Nanoporous metallic surface: Facile fabrication and enhancement of boiling heat transfer

Nanoporous metallic surface: Facile fabrication and enhancement of boiling heat transfer
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纳米多孔金属表面:易于制造并增强沸腾传热

DOI:
10.1016/j.apsusc.2012.05.085
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发表时间:
2012-09
影响因子:
6.7
通讯作者:
Lu, Longsheng
Lu, Longsheng
中科院分区:
材料科学1区
文献类型:
--
作者:
Tang, Yong;Tang, Biao;Qing, Jianbo;Li, Qing;Lu, Longsheng

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本文报道了一种灵活和低成本的方法,热镀锌和合金化,用于制造增强的纳米多孔金属表面。在热浸过程中形成了以γ- cu5zn8和β′-CuZn为主的Cu-Zn合金层。在阳极线性扫描伏安法测量中记录的多个氧化峰表明合金相的不同脱锌偏好。在自由腐蚀过程中获得孔径约为50 ~ 200nm的纳米多孔铜表面。在池沸实验中,纳米孔结构提高了表面润湿性,并显著降低了表面过热度。
The paper reports a flexible and low-cost approach, hot-dip galvanizing and dealloying, for the fabrication of enhanced nanoporous metallic surfaces. A Cu–Zn alloy layer mainly composed of γ-Cu5Zn8and β′-CuZn was formed during the hot-dipping process. The multiple oxidation peaks recorded in the anodic liner sweep voltammetry measurements indicate different dezincification preferences of the alloy phases. A nanoporous copper surface with approximately 50–200nm in pore size was obtained after a free corrosion process. The nanoporous structure improves the surface wettability and shows dramatic reduction of wall superheat compared to that of the plain surface in the pool-boiling experiments.
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