ALUMINIUM ACTIVITY IN THE (alpha)Ti ALUMINIUM-TITANIUM SOLID ALLOYS BY EMF METHOD

摘要

The equilibrium EMF's were measured for the Al-Ti solid alloys in the region of alpha(Ti) phase by means of the concentration cells. Experiments were conducted at the temperatures 923 K, 1014 K, 1041 K and 1061 K and in the concentration range from X_(Al)= 0.0222 to 0.1237. Next, the temperature-concentration dependence of excess Gibbs energy of Al was worked out (Redlich-Kister relation) and used to calculate the partial and integral thermodynamic functions (excess Gibbs energy, enthalpy of solutions, excess entropy and activity of aluminium and titanium, integral enthalpy of mixing and excess entropy).