Modification of Sintering Kinetics by Solute Segregation in Al2O3 |
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| Authors: | P J JORGENSEN |
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| Affiliation: | Research Laboratory, General Electric Company, Schenectady, New York |
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| Abstract: | The segregation of MgO solute at grain boundaries in Al2O3 controls the grain-growth kinetics during sintering. In the initial stages of sintering where grain growth can be neglected, the MgO solute causes a decreased sintering rate by reducing the surface energy and/or the diffusion coefficient of the rate-determining species. During the later stages of sintering, the segregated solute decreases the grain-growth rate which dominates the sintering kinetics. |
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