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- W3036692827 abstract "Because of the resolution limits of most microscopes, the imaging of the atomic structure of tilt grain boundaries in metals has been restricted to the most open structures with relatively large projected lattice parameters. In the case of Au the boundaries have been observed along a common [110] axis to both grains of bicrystalline specimens where coincidence cases have been studied such as the: Σ= 11, (113); Σ= 3, (111) and (112) and the ∑ = 19, (331) as well as other low and high angle boundary structures. Here the lattice periodicities visualized correspond to the {111} planes of 2.3Å. For the case of the b.c.c. lattice a Mo Σ = 41, (910) boundary was viewed along a common [001] were the {110} lattice planes of 2.2Å were visualized in a 200kV microscope. Even more recently the same author studied a boundary between the ∑ = 41 and ∑ = 25 reference orientations in Mo in a 400kV microscope, but apparently showed the same resolution as the previously mentioned study. Consequently, only a few studies of boundaries in metals have approached the 2Å resolution limit and recently images were obtained from a ∑ = 5, (310) symmetrical boundary in Au. In this latter study a relatively noisy image was obtained due to the reduced contrast transfer function of a 300kV microscope in the region of the second phase contrast zone. In the case of a 400kV microscope it is expected that a considerable improvement in information transfer would occur. It is therefore the intent of this study to present high resolution results for a tilt boundary in Au near a ∑ = 17, (530) orientation taken at 400kV which has been image processed to enhance the visualization of structural detail." @default.
- W3036692827 created "2020-06-25" @default.
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- W3036692827 date "1989-08-06" @default.
- W3036692827 modified "2023-10-14" @default.
- W3036692827 title "High resolution microscopy of a Σ = 17 grain boundary in gold" @default.
- W3036692827 doi "https://doi.org/10.1017/s042482010015335x" @default.
- W3036692827 hasPublicationYear "1989" @default.
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