Eksperimentalno određivanje i termodinamičko modelovanje ravnotežnih dijagrama stanja trojnih sistema Ge-Sb-Ag i Ge-Sb-In
Experimental determination and thermodynamic modeling of the phase diagrams of Ge-Sb-Ag and Ge-Sb-In ternary systems
Author
Premović, Milena M.Mentor
Manasijević, DraganCommittee members
Minić, DuškoŽivković, Dragana
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Show full item recordAbstract
The results of experimental investigation and thermodynamic calculation of phase diagrams of Ge-Sb-Ag and Ge-Sb-In ternary systems are presented in this doctoral dissertation.
Experimental part of the work includes preparation of the samples of selected compositions and their investigation using methods of differential thermal analysis (DTA), scanning electron microscopy with energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), optical microscopy (LOM), measuring the hardness, microhardness and electric conductivity of alloys. Based on the obtained results characteristic phase transition temperatures, structural characteristics, phase compositions, mechanical properties and electric conductivity of the investigated alloys were determined.
Calculation of phase diagrams of ternary Ge-Sb-Ag and Ge-Sb-In systems was performed using CALPHAD method and the corresponding thermodynamic software (Pandat ver. 8.1). Calculated results include liquidus projections, invariant reaction...s, characteristic vertical and isothermal sections for both investigated ternary systems.
U doktorskoj disertaciji su izloţeni rezultati eksperimentalnog ispitivanja i termodinamiĉkog proraĉuna ravnoteţnih dijagrama stanja trojnih Ge-Sb-Ag i Ge-Sb-In sistema.
U eksperimentalnom delu doktorske disertacije izvršena je priprema legura odabranih sastava koje su zatim ispitivane primenom metoda diferencijalno termijske analize (DTA), skenirajuće elektronske mikroskopije sa energo-disperzivnom spektrometrijom (SEM-EDS), X-ray difraktometrije (XRD), optiĉke mikroskopije (LOM), kao i merenjem tvrdoće, mikrotvrdoće i elektroprovodljivosti. Na osnovu dobijenih rezultata utvrĊene su karakteristiĉne temperature faznih transformacija, strukturne karakteristike, fazni sastav ispitivanih legura, mehaniĉke osobine i elektroprovodljivost legura.
Proraĉun ravnoteţnih dijagrama stanja Ge-Sb-Ag i Ge-Sb-In sistema je izvršen primenom CALPHAD metode i odgovarajućeg termodinamiĉkog programa (Pandat ver. 8.1). Rezultati obuhvataju proraĉunate likvidus projekcije, invarijantne reakcije, karakterist...iĉne vertikalne i izotermalne preseke za oba trojna sistema.
Faculty:
Универзитет у Београду, Технолошко-металуршки факултетDate:
27-03-2015Projects:
- Advanced multicomponent metal systems and nanostructured materials with diverse functional properties (RS-172037)