Ternary phase diagram calculations. II. Examples of clustering and ordering systems
The Cluster Variation method with Natural Iteration Algorithm is used to compute isothermal sections of several typical phase diagrams for clustering and ordering ternary fcc solid solutions, given as only input, the three nearest-neighbor pair interaction parameters. A comparison is made with phase diagrams corresponding to Meijering's eight regular solution categories. In categories IA--IIIB, ordering must take place at sufficiently low temperature so that ordered phase regions must interact with miscibility gap boundaries, as shown by means of several examples calculated here in the nearest-neighbor tetrahedron cluster variation approximation. The chemical potential diagrams are also shown, and the orthogonality theorem is proved which says that a tie line is perpendicular to the chemical potential curve at the corresponding point.
- Research Organization:
- Univ. of California, Los Angeles
- OSTI ID:
- 7301143
- Journal Information:
- Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 25:2; ISSN AMETA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
656000 -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIAGRAMS
DISPERSIONS
EQUATIONS
FCC LATTICES
MATHEMATICAL MODELS
MIXTURES
PHASE DIAGRAMS
SOLID SOLUTIONS
SOLUTIONS
TERNARY ALLOY SYSTEMS