Journal of the American Ceramic Society · 1989 · 12 citations · 6 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramicsMaterials CharacterizationMechanical Behavior Of MaterialsAlloysGrain GrowthGrain Size DistributionGrain Structure AnalysisGrain Structure FormationMicrostructure EvolutionChemical DiffusionGrain Growth During SolidificationGrain Growth KineticsGrain Growth MechanismsGrain Morphology EvolutionHot Isostatic PressingHot PressingIsostatic Pressing
Grain growth during hot isostatic pressing is examined at 1373 to 1673 K at 5 to 200 MPa for 0.5 to 4 h on alumina presintered at 1723 to 1873 K. A linear relation is found between logarithms of grain size and porosity. To account for this result, the development of similar microstructures is suggested regardless of the histories of the starting powder and process. Temperature dependences of grain growth and densification must also be equal during hot isostatic pressing. Both grain growth and densification were controlled by the grain‐boundary diffusion of the aluminum ions.
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