Accession Number : ADA136237

Title :   Monte Carlo Study of the Phase Diagrams of Binary Alloys with Face-Centered Cubic Lattice Structure.

Descriptive Note : Interim technical rept.,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J DEPT OF MATHEMATICS

Personal Author(s) : Binder,K ; Lebowitz,J L ; Phani,M K ; Kalos,M H

PDF Url : ADA136237

Report Date : Jan 1982

Pagination or Media Count : 42

Abstract : The authors describe the results of Monte Carlo computations of the coherent phase diagram (in the temperature-composition plane) of ordering binary alloys on a face-centered cubic lattice. Results on long- and short-range order parameters as well as ordering energies are also given. They consider the system with nearest neighbor interaction in the grand-canonical ensemble (equivalent to an Ising antiferromagnet in a magnetic field) as well as in the canonical ensemble (fixed composition. Results with next-nearest neighbor interaction are also given, and for both models a comparison with other available predictions is made, particularly with the cluster-variation method. While the latter is found to be quite accurate at stoichiometric composition, it appears to do less well in the more general case. The tetrahedral approximation of the cluster variation method predicts a topology of the phase diagram, in the case of nearest-neighbor interaction different from the computer simulations. Some consequences for the interpretation of the behavior of copper-gold alloys are indicated. (Author)

Descriptors :   *Monte Carlo method, *Computations, *Phase diagrams, *Binary alloys, Simple cubic lattices, Charts, Computerized simulation, Interactions, Magnetic fields, Copper alloys, Gold alloys, Stoichiometry

Subject Categories : Metallurgy and Metallography
      Numerical Mathematics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE