文献类型：期刊文献

英文题名：Numerical study on morphology evolution of restoration crater on fused silica optical surface through low-repetition-rate CO2 pulsed laser

作者：Shen, Xiao Li, Yancheng Liu, Liguo Yuan, Fang Qiao, Shuo Xiong, Ying Zhang, Qingyi Man, Xin Cheng, Changjie Weng, Xiaoyu Han, Haitao

第一作者：Shen, Xiao

通信作者：Liu, LG[1]

机构：[1]Naval Univ Engn, Wuhan 430033, Peoples R China;[2]Shenyang Ligong Univ, Coll Mech Engn, Shenyang 110159, Peoples R China;[3]Natl Univ Def Technol, Coll Intelligence Sci & Technol, Changsha 410073, Peoples R China;[4]Natl Univ Def Technol, Hunan Key Lab Ultraprecis Machining Technol, Changsha 410073, Peoples R China;[5]Natl Univ Def Technol, Lab Sci & Technol Integrated Logist Support, Changsha 410073, Peoples R China;[6]Univ Macau, Taipa, Macao Special A, Peoples R China;[7]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China

第一机构：Naval Univ Engn, Wuhan 430033, Peoples R China

通信机构：corresponding author), Naval Univ Engn, Wuhan 430033, Peoples R China.

年份：2026

卷号：79

外文期刊名：CASE STUDIES IN THERMAL ENGINEERING

收录：;EI(收录号：20261020234900);WOS:【SCI-EXPANDED(收录号:WOS:001695196700001)】；

基金：The authors are indebted to China Postdoctoral Science Foundation (2023M744325, 2024M754257, 2024M754305, 2024M764130) , Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA2502031) , and the Science and Technology Innovation Program of Hunan Province (2024JJ6460) for their support.

语种：英文

外文关键词：Laser-material interactions; Molten pool; Interfacial behavior; Morphological characteristics; Secondary damage precursor

摘要：This study investigates the CO2 laser-based optical surface restoration mechanism through a multiphase level-set model incorporating solid-liquid-gas phase transitions. Key findings reveal that morphological evolution is governed by three synergistic forces: Marangoni-driven lateral material transport maintains post-irradiation rim expansion, vapor recoil induces transient "peak" formation through rapid melt expulsion, and capillary effects finalize smooth rim profiles. While exhibiting relatively high accuracy in crater depth prediction (deviation <= 12.15%), the model demonstrates systematic limitations in predicting rim height and diameter, attributable to the assumed key absorption parameter and temperature-dependent variations in material properties. Crucially, laser processing parameters (power density and pulse duration) exhibit proportional relationships with rim dimensions and ablation depth through vapor recoil duration modulation. The simulation-predicted secondary damage precursor mechanism is experimentally validated: FE-SEM analysis identifies CeO2 abrasive particle enrichment (peak intensity 793.45 ppm) on rim surfaces, spatially correlated with elevated photo-thermal absorption (355 nm UV laser, 3.3W pumping power) indicating increased damage risk. These findings not only confirm the melt flow dynamics simulation but also emphasize the necessity of impurity redistribution control in high-power laser optics restoration. The research provides theoretical guidance for parameter optimization in laser-induced surface reformation while highlighting the importance of mitigation measures for secondary precursor.