Fabrication of copper-based two-tiered surface microstructures by picosecond laser micromachining in combination with electrodeposition for enhanced two-phase heat transfer

IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Ziqing Ouyang , Yongkang Yan , Yiqiang Long , Bingjun Luo , Zhengliang Su , Jiangyou Long
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Abstract

Multiscale copper-based surface microstructures are required in miniaturized two-phase heat exchange devices. In this study, we propose a method that combines picosecond laser micromachining and electrodeposition to prepare copper-based two-tiered surface microstructures. The surface structures consist of periodic mini-grooves covered by dense microcones. The mini-grooves, prepared using ultrafast laser micromachining, offer a superior capillary transport performance. On the other hand, the microcone structures, prepared by electrodeposition, provide more effective nucleation sites for liquid–vapor phase changes. Compared to single-tiered mini-groove structures, the minigroove-microcone composite structures demonstrate an 8.2% increase in critical heat flux (CHF) and a 21–58% increase in heat transfer coefficient (HTC) during capillary-fed boiling tests. The method presented in this study introduces a new approach for fabricating high-performance wick structures suitable for ultrathin two-phase heat exchange devices.

Abstract Image

Abstract Image

皮秒激光微加工结合电沉积制备铜基双层表面微结构以增强两相传热
小型化的两相换热装置需要多尺度的铜基表面微观结构。在这项研究中,我们提出了一种结合皮秒激光微加工和电沉积的方法来制备铜基两层表面微结构。表面结构由密集的微锥覆盖的周期性微槽组成。使用超快激光微加工制备的微型凹槽提供了优越的毛细管输送性能。另一方面,电沉积制备的微锥结构为液-气相变提供了更有效的成核位点。在毛细管沸腾试验中,与单层微槽结构相比,微槽-微锥复合结构的临界热流密度(CHF)提高了8.2%,传热系数(HTC)提高了21-58%。本研究提出了一种适用于超薄两相换热装置的高性能芯结构的新方法。
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来源期刊
Applied Surface Science
Applied Surface Science 工程技术-材料科学:膜
CiteScore
12.50
自引率
7.50%
发文量
3393
审稿时长
67 days
期刊介绍: Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.
文献相关原料
公司名称
产品信息
阿拉丁
polyethylene glycol
阿拉丁
nickel sulfate
阿拉丁
orthoboric acid
阿拉丁
sodium hypophosphite
阿拉丁
sodium citrate
阿拉丁
copper sulfate
阿拉丁
Sodium hypophosphite (NaH2PO2)
阿拉丁
Sodium citrate (Na3C6H5O7)
阿拉丁
Copper sulfate (CuSO4)
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