Cu-Mo-X(X：Er，Ni，Si，Th)三元系相平衡的熱力學計算.pdf

1、廈門大學碩士學位論文CuMoX（X：Er，Ni，Si，Th）三元系相平衡的熱力學計算姓名：李貽甫申請學位級別：碩士專業(yè)：材料學指導教師：王翠萍20071201碩士學位論文ABSTRACTAbstractTheCuMobasealloyshavewidelybeenusedasautomotiveandelectronicmaterialsduetotheirhighthermalandelectricalconductivities，l

2、owcoefficientsofthermalexpansion，specialhigh—temperatureperformance，non—magnetic，lowgascontent，goodvacuumandmachiningpropertiesInordertoimprovethealloyproperties，optimizealloycompositionsandprocessing，it’Snecessarytoinve

3、stigatethephasediagramsandthermodynamicpropertiesoftheinvolvedsystemsInthispaperexperimentalinvestigationandthermodynamiccalculationwerecarriedoutonthephaseequilibriaofCuMoX(X：Ni，Si，Th，Er)systemasfollowings：(1)Thephaseeq

4、uilibriaoftheCu—MoNiternarysystematl100。C，1200。Cand1300“CandCuMoSiternarysystemat1100。Cand1200。ChavebeenexperimentallydeterminedbyusingtheopticalmicroscopeandEDStechniques(2)TheCu—Th，Mo—Th，Cu—ErandMo—Erfourbinarysystemsa

5、ndCuMo—X(X：Ni，Si，Th，Er)fourternarysystemshavebeenoptimizedusingtheCALPHADmethodasfollowing：(a)TheCuTh，MoTh，CuErandMo—ErfourbinarysystemswereoptimizedbyusingtheavailableexperimentalinformationThecalculatedphasediagramsand

6、thermodynamicpropertiesagreewellwiththeexperimentaldata(b)Onthebasisofexperimentalphaseequilibriadataoftheternarysystemsobtainedbythisworkandlectures，theCu—MoNiandCuMo—SiternarysystemswereassessedandoptimizedAsetofselfco

7、nsistent，reasonableandreliablethermodynamicparameterswereobtained，whichdescribestheGibbsfleeenergiesofthesolutionphasesandtheintermediatephasesThecalculatedresultsofCu—Mo—NiandCuMo—Sitemarysystemsareingoodagreementswitht