ABSTRACT
Pore filling processes were observed during iiquid phase sintering in Co-Cu alloy. And the experimental results were compared with the theoretical results of Park`s theory. The spherical Cu powder and the Cu wire were used for forming the artificial pores. The Cu contents of the green compacts were varied from 28 wt% to 32 wt% of Cu and the green compacts were sintered in a dried hydrogen atmosphere for various sintering time at 1200℃. The distributions of gram size and pore size were estimated by image analyzer. The experimental results showed that the pore filling processes by liquid phase were agree to some extent with the theoretical estimate. But for the large spherical pores and the cylindrical pores in 72Co-28Cu alloy were not consistant with the theoretical results. Those large pores were shrunken slowly during the prolonged sintering and the shrunken phenomena of the cylindrical pores were investigated.
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