Features of growth of non-cubic bicrystals from the melt (example of leucosapphire and neodymium gallate)

Kotelianskii, I. M.; Kravchenko, V. B.; Luzanov, V. A.; Mirgorodskaia, E N; Sobolev, A. T.

doi:10.1088/1742-6596/97/1/012266

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Materials and Microstructural Characterization1

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2021

2023

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“…The Cu bicrystal in this work was fabricated by pulling two Cu single-crystal seeds at a desired misorientation angle from the melt (Czochralski technique 9 – 11 ) (MaTeck GmbH). The GB in the bicrystal was designed to have a misorientation relationship of [0 0 1]/45° with a pure tilt component and its plane was roughly parallel to the (0 1 0) and (1 −1 0) planes of two mating grains (Fig.…”

Section: Materials and Microstructural Characterizationmentioning

confidence: 99%

Faceting–roughening transition of a Cu grain boundary under electron-beam irradiation at 300 keV

Lee

Han

2021

Sci Rep

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In this study, we examined the beam-irradiation effect on the structural evolution of the grain boundary (GB) in a Cu bicrystal at room temperature using a Cs-corrected, monochromated transmission electron microscope at an acceleration voltage of 300 keV. Faceting of the GB was observed at a low current density of the electron beam. With increasing current density, the GB became defaceted. The faceting–roughening transition was shown to be reversible, as the process was reversed upon decreasing the current density. The structural transition is explained by inelastic scattering effects by electron-beam irradiation.

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Section: Materials and Microstructural Characterizationmentioning

confidence: 99%