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

For the first time in laboratory practice, the specifics of the high-temperature interaction of liquid magnesium with carbon aerogel (AC) based on reduced graphene oxide were examined experimentally. It was found that at a temperature of 700°C in an atmosphere of pure argon, liquid magnesium exhibits good adhesion to the AC substrate and forms a permanent bond with it, which does not degrade during the solidification of magnesium and cooling of the Mg/AC couple.
The methodology of high-resolution structural characterization of high porosity carbon materials and their joints with dissimilar materials such as Mg/AC has been developed.
The detailed structural studies with the use of SEM, TEM, HRTEM and EDS methods allowed to explain the mechanism of the formation of a permanent connection between liquid magnesium and carbon aerogel through understanding the role of residual oxygen contained in the aerogel in the improvement of physicochemical compatibility in the liquid Mg/AC system through the formation of interfacial oxide phase MgO.

This work was carried out in the frame of the COST-Action "Advanced Engineering of aeroGels for Environment and Life Sciences" (AERoGELS, ref. CA18125) funded by the European Commission. Financial supports from the Institute of Metallurgy and Materials Science of Polish Academy of Sciences (Project No. Z-13) and University of Central Florida are acknowledged.