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Effect of the method of production of porous powder metallurgy materials on their capillary properties (review)

  • Powder Materials, Parts And Coatings
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Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

The unique features of liquid infiltration in capillary porous powder metallurgy materials (CPPM) are discussed. The effect of the production method on the maximum height and rate of capillary rise of a liquid in CPPM is clarified. It is shown that in materials with a uniform pore structure, and the same average pore size, the maximum value of Hmax is attained when the form factor of the initial powder particles is a minimum. The highest values of liquid infiltration rate at closely similar heights of capillary rise (within 5–7%) were obtained in CPPM with a variable pore distribution prepared from mixtures of powders with dtiferent particle sizes (pseudo fluidization method), or in CPPM with a biporous structure prepared by the sintering of a previously oxidized powder, by compacting metal powder with a pore forming agent, as well as by the cathodic deposition of a porous copper structure from electrolytic solution.

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Authors
  1. V. K. Sheleg
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  2. V. V. Sabich
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Additional information

Scientific Research Institute for Powder Metallurgy, Minsk. Translated from Poroshkovaya Metallurgiya, Nos. 5–6, pp. 30–39, May-June, 1996. Original article submitted July 14, 1994.

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Sheleg, V.K., Sabich, V.V. Effect of the method of production of porous powder metallurgy materials on their capillary properties (review). Powder Metall Met Ceram 35, 244–252 (1996). https://doi.org/10.1007/BF01328827

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