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Determination of the Thermodynamic Stability of Intermetallic Compounds in Technical Aluminum

A wide range of intermetallic compounds of the Al-Ti, Al-Ni, Al-Zr, Al-Cr, Al-Fe, Al-V systems has been examined. The enthalpy of formation of intermetallic compounds in a wide temperature range has been calculated. The obtained values are attributed to one mole of the chemical compound. The dependences of the obtained values on the stoichiometric composition of chemical compounds with regard to their position on the state diagram are established. A comparative assessment of the stability of intermetallic compounds for each system has been conducted. A method of approximate calculation of the enthalpy of intermetallic compounds has been proposed.