Abstract
A high-temperature calorimeter is described with which the enthalpies of mixing of liquid alloys up to temperatures of 1050 °C can be directly determined. The integral enthalpies of mixing in the system Al-Ga obtained by this calorimeter are very small (maximum 160 cal/g-atom). Further, the phase diagram of this system was revised. Based on the obtained enthalpies of mixing an evaluation of the melt equilibria yielded the free enthalpies of mixing and the entropies of mixing of liquid Al-Ga alloys. The excess entropies are very small. The thermodynamic characteristics of the system are discussed with regard to the factors which determine them. Determination of the X-ray and the macroscopic density of aluminium-rich Al-Ga solid solutions permitted the calculation of the vacancy concentration of these alloys. The variation of the vacancy concentration with the alloy composition showed an anomaly which evidently is related to the filling of the Brillouin zones.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
