Abstract
The mechanism of volume reduction of the sintered compact using spherical copper powders was studied. The spherical copper powder was sieved so that the particle size was 53-45μm, compacted at specific density of 0.61, and sintered at 1223 K for 10.8 ks or 21.6 ks. The amount of volume reduction was measured by the Archimedes' method, and the volume reduction ratios were calculated from the above data. On the other hand, the volume reduction ratios were calculated from the neck radius under the assumption that the neck grew by the cons-tant-radius-interpenetration mechanism and the rearrangement did not occur in the sintering. The experimental value and calculated values of the volume reduction ratios were in good agreement with each other. It was clarified that the volume of the sintering compact reduced in accordance with the assumption of the calculation of the volume reduction ratio in this specific density.
