Measurement of tortuosity of porous Cu using a diffusion diaphragm cell

Measurement of tortuosity of porous Cu using a diffusion diaphragm cell
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使用扩散隔膜池测量多孔铜的弯曲度

DOI:
10.1016/j.measurement.2017.07.014
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发表时间:
2017
期刊:
影响因子:
5.6
通讯作者:
Diao K
Diao K
中科院分区:
工程技术2区
文献类型:
--
作者:
Diao K

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由于流体流动具有良好的渗透性,开孔多孔金属具有许多潜在的应用,例如热交换器和液流电池。空间保持器方法制造的多孔金属具有可控的多孔结构,但流体路径和通道是曲折的。曲折度可以直接影响流体的渗透性和湍流度,进而影响多孔金属的性能。本文使用隔膜池直接通过扩散法测量了由消失碳酸盐烧结 (LCS) 制造的多孔铜的弯曲度。孔径为 250–1500 µm、孔隙率为 0.56–0.84 的样品的曲折度在 1.33–1.78 范围内。它随着孔隙率的增加而降低,随着孔径的增大而增加。测量值与文献报道的通过吸声法获得的值相当。
Open-cell porous metals have many potential applications, such as heat exchangers and flow batteries, due to good permeability for fluid flow. Porous metals manufactured by space holder methods have controllable porous structure, but the fluid pathways and channels are tortuous. The tortuosity can directly influence the fluid permeability and turbulence, which in turn affect the performance of the porous metal. This paper measured the tortuosity of porous Cu, manufactured by Lost Carbonate Sintering (LCS), directly by a diffusion method using a diaphragm cell. The tortuosity of the samples with pore sizes 250–1500 µm and porosities 0.56–0.84 was in the range of 1.33–1.78. It decreased with porosity and increased with pore size. The measured values were comparable to those reported in literature, obtained by the acoustic absorption method.
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