Title of article :
Calculation of metastable free-energy diagrams and glass formation in the Mg–Cu–Y alloy and its boundary binaries using the Miedema model
Author/Authors :
J.A. and Hojvat de Tendler، نويسنده , , R. and Soriano، نويسنده , , M.R. and Pepe، نويسنده , , M.E. and Kovacs، نويسنده , , J.A. and Vicente، نويسنده , , E.E. and Alonso، نويسنده , , J.A.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
11
From page :
297
To page :
307
Abstract :
We have extended Miedemaʹs model to the modelling of free-energy diagrams in ternary alloys and applied the extended model to obtain a thermodynamic characterization of the glass formation range in Mg–Cu–Y. A structural term has been added in the calculation of the free energy of formation of solid solutions. By assuming that amorphization competes with formation of the hcp and fcc solid solutions, we have evaluated the region of compositions in which the system can be amorphized by quenching or casting of the liquid alloy. Equations of analytical geometry are proposed to search for regions of coexistence of amorphous and solid solutions, which could not be found for this ternary alloy. Heats of glass crystallisation have been calculated. The results of our model are in reasonable agreement with experimental data.
Keywords :
A. Ternary alloy systems , B. Glasses , metallic , prediction , E. Phase stability
Journal title :
Intermetallics
Serial Year :
2006
Journal title :
Intermetallics
Record number :
1503010
Link To Document :
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