Abstract
The MeV electron irradiation by high-voltage electron microscopy (HVEM) can introduce the simplest type of irradiation defects in materials, and sometimes leads to a phase transition with negligible temperature change and contamination. This technique makes it possible to continuously observe the phase transition process using electron microscopy simultaneously as defects are introduced. Therefore, HVEM can provide a unique opportunity to carry out in-depth studies on the phase transition introduced by the accumulation of defects under a significantly simplified condition. In this paper, the following phase transitions related to non-equilibrium phases under MeV electron irradiation are discussed: (1) solid state amorphization (SSA) in metallic compounds, (2) crystallization of metallic glasses, and (3) crystal-to-amorphous-to-crystal (C–A–C) transition.
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