Effect of ZrO2 Inclusions on the Sinterability of Al2O3 |
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| Authors: | FRED F LANGE TAKASHI YAMAGUCHI BURTON I DAVIS PETER ED MORGAN |
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| Affiliation: | Materials Department, College of Engineering, University of California, Santa Barbara. California 93106;Department of Science and Technology, Keio University, Yokohama, Japan;Rockwell Science Center, Thousand Oaks, California 91360 |
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| Abstract: | The sinterability of Al2O3/ZrO2 composite powder compacts containing 2 and 10 vol% ZrO2 was compared to the sinterability of their single-phase constituents through constant-heating-rate experiments. The ZrO2 inclusion phase delayed the initiation of bulk shrinkage and the temperature of maximum strain rate by 100°C. The ZrO2 inclusion phase also significantly inhibited grain growth. These results, discussed with regard to the thermodynamics of pore disappearance, suggest that phenomena inhibiting grain growth may also inhibit densification. |
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