Etude thermodynamique du système AuSi

Thermodynamic description of the Au–Si–Sn system

“…Enthalpies of formation of the Au-Si alloys have been measured by calorimetry by Castanet et al [10] at 1373 K. Hassam and Gaune-Escard [20] measured enthalpies of mixing of liquid at 1423 and 1550 K. In light of the reported data, the dependence of mixing enthalpies on temperatures is not obvious.…”

“…The liquidus has been determined by thermal analysis [8][9][10] and metallographic observation in quenched alloys [11], which were generally consistent with each other. The eutectic point was measured by [8,9,[11][12][13][14][15][16][17][18] as listed in Table 1.…”

Determination calorimetrique des enthalpies de formation en metallurgie

“…Les limites des r6gions diphas~es correspondent aux changements de pente de l'enthalpie int6grale et aux discontinuit6s des enthalpies partielles/L la temp6rature de travail. Les figure 5 et 6 montrent les r6sultats obtenus 1270 K sur le syst6me Pd--Ge [18]. c) A T~< T< T~v2, la courbe HI(x) montre deux pics qui correspondent/t la formation des compos6s AB et ABz.…”

Stability of Interfaces in Gold-Silicon System Regarding Equilibrium Segregation

“…With respect to the already mentioned low eutectic temperature, strong interactions exist between the two elements in the liquid state (negative enthalpy of mixing), leading to short range order (negative entropy). In the absence of equilibrium solid state compounds, stability of the liquid solution is enhanced [7]. Small amounts of gold are known to increase the rate of epitaxial growth of amorphous silicon on monocrystalline substrates (solid state epitaxy) [8].…”