Conclusions
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1.
A method of determining the local values of porosities over the surface of flat porous materials is developed and experimentally checked.
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2.
On the basis of experimental data it is shown that for the investigated materials the size of the initial particles and the thickness of the specimen do not have a noticeable effect on the uniformity of the porosity over the specimen's surface.
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3.
As metallographic investigations showed, the uniformity of the porosity of flat specimens is determined mainly by technological factors in the manufacture of the materials.
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Literature cited
L. Green and P. Duwez, J. of Appl. Mech.,18, No. 1, 39 (1951).
I. M. Fedorchenko, E. P. Dyban, V. S. Pugin, et al., Poroshkovaya Met., No. 12 (1967).
R. J. Goldstein, G. Shafit, and T. S. Chen, J. of Heat Transfer,87, Ser. C, No. 3, 36 (1965).
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Translated from Poroshkovaya Metallurgiya, No. 8 (68), pp. 78–83, August, 1968.
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Dyban, E.P., Maksimov, E.A., Pugin, V.S. et al. Determination of local porosity of permeable cermet materials. Powder Metall Met Ceram 7, 651–655 (1968). https://doi.org/10.1007/BF00780226
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DOI: https://doi.org/10.1007/BF00780226