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  4. № 05/06 2017
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THERMODYNAMIC PROPERTIES OF BINARY Al–Nd ALLOYS

M.O.Shevchenko,
 
V.Sudavtsova,
 
V.G.Kudin,
 
L.Romanova,
 
M.Ivanov
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2017, #05/06
http://www.materials.kiev.ua/article/2391

Abstract

The mixing enthalpies of liquid alloys of the binary Al–Nd system are determined in the ranges 0 < xNd < 0.25 at 1500–1740 K, 0.4 < xNd < 0.66 at 1670–1740 K, and 0.66 < xNd < 1 at 1450–1500 K by isoperibol calorimetry. The melts of the binary Al–Nd system are characterized by significant negative mixing enthalpies: = –44.6 kJ/mol at xNd = 0.34 and 1500 K (extrapolation to the overcooled melt region). Activities of components, entropies, Gibbs energies, and liquidus curve of the binary Al–Nd phase diagram were evaluated using the model of ideal associated solutions.


ACTIVITIES OF COMPONENTS, BINARY AL–ND SYSTEM, ENTROPY, GIBBS FREE ENERGY, IDEAL ASSOCIATED SOLUTION MODEL, ISOPERIBOL CALORIMETRY, LIQUIDUS, MIXING ENTHALPY

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