Degeneracy of diffusion paths in ternary, two‐phase diffusion couples

1996 ◽  
Vol 79 (10) ◽  
pp. 7592-7595 ◽  
Author(s):  
P. Maugis ◽  
W. D. Hopfe ◽  
J. E. Morral ◽  
J. S. Kirkaldy
Keyword(s):  
Diffusion Couples ◽  
Two Phase ◽  
Phase Diffusion ◽  
Diffusion Paths

Interdiffusion Microstructure Maps for Two Phase Diffusion Couples

2000 ◽  
Vol 72 ◽  
pp. 105-110
Author(s):  
John Morral ◽  
Hui Min Chen ◽  
F. Meisenkothen
Keyword(s):  
Diffusion Couples ◽  
Two Phase ◽  
Phase Diffusion

An Examination of Diffusion Paths in Terms of Interdiffusion Fluxes and Interdiffusion Coefficients

2007 ◽  
Vol 266 ◽  
pp. 83-99 ◽  
Author(s):  
Kevin M. Day ◽  
Mysore A. Dayananda
Keyword(s):  
National Science Foundation ◽  
Single Phase ◽  
Diffusion Path ◽  
Diffusion Couples ◽  
Eigenvalues And Eigenvectors ◽  
Internal Constraints ◽  
Two Phase ◽  
Uphill Diffusion ◽  
Diffusion Paths ◽  
Interdiffusion Coefficients

Selected diffusion couples investigated in the Cu-based and Fe-based multicomponent systems are examined for diffusion path development, zero-flux planes, uphill diffusion, and internal constraints for diffusion paths. The couples are analyzed for interdiffusion fluxes and interdiffusion coefficients with the aid of the “MultiDiFlux” program. Eigenvalues and eigenvectors are also determined from the interdiffusion coefficients determined over various ranges of composition in the diffusion zone. Slopes of diffusion paths at selected sections, including the path ends, are related to interdiffusion coefficients, interdiffusion fluxes and/or eigenvectors. These relations are explored with selected single phase diffusion couples in the Cu-Ni-Zn and Fe-Ni-Al systems and the calculated path slopes are compared with those directly determined from the concentration profiles. Relations between the gradient of interdiffusion flux and the concentration gradient are examined for each component in a two-phase Cu-Ni-Zn diffusion couple. The research is supported by the National Science Foundation.

On zigzag shaped diffusion paths in multi-phase diffusion couples

2001 ◽  
Vol 44 (3) ◽  
pp. 415-421 ◽  
Author(s):  
Martin Schwind ◽  
Thomas Helander ◽  
John Ågren
Keyword(s):  
Diffusion Couples ◽  
Phase Diffusion ◽  
Diffusion Paths ◽  
Multi Phase

The Sequence of the Phase Growth during Diffusion in Ti-Based Systems

2019 ◽  
Vol 38 (2019) ◽  
pp. 151-157 ◽  
Author(s):  
Bartek Wierzba ◽  
Wojciech J. Nowak ◽  
Daria Serafin
Keyword(s):  
Theoretical Analysis ◽  
Entropy Production ◽  
Diffusion Coefficients ◽  
Intermetallic Phase ◽  
Intermetallic Phases ◽  
Diffusion Couples ◽  
Intrinsic Diffusion ◽  
Phase Growth ◽  
Diffusion Paths

AbstractThe interdiffusion in Ti-based alloys was studied. It was shown that during diffusion at 1,123 K formation of four intermetallic phases occurs. The diffusion paths for six different diffusion couples were determined. Moreover, the entropy production was calculated – the approximation used for determination of the sequence of intermetallic phase formation. In theoretical analysis, the intrinsic diffusion coefficients were determined from the modified Wagner method.

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