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ORANGE EKSTRAKLASA
Dołączył: 22 Lip 2010
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Wysłany: Pią 1:08, 19 Lis 2010 |
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Crystal model with the characteristics of Ta-W phase diagram
, Indicating that disordered Ta-w solid solution more stable. Figure 1 uses the characteristics of the crystal model (a) and CALPHAD model (b) Calculation of Ta-w phase diagram Fig. 1CalculatedTa-WphasediagramwitlIcharacteristiccrystalmodelandCALPHADmodelMolcfi'actionWMolcfractionW Figure 2 at different temperatures, liquid ordered and disordered alloys and the Gibbs free energy curve of Fig. 2MolarGibbsenergyofTa-WalloysasfunctionofWconcentrationandatvarioustemperatures Rare 29 Volume 5 Conclusions 1. Crystal model based on features, select the description Ta. w phase diagram of thermodynamic interaction equation, and determine which of the parameters. 2. Using a set of parameters describing disordered and ordered Ta. w alloy thermodynamics and explain disordered Ta. w solid solution more stable. References: [1] hrryKallfmsl1. Coupledthermochemicalandphasediagzamdatafortantrumbasedbinaryalloys [J]. Calphad, 1991,15 (3): 243. Kaufman,[link widoczny dla zalogowanych], TurchiPEA, HuangWeiming. ThermedynamicsoftheCr-Ta-WsystembycombiningtheAbinitioandCALPH ・ ADmethods [J]. Calphad,[link widoczny dla zalogowanych], 2001,[link widoczny dla zalogowanych],25 (3): 419. TurchiPEA, GonisA. First-principledstudyofstabilityandlocalorderinsubstitutionalTa-Walloys [J]. PhysicalReviewB ,[link widoczny dla zalogowanych],2001,64:085112-1. Xie Y Q.. Metal System Science [M]. Hunan: Central South University Press. 1998.1. KitfleC. IntroductiontoSolidStatePhysics [M]. 6thedition, NewYork: Wiley, 1986.1. DinsadeAT. SGTEdataforpuremetals [J]. Calphad, 1991,15:412. CalculationofTa ・ WPhaseDiagramBasedonCharacteristicCrystalModelLiXiaobo, XieYouqing, YuFangxin '(DepartmentofMaterialsScienceandEngineering,[link widoczny dla zalogowanych], CentralSouthUniversity, Changsha410083, China) Abstract-ThethermodynamicpropertiesoftheTa-Wthermodynamicparameterswasobtainedtakingintosystemwereevaluatedbyusingacharacteristiccrystalconsiderationofrelevantexperimentaldata. Thesta-modeltodescribetheGibbsenergiesofvariousphaseilityofthedisorderedandorderedphasesinthissys-includingbothdisorderedandorderedphases. Asetoftemwasalsodiscussed. Keywords: Ta-Wsystem; phasediagram; characteristiccrystalmodel; thermodynamic
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