NPZ）内硅和钙百分比的显著变化。

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本文引用的文献

1
High-Power Fiber Laser Cutting for 50-mm-Thick Cement-Based Materials.
Materials (Basel). 2020 Mar 2;13(5):1113. doi: 10.3390/ma13051113.
2
Effect of Laser Speed on Cutting Characteristics of Cement-Based Materials.
Materials (Basel). 2018 Jun 21;11(7):1055. doi: 10.3390/ma11071055.
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Heat accumulation during pulsed laser materials processing.脉冲激光材料加工过程中的热积累。
Opt Express. 2014 May 5;22(9):11312-24. doi: 10.1364/OE.22.011312.