Thermodynamic and dynamical properties of liquid Al-X (X = Sn, Ge, Cu) systems

被引:4
作者
Odusote, Y. A. [1 ]
机构
[1] Fed Univ Technol Akure, Dept Phys, Condensed Matter Phys Res Grp, Akure, Nigeria
关键词
Composition; Enthalpy of mixing; Order energy; Viscosity; SURFACE-PROPERTIES; CONCENTRATION FLUCTUATIONS; ATOMIC TRANSPORT; VISCOSITY; ALLOYS; DIFFUSION; ALUMINUM; METALS; MODELS; BULK;
D O I
10.1016/j.jnoncrysol.2014.05.028
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A study of thermodynamics and dynamical properties of liquid Al-Sn, Al-Ge and Al-Cu alloys at different temperatures have been made within the frame of the Quasi-Lattice Theory (QLT) using the Flory's model. Assuming the order energy parameters as temperature dependent, the composition dependence of viscosity, eta, and various thermodynamic properties such as the free energy of mixing, enthalpy of mixing, entropy of mixing and activity coefficient of the liquid alloys have been calculated. The roles of size differences between constituent species in the alloys were examined. The study reveals that the order energy parameter omega is positive for Al-Sn alloys indicating existence of self-coordination of atoms across the composition range, while negative values of omega for Al-Ge and Al-Cu alloys suggest a tendency of compound formation (preference for unlike atoms to pair as nearest neighbor) in their liquid state. The study also shows that Al-Sn is a weak interacting system. This fact is further justified by the results of the estimated dynamical properties with a reasonable agreement between the calculated results and corresponding experimental data. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:96 / 100
页数:5
相关论文
共 31 条
[1]  
[Anonymous], 1995, INTERMETALLIC COMPOU
[2]   Temperature dependence of thermodynamic properties of Si-Ti binary liquid alloys [J].
Awe, O. E. ;
Odusote, Y. A. ;
Hussain, L. A. ;
Akinlade, O. .
THERMOCHIMICA ACTA, 2011, 519 (1-2) :1-5
[3]   CONCENTRATION FLUCTUATIONS AND PARTIAL STRUCTURE FACTORS OF COMPOUND-FORMING BINARY MOLTEN ALLOYS [J].
BHATIA, AB ;
HARGROVE, WH ;
THORNTON, DE .
PHYSICAL REVIEW B, 1974, 9 (02) :435-444
[4]   Viscosity measurement of liquid ternary Cu-Ni-Fe alloys by an oscillating cup viscometer and comparison with models [J].
Brillo, Juergen ;
Brooks, Rob ;
Egry, Ivan ;
Quested, Peter .
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2007, 98 (06) :457-462
[5]   Comparison of different theoretical models to experimental data on viscosity of binary liquid alloys [J].
Budai, I. ;
Benko, M. Z. ;
Kaptay, G. .
Materials Science, Testing and Informatics III, 2007, 537-538 :489-496
[6]   Analysis of literature models on viscosity of binary liquid metallic alloys on the example of the Cu-Ag system [J].
Budai, I ;
Benkö, MZ ;
Kaptay, G .
MATERIALS SCIENCE, TESTING AND INFORMATICS II, 2005, 473-474 :309-314
[8]   The viscosity of aluminium and its alloys - A review of data and models [J].
Dinsdale, AT ;
Quested, PN .
JOURNAL OF MATERIALS SCIENCE, 2004, 39 (24) :7221-7228
[9]   Thermodynamics of high polymer solutions [J].
Flory, PJ .
JOURNAL OF CHEMICAL PHYSICS, 1942, 10 (01) :51-61
[10]  
Hultgren R., 1973, Selected Values of Thermodynamic Properties of Elements