The eutectic composition on x1-x phase diagram: A molecular-dynamics studyA. Picinin1, M. A. P. Silva2, J. P. Rino2 and G. Q. Hai1
1 Instituto de Física de São Carlos, Universidade de São Paulo Av. Trabalhador Sancarlense 400, 13560-970, São Carlos, SP-Brazil
2 Departamento de Física, Universidade Federal de São Carlos 13565-905, São Carlos, SP-Brazil
received 5 April 2005; accepted in final form 4 July 2005
published online 3 August 2005
A eutectic composition was observed, for the first time using molecular-dynamics (MD) simulation, for the x1-x solid solutions. Simulations were performed on melting and cooling processes on these solid solutions for various compositions. It was observed that the initial addition of cadmium fluoride to the lead fluoride cubic lattice decreases the melting temperature of the resulting solid solution, leading to a eutectic composition with x=0.35, in perfect accord with experimental data. Solid solutions with higher cadmium concentrations present higher melting temperatures. Simulations on cooling from the melt, at various rates, indicate that the eutectic composition has a better glass-forming ability than the others compositions.
61.43.Bn - Structural modeling: serial-addition models, computer simulation.
65.40.-b - Thermal properties of crystalline solids.
66.30.-h - Diffusion in solids.
© EDP Sciences 2005