Phase Equilibria

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1、PartIIMaterialsScienceandMetallurgy2005-06C1PhaseEquilibriaDrRVKumar6Lectures(1houreach)+1ExamplesClass(2hours)Synopsis:Lawsofthermodynamics;equilibrium;reversibility;enthalpy,entropyandfreeenergyThermochemistry;variationofenthalpy,entropyandfreeenergychangesforareactionwithtemperatur

2、e;equilibriumconstantofachemicalreactionThermodynamicsofgasesandcondensedphasesolutions;Roult’slaw,activityandactivitycoefficients;Henry’slawanddilutesolution;multicomponentsolutionandinteractioncoefficients;determinationofactivityThermodynamicsofmixingofsolutions;Chemicalpotential;pa

3、rtialmolarproperties;Gibbs-Duhemequation;commontangentconstructionandequilibriumphasediagramsCaseStudies:Applicationofthermodynamicconceptsto(a)combustionreactions(b)gasesinmetalsand(c)aluminothermicreductionTextBooksandWebLinks:1.IntroductiontothethermodynamicsofMaterials-DRGaskell(T

4、aylor&Francis)2.ChemicalMetallurgy-JJMore(ButterworthHeinemann)3.DepartmentofMaterialsScience&MetallurgyWebpagelink:www.msm.cam.ac.uk/Teaching/andfollowthelinksthroughUndergraduateTeaching–OtherResourcesandLink–MATTER–Selectionofon-lineresourcesforMaterialsScience–steeluniversity.org(

5、arangeofrelevanttopicsunderThermodynamicsandKineticsavailablefromSiteContents)4.ExternallinkforInteractiveEllinghamdiagram:http://www.engr.sjsu.edu/ellingham/5.DepartmentofMaterialsScience&MetallurgyWebpagelinkforcoursematerialforthiscourse:www.msm.cam.ac.uk/Teaching/PtIIAB/C1.pdf1Lec

6、ture1C1(RVK)Inthiscoursewewillbeprimarilyconcernedwiththeapplicationofthermodynamicprinciplestosystemsundergoingchemicalreactions.Asystemmayconsistofoneormorephasesandeachphaseismadeupofoneormorecomponents(whicharechemicalspeciesoffixedcompositions).Asystemisinanequilibriumstatewhente

7、mperature,pressureandchemicalactivitygradientsareabsent,i.e.thesystemisinthermal,mechanicalandchemicalequilibrium.Bychangingoneormoreoftheabovevariables,reactionscanbeinducedandanewequilibriumstatemaybeachieved.Phasediagramsaregraphicalmeansbywhichphaseequilibriumwithinasystemisrepres

8、ented