树脂/石墨复合材料激光烧蚀与累积效应研究

doi:10.3901/JME.2022.15.302

机械工程学报 ›› 2022, Vol. 58 ›› Issue (15): 302-312.doi: 10.3901/JME.2022.15.302

• 数字化设计与制造 • 上一篇

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树脂/石墨复合材料激光烧蚀与累积效应研究

张福林^1,2,3, 何建国^2,3, 刘洋^2,3, 代守军^2,3, 谢玉莹¹, 黄超¹, 凡炼文⁴, 刘思思¹

1. 湘潭大学机械工程学院湘潭 411105;
2. 中国科学院空天信息创新研究院北京 100094;
3. 中国科学院计算光学成像技术重点实验室北京 100094;
4. 中国科学院空间应用工程与技术中心北京 100094

收稿日期:2021-09-16 修回日期:2021-12-28 出版日期:2022-08-05 发布日期:2022-10-13
通讯作者: 刘思思(通信作者),女,1986年出生,博士,教授,硕士研究生导师。主要研究方向为精密机械与摩擦学。E-mail:liusisi@xtu.edu.cn
作者简介:张福林,男,1993年出生。主要研究方向为脉冲激光制造技术。E-mail:18256942984@163.com
基金资助:
国家自然科学基金（52175191）、中国科学院科研仪器设备研制（YJKYYQ20200047）、陕西省重点研发计划（2019ZDLGY01-04）和国家重点研发计划（2018YFB0407400）资助项目。

Investigations on Pulsed Laser Ablation and Incubation Effect in the Composite of Resin and Graphite

ZHANG Fulin^1,2,3, HE Jianguo^2,3, LIU Yang^2,3, DAI Shoujun^2,3, XIE Yuying¹, HUANG Chao¹, FAN Lianwen⁴, LIU Sisi¹

1. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105;
2. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094;
3. Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing 100094;
4. Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094

Received:2021-09-16 Revised:2021-12-28 Online:2022-08-05 Published:2022-10-13

摘要/Abstract

摘要： 树脂/石墨复合材料在氢燃料电池领域具有重要的工程应用价值与科研价值。区别于传统的成型与机加工方法，脉冲激光制造在树脂/石墨复合材料上极具应用前景。然而，近年来激光加工树脂/石墨复合材料的研究鲜有报道，进行脉冲激光对材料的烧蚀动力学研究对推动密流道石墨双极板激光制备技术具有重要意义。通过结合有限元仿真和试验探究了在低能量密度下（15.33~30.35 J/cm²）纳秒脉冲激光烧蚀该材料的孔径变化，确定不同入射脉冲数下材料的烧蚀阈值以及多脉冲累积效应。研究发现，在波长1 064 nm脉冲激光的作用下，随着入射激光能量密度和脉冲数的增加，该材料表面烧蚀孔径逐渐增大直至饱和，这与金属材料相似；该材料的烧蚀阈值会随着入射脉冲数的增加而下降，在饱和前的变化率非常显著，该材料的累积因子远小于金属材料。基于研究结果，在石墨复合材料双极板上制备出了高深宽比的密流道。

关键词: 纳秒脉冲激光烧蚀, 树脂/石墨复合材料, 累积效应, 燃料电池

Abstract: The composite of resin and graphite carries important engineering application and science research value in the hydrogen fuel cells field.Compared with traditional forming and machining methods, pulsed laser processing has extremely good application prospects on the material.However, little attention has been paid to the study of laser processing to the composite of resin and graphite, and the investigation of ablation dynamics to the composite with pulsed laser is greatly significant, which encourages the preparation techniques of micro channels with laser on the graphite bipolar plate.Combining finite element simulation and relevant experiments, the crater diameter changes of the composite ablated by nanosecond pulsed laser are discussed under low fluence conditions ranging from 15.33 J/cm² to 30.35 J/cm², and the ablation thresholds to different number of pulses and incubation effect to the composite are determined.It is found that the ablated crater diameter on the composite rises up to the saturation as the incident fluence and pulse number increase under a pulsed laser with a wavelength of 1 064 nm, which is similar to the metal.The ablation threshold to the composite decreases with increasing the number of pulses, and the changing rate is very obvious before the saturation.Moreover, the incubation factor of the composite is much less than the metal.Based on the results, the micro channels with high aspect ratio are prepared on the graphite composite bipolar plate.

Key words: nanosecond pulsed laser ablation, composite of resin and graphite, incubation effect, fuel cell

中图分类号:

TN249

张福林, 何建国, 刘洋, 代守军, 谢玉莹, 黄超, 凡炼文, 刘思思. 树脂/石墨复合材料激光烧蚀与累积效应研究[J]. 机械工程学报, 2022, 58(15): 302-312.

ZHANG Fulin, HE Jianguo, LIU Yang, DAI Shoujun, XIE Yuying, HUANG Chao, FAN Lianwen, LIU Sisi. Investigations on Pulsed Laser Ablation and Incubation Effect in the Composite of Resin and Graphite[J]. Journal of Mechanical Engineering, 2022, 58(15): 302-312.

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树脂/石墨复合材料激光烧蚀与累积效应研究

Investigations on Pulsed Laser Ablation and Incubation Effect in the Composite of Resin and Graphite

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