稀土金屬合金體系的相關(guān)系及相穩(wěn)定性的研究.pdf

1、湘潭大學(xué)碩士學(xué)位論文稀土金屬合金體系的相關(guān)系及相穩(wěn)定性的研究姓名：黃明華申請學(xué)位級別：碩士專業(yè)：材料物理化學(xué)指導(dǎo)教師：蘇旭平20000501湘潭大學(xué)碩士學(xué)位論文AbstractIIIntermetalliccompoundsformedbetweenRareEarths㈣andmetalsaleoneofthemostpromisingmaterials，whichhaveeminentphysicalpr唧刪es，suchasmagn

2、etism，magnetisminducedflexibilityandhydrogenstorageAtpresentlargeamountsofworkhasbeendonetoinvestigatetheslructuresandstabilitiesofthesecompoundsHoweverstudiesonthermodynamicpropertiesofthemalelimitedandexperimentaldataa

3、legreatlyscarceMoreoverthereisnocheckofconsistencybetweenthermodynamicdataandtheirsuggestedphasediagramsInthisstudy，theparametersofGibbsenergyfunctionsWele，comprehensivelyandsimultaneously，assessedandoptimizedwithdiffere

4、ntexperimentalinformationavailablebyselectingmodelsormodelingthesystemstobeinvestigatedinordertoconnectthephasediagraminformationwithotherthennodynanficdataThethermodynamicdescriptionsoftheGibbsenergyfunctionsofvariousph

5、aseswereobtainedThesefunctionscouldbestoredasthedatabaseofintermetalliccompoundsformedbetweenRa_neEarthsandmetalsthatcallprovidegoodservicefordesigningrareearthalloysandcralts，F(xiàn)orternaryorhi曲erordersystems，calculationofp

6、hasediagramsusingthermodynamicmodelscoupledwithexperimentaldataiseconomictoobtainthedescriptionofphaserelationsandthermodynamicinformationTheph眥diagramandthermodynamicdamofLaSn，PtSn，A邸candAPrbinaryalloysystemswerethermod

7、ynamicallyassessedusingtheadvancedcomputersoftwareTHERMOCALCConsistentsetsofthermodynamicparameterswefeobtainedandgoodagreementisderivedbetweenthecalclllatedandexperimentalresultsKeywords：Thermodynamics，Optimization，Asse