Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties · 1983 · 94 citations · 21 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials CharacterizationAmorphous MaterialsAmorphous SolidsCeramic MorphologyGrain Structure AnalysisMicrostructure AnalysisSinteringAlpha AluminaAluminaAlumina CeramicsAlumina Crystal StructureAmorphous Aluminum OxidesAmorphous Thin FilmsAnisotropyGrain Boundary Characterization
Abstract Grain boundary microstructures in a commercial 99.8% alumina ceramic have been analysed using transmission electron microscopy. Nearly all boundaries are wet by an amorphous film which should invalidate both the CSL and DSC lattice constructions. Facets of widely differing sizes are observed primarily on basal {0001}, rhombohedral {1012}, and prism {1120} planes. The facets are always multiatomic in height and range up to ∼ 1000 Å; this probably results from substantial anisotropy in the Al2O3-glass interfacial energy. Basal annealing twins are observed without amorphous films; they lie predominantly on {1120} and show interfacial energies much lower than adjacent random boundaries.
21
E. C. Subbarao · Medical Entomology and Zoology · 1981 · 1.3K citations
Structure and Properties of Solid Surfaces
R. Gomer, Cyril Stanley Smith · 1953 · 675 citations
Natural Sciences, Materials Engineering, Materials Science +12