Deformation of Polymer and Silicate Glasses: Kinetics of Thermally Stimulated Recovery of the Initial State of Glass Samples

摘要

The structure of vitreous systems under plastic deformation transforms from the ground state into an excited state. The excitation of an atom is reduced to a critical atomic displacement that corresponds to a maximum of the interatomic attractive force. The generation of excited atoms (or groups of atoms) begins at the earliest stages of the loading. The steady-state regime of generation of excited atoms is established when the concentration of critically displaced atoms reaches a limiting value related to the criterion for glass transition in liquids. The thermally induced recovery of plastically deformed glasses is explained by the reverse transition of excited atoms to the ground state and can be adequately described within the framework of the model of an excited state.