Journal of the American Ceramic Society · 1965 · 77 citations · 6 references
EngineeringMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials ProcessingGrain GrowthGrain Size DistributionGrain Structure FormationGrain-surface ChemistryPowder MetallurgySinteringCrystal Surface EnergyDiffusion During SinteringGrain BoundariesGrain Growth KineticsGrain Growth MechanismsSegregationSintering KineticsSurface Energy Effects
The segregation of MgO solute at grain boundaries in Al 2 O 3 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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