The application of the model equation method in the preparation of porous copper by using needlelike and spherical carbamide as a space holder

Abstract

The measurement and predictive functions of the model equation method in the preparation of porous copper were studied. Needlelike and spherical carbamide was used as a space holder with volume content between 10 and 80%. One step of heat treatment for green compacts was applied to fabricate porous copper. A criterion for determining the uniformity of external dimensions of porous copper was proposed. The results showed that the mass follows the law of conservation and the height of porous copper decreased as the increase of spacer content while there was no regularity for the diameter. The porosity of porous copper calculated by the model equation method was equal to those of by the mass volume method. The theoretical formula obtained to describe the relationship between porosity and spacer content of porous copper intersects with the empirical formula. The results indicated that the measurement function of the model equation method was easier to play than the prediction function.

Effects of the Space Holder Shape on the Pore Structure and Mechanical Properties of Porous Cu with a Wide Porosity Range

“…Therefore, the effect of the space holder shape relative to its content on the pore structure and mechanical properties of porous Cu was studied in this work. Based on the author’s previous research [ 10 , 11 , 12 ], spherical carbamide with two sizes was selected as the space holder due to its high quality, low price, and easy removal at low temperature.…”