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Determination of Physical Properties and Thermal Conductivity of Graphite Foam with Image Analysis

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Abstract

Since pore network structures of porous materials have irregular shapes and may vary in size, the accurate characterization and virtual 3D reconstruction of these materials are of great importance for a deeper understanding of the structure and subsequent calculations. In this study, the scanning electron microscope (SEM) and X-ray microcomputed tomography (µCT) images of a graphite foam sample are used for image analysis method (IAM) and virtual 3D reconstruction as non-destructive scientific tools with high accuracy. The morphological characterization and determination of effective pore diameter, porosity, specific surface area (SSA), and effective thermal conductivity (ETC) of POCO graphite foam are investigated. By examining the results obtained from the method of image analysis, it is found that there is a good agreement among the IAM results.

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Abbreviations

\(k_{wall}\) :

Cell wall thermal conductivity

\(D_{eff}\) :

Effective pore diameter

\(k_{eff}\) :

Effective thermal conductivity

LW :

Length and width of the image

\(n_{w}\) :

Number of white pixels

\(l_{P}\) :

Pore perimeter

\(A_{P}\) :

Pore area

\(\bar{f}z\) :

Shape factor

\(\emptyset\) :

Porosity

\(\rho_{r}\) :

Relative density

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Acknowledgements

This research is supported by the Scientific and Technological Research Council of Turkey under the Grant Number 315M136.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Ataturk University, Erzurum, Turkey

    Amir Mohammadimehr & İsmail Solmus

  2. Department of Computer Engineering, Ataturk University, Erzurum, Turkey

    Baris Ozyer

  3. Department of Mechanical Engineering, University of Bath, Bath, BA2 7AY, UK

    D. Andrew S. Rees

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  1. Amir Mohammadimehr
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  2. İsmail Solmus
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  4. D. Andrew S. Rees
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Correspondence to Amir Mohammadimehr.

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Mohammadimehr, A., Solmus, İ., Ozyer, B. et al. Determination of Physical Properties and Thermal Conductivity of Graphite Foam with Image Analysis. Int J Thermophys 41, 45 (2020). https://doi.org/10.1007/s10765-020-02623-w

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