Conclusions
A porous flame-arresting material is characterized by a critical thickness which provides the optimum structure and permeability of it. An increase in porosity and the use of nonspherical and coarsely dispersed powders increases the critical thickness of the material. It decreases as the result of addition to the original powder of a plasticizer (paraffin) in a quantity sufficient for formation on the surface of the particles of a continuous resistant layer. For powder metallurgy titanium with a porosity of 50% the optimum paraffin content is about 10 wt.%.
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Translated from Poroshkovaya Metallurgiya, No. 1(313), pp. 35–38, January, 1989.
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Gutman, F.G., Kornienko, P.A., Kostornov, A.G. et al. Porous structure of flame-arresting materials of metal powders. Powder Metall Met Ceram 28, 29–32 (1989). https://doi.org/10.1007/BF01171803
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DOI: https://doi.org/10.1007/BF01171803