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Unformatted text preview: 1 ECE331 Phase Diagrams (concepts) 1. Phase A homogeneous portion of a material system that has uniform physical and chemical properties uniform physical and chemical properties. 2. Phase Boundary Boundaries that separate phases. So acrossing a phase boundary, there will be abrupt change in physical or/and chemical characteristics. Lu Single Phase System Homogeneous Systems with Two or More Phases - Heterogeneous ECE331 Phase Diagrams (concepts) 1. Phase Equilibrium Free energy is minimized or physical and chemical characteristics are time independent stable ) characteristics are time independent ( stable ). 2. Phase Diagram A diagram for a material system which reprensents the relationships between temperature, compositions, Lu quantities of phases at equilibrium. 2 ECE331 Phase Compositions 1. Single Phase Region Same with alloy composition. 2. Two-Phase Region Draw a tie-line; Two intersections to phase boundaries; Determine the corresponding compositions....
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This note was uploaded on 04/09/2010 for the course ECE 331 taught by Professor Rajan during the Spring '09 term at Ohio State.
- Spring '09