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Defects and separation of amorphous nanofilms from crystalline substrates |
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| Authors: | S V Bobylev I A Ovid’ko A E Romanov A G Sheinerman |
| Institution: | (1) Institute of Problems in Mechanical Engineering, Russian Academy of Sciences, Vasil’evskiĭ ostrov, Bol’shoĭ pr. 61, St. Petersburg, 198504, Russia;(2) St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 198504, Russia;(3) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |
| Abstract: | The conditions of separation of an amorphous nanofilm from a crystalline substrate are theoretically studied in terms of a disclination-dislocation model for a crystal-glass interface. In this model, such an interface is characterized by a high density of disclinations and dislocations. A criterion for the separation of an amorphous nanofilm from a crystalline substrate is obtained. The critical nanofilm thickness above which a film begins to separate is calculated as a function of the characteristics of the disclination-dislocation system and the dilatation misfit. |
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