EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

For space applications, phase stability under extreme conditions such as high temperature and high pressure should be understood. At the same time, in order to enhance the performance of functional materials, nano materials are prequently used. Therefore, understanding the phase stability of nano materials under extreme conditions should be evaluated. CALPHAD (CALculation of PHAse Diagram) method is a useful tool to construct phase diagrams of various materials under different thermodynamic conditions. Researchers have extended the use of the CALPHAD method to nano phase diagram and pressure phase diagram studies. In this study, the phase diagram of an arbitrary A-B nanoparticle system under pressure was investigated. The effects of interaction parameter and excess volume have been investigated with increasing the pressure. It was found that the eutectic temperature decreases in the most cases, except for the case when the interaction parameter in liquid is zero, and that in solid is positive, while the excess volume parameter of liquid was positive. In this condition, the eutectic temperature increased with increasing the pressure.