Mixing Enthalpies of Melts and Thermodynamic Assessment of the Cu-Fe-Cr System

M.A.Turchanin,
 
A.A.Bondar,
 
L A.Dreval,
 
A.R.Abdulov,
 
P.G.Agraval
 

Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2014, #01/02
http://www.materials.kiev.ua/article/1188

Abstract

The mixing enthalpies of ternary liquid alloys in the Cu–Fe–Co system have been studied by calorimetric method at 1873 K and xCr = 0–0.45. The phase relations in the Cu–Fe–Cr system have been examined using the methods of physicochemical analysis. The thermodynamic assessment of the ternary system has been carried out in the frameworks of the CALPHAD method. The set of self-consistent parameters of thermodynamic models of the phases has been obtained taking into account experimental data of the present work and information on the phase transformations. The isothermal and vertical sections of the phase diagram, as well as liquidus, solidus, and metastable miscibility surfaces of the supercooled liquid alloys have been calculated. The undercooling degrees for the metastable liquid phase separation have been assessed. The composition ranges for the formation of alloys with special structures have been predicted. The temperature–composition ranges for the formation of the supersaturated solid solutions during liquid quenching have been assessed.


CALORIMETRY, CORE-TYPE STRUCTURE, CU–FE–CR ALLOYS, DISPERSED DROPLET STRUCTURE, MIXING ENTHALPY, STATE DIAGRAM, THERMODYNAMIC MODELING, THERMODYNAMIC PROPERTIES