from the conferences organized by TANGER Ltd.
A significant number of reinforcing components are currently available for the manufacture of aluminum matrix composites. The justified selection of reinforcement determines not only the working capacity of the created composite materials under various operating conditions, but also the fundamental possibility of obtaining the composites by liquid-phase methods. The issues of thermodynamic compatibility of components are crucial in the design of aluminum matrix composites and cast products from them for specified operating conditions, as well as in the development of technological processes for their production. To assess the thermodynamic stability of compounds potentially suitable for reinforcing the aluminum matrix composites, distribution diagrams were constructed in the coordinates “formation enthalpy – melting temperature”. The initial data for the criterial analysis were collected from a wide range of sources and verified by comparing the values given by various researchers. According to thermodynamic stability criterion, the compounds distribution was carried out using carbides as an example. All compounds were divided into three groups: refractory thermodynamically stable (I), refractory thermodynamically unstable (II) and fusible (III). It was shown that preference should be given to compounds that are located in the group I. For the selected carbides, the thermodynamic probability of their interaction with the matrix melt was estimated, and the temperature ranges were determined in which the corresponding interfacial interaction reactions can occur spontaneously. According to the analysis, the nomenclature of carbide phases that are potentially stable in the aluminum melt was determined.
Keywords: Aluminum matrix composites, reinforcing phases, liquid-phase technologies, thermodynamic stability© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.