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The α-Fe 2 O 3 /α-Al 2 O 3 heterostructure interfaces have been studied using transmission electron microscopy (TEM). The interface exhibited coherent regions separated by equally spaced misfit dislocations. The misfit dislocations were demonstrated to be edge dislocations with dislocation spacing of ∼4nm. The strain fields around the misfit dislocation core were mapped...
Fe ions were implanted into α-Al 2 O 3 single crystals (sapphire) at energy of 50keV and annealed in an oxidizing environment. Transmission electron microscopy (TEM) investigation indicated that Fe ions in the near surface region precipitated as α-Fe 2 O 3 islands and spinel islands on the specimen surface, at the same time, Fe ions in the region away from the surface...
Fe ions were implanted into α-Al 2 O 3 single crystals (sapphire) at room temperature and annealed in a reducing atmosphere. The orientation relationships (ORs) between α-Fe particles and sapphire matrix were investigated using transmission electron microscopy (TEM). All the α-Fe particles have the orientation relationship (OR) of (111) α-Fe ||(0001) sapphire and [11¯0]α-Fe||[112¯0]sapphire...
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