Chapter 9_Part_8

Chapter 9_Part_8 - Phase diagrams with intermetallic...

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36 MSE 2090: Introduction to Materials Science Chapter 9, Phase Diagrams Phase diagrams with intermetallic compounds Besides solid solutions, intermetallic compounds , that have precise chemical compositions can exist in some systems. When using the lever rules, intermetallic compounds are treated like any other phase, except they appear not as a wide region but as a vertical line. This diagram can be thought of as two joined eutectic diagrams, for Mg-Mg 2 Pb and Mg 2 Pb-Pb. In this case compound Mg 2 Pb can be considered as a component. intermetallic compound
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MSE 2090: Introduction to Materials Science Chapter 9, Phase Diagrams Eutectoid Reactions (I) The eutectoid ( eutectic-like in Greek) reaction is similar to the eutectic reaction but occurs from one solid phase to two new solid phases. Invariant point (the eutectoid) – three solid phases are in equilibrium. Upon cooling, a solid phase transforms into two other solid phases ( δ↔γ + ε in the example below) Looks as V on top of a horizontal tie line (eutectoid isotherm) in the phase diagram. Eutectoid
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 9_Part_8 - Phase diagrams with intermetallic...

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