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12 - CIVE 2700 Civil Engineering Materials Winter 2007...

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CIVE 2700 – Civil Engineering Materials, Winter 2007 1 Phase Diagrams II Professor George Hadjisophocleous, Ph.D., P.Eng. Carleton University Department of Civil and Environmental Engineering Ottawa, Ontario CIVE 2700 – Civil Engineering materials, Winter 2007, 2.2 Outline Binary eutectic systems Iron systems
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CIVE 2700 – Civil Engineering Materials, Winter 2007 2 CIVE 2700 – Civil Engineering materials, Winter 2007, 2.3 Binary Eutectic systems A binary eutectic system has three single phase regions alpha, beta and liquid. – Alpha ( ! ): solid solution reach in copper, silver is the solute component and FCC structure. – Beta ( " ): solid solution reach in silver, copper is the solute and FCC structure. Solubility of alpha and beta is limited: at any temperature below the line BEG only a limited concentration of silver will dissolve in copper for the alpha phase and for copper in silver for the beta phase. CIVE 2700 – Civil Engineering materials, Winter 2007, 2.4 Binary Eutectic systems Eutectic means easily melted.
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