Fazne ravnoteže u Bi-Cu-Ni ternarnom sistemu proucavane su
eksperimentalnim metodama (SEM-EDS, DTA i DSC), kao i analiticki primenom
CALPHAD metode.
Proracun ravnotežnih faznih dijagrama u Bi-Cu-Ni sistemu izveden je na osnovu
optimiziranih termodinamickih parametara za sastavne binarne sisteme i dodatnih
termodinamickih parametara, odredenih u ovom radu. Proracunati fazni dijagrami
izotermalnih preseka na 300oC, 400oC i 500oC uporedeni su sa eksperimentalnim
rezultatima iz literature i ustanovljeno je dobro medusobno slaganje. Definisani su
ternarni termodinamicki parametri za tecnu fazu, i BiNi fazu u kojima je uzeta u obzir
eksperimentalno potvrdena rastvorljivost bakra u BiNi fazi. Proracunati fazni dijagrami
tri vertikalna preseka uporedeni su sa DTA/DSC rezultatima iz ovog rada.
Odredene su tvrdoca i elektricna provodljivost kao dopunska karakterizacija
legura ispitivanog Bi-Cu-Ni ternarnog sistema.Phase equilibria in the Bi-Cu-Ni ternary system have been studied
experimentally using SEM-EDS, DTA and DSC methods, and analytically using
CALPHAD method.
Calculation of equilibrium phase diagrams of Bi-Cu-Ni system was performed
using optimized thermodynamic parameters of the constituent binary systems and
additional thermodynamic parameters determined in this study. Calculated isothermal
sections at 300oC, 400oC and 500oC were compared with experimental results from the
literature and good agreement is found. Ternary thermodynamic parameters for the
liquid phase were determined, as well as for the BiNi phase, in which the experimental
confirmation of copper solubility in BiNi phase was taken into account. Three
calculated vertical sections were compared with the DTA/DSC results from this work.
Hardness and electrical conductivity as an additional characterization of the
investigated alloys of Bi-Cu-Ni ternary system were determined
