High-Pressure Si Phases and the Mutual Orientation of Their Structures. HRTEM Studies
Gordeeva T.1,2, Kulnitskiy B.
1,2, Popov M.1,2, Ovsyannikov D.1,2, Blank V.1,2
1Technological Institute for Superhard and Novel Carbon Materials, Centralnaya 7a, Troitsk, Moscow, Russian Federation
2Moscow Institute of Physics and Technology State University, Institutskiy per. 9, Dolgoprudny, Russian Federation
Email: gordeeva.ta@phystech.edu
Поступила в редакцию: 12 декабря 2020 г.
Выставление онлайн: 14 марта 2021 г.
As a result of high-resolution transmission electron microscopy (HRTEM) studies of silicon processed in a planetary mill in the presence of diamond powder, high-pressure phases were found: Si-III, Si-IV and Si-IX; moreover, a Si-IX particle with a length of more than 10 nm was detected by TEM methods for the first time. A study of the mutual orientations of the phases obtained allowed us to propose a scheme of transformations in silicon under pressure. We have shown that the Si-IX phase can be formed from Si-IV. The orientation relationship between Si-IV and Si-IX is established. Keywords: silicon, transmission electron microscopy, plastic deformation, planetary mill, phase transformation.
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