Diffusion coefficients in multiphase Ni80Cr20-Ti system

In this paper, the reactive diffusion in Ni80C20r?Ti ternary system is discussed at 1173K. The diffusion couple was prepared and annealed for 100 h. The two intermetallic phases and two two-phase zones occurred, namely: Ti2Ni, TiNi, TiNi+Cr, and TiNi3+Cr. Based on the experimental results (molar fra...

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Published inJournal of mining and metallurgy. Section B, Metallurgy Vol. 57; no. 1; pp. 137 - 144
Main Authors Wierzba, B., Serafin, D., Nowak, W.J., Wierzba, P., Ciecko, A., Mazurkow, A.
Format Journal Article
LanguageEnglish
Published Bor Technical Faculty Bor, University of Belgrade 2021
Technical Faculty, Bor
Subjects
Alloys
Annealing
Approximation
Coefficients
Diffusion
Equilibrium
Intermetallic compounds
Intermetallic phases
Mechanical properties
Methods
Morphology
ni80cr20-ti system
Nickel base alloys
Nickel compounds
reaction diffusion
Scanning electron microscopy
Ternary systems
Titanium compounds
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Summary:In this paper, the reactive diffusion in Ni80C20r?Ti ternary system is discussed at 1173K. The diffusion couple was prepared and annealed for 100 h. The two intermetallic phases and two two-phase zones occurred, namely: Ti2Ni, TiNi, TiNi+Cr, and TiNi3+Cr. Based on the experimental results (molar fractions, thicknesses of the intermetallic phases), the intrinsic diffusion coefficients of all components in each phase were numerically approximated. The Wagner method was used in the pure intermetallic phases. In the two phase zones the approximation was based on the generalized Darken and Wagner methods. The presented methods allowed for determination of the effective diffusion coefficients in each presented phase.
ISSN:1450-5339
2217-7175
DOI:10.2298/JMMB200311008W