A switch-over model of periodic structure formation in ternary diffusion couples

We developed a method of rigorous solution of the Onsager’s flow equations using moments of the interdiffusion-parameter integrands for the determination of average ternary interdiffusion coefficients. The analysis developed by Dayananda and Sohn [1] is the basis for this refined approach. Average main and cross interdiffusion coefficients are determined over selected regions in the diffusion zone using the diffusion-distance moments of the interdiffusion flux flow equations. Thermodynamic stability of solid solutions in the light of interdiffusion phenomenon is taken as validation criteria to identify accurate and reliable values of the ternary interdiffusion coefficients. Regulations are proposed for successful application of the analysis method to various ternary diffusion couples in Ni- and Fe-based intermetallics.

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Application of numerical inverse method in calculation of composition-dependent interdiffusion coefficients in finite diffusion couples

Metallurgical and Materials Engineering ◽

10.30544/308 ◽

2017 ◽

Vol 23 (3) ◽

pp. 197-211 ◽

Cited By ~ 3

Author(s):

Yuanrong Liu ◽

Weimin Chen ◽

Jing Zhong ◽

Ming Chen ◽

Lijun Zhang

Keyword(s):

Diffusion Couple ◽

Inverse Method ◽

Diffusion Path ◽

Diffusion Couples ◽

Ternary Diffusion ◽

Inverse Approach ◽

Ternary Diffusion Couple ◽

Composition Profiles ◽

Standard Sets ◽

Interdiffusion Coefficients

The previously developed numerical inverse method was applied to determine the composition-dependent interdiffusion coefficients in single-phase finite diffusion couples. The numerical inverse method was first validated in a fictitious binary finite diffusion couple by pre-assuming four standard sets of interdiffusion coefficients. After that, the numerical inverse method was then adopted in a ternary Al-Cu-Ni finite diffusion couple. Based on the measured composition profiles, the ternary interdiffusion coefficients along the entire diffusion path of the target ternary diffusion couple were obtained by using the numerical inverse approach. The comprehensive comparisons between the computations and the experiments indicate that the numerical inverse method is also applicable to high-throughput determination of the composition-dependent interdiffusion coefficients in finite diffusion couples.

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Kinetics and mechanism of periodic structure formation at SiO2/Mg interface

Acta Materialia ◽

10.1016/j.actamat.2006.05.048 ◽

2006 ◽

Vol 54 (18) ◽

pp. 4677-4684 ◽

Cited By ~ 37

Author(s):

I GUTMAN ◽

I GOTMAN ◽

M SHAPIRO

Keyword(s):

Structure Formation ◽

Periodic Structure ◽

Kinetics And Mechanism

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Nano-periodic structure formation on titanium thin film with a Femtosecond laser

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj2.119.898 ◽

2011 ◽

Vol 119 (1395) ◽

pp. 898-901 ◽

Cited By ~ 5

Author(s):

Nan WU ◽

Zhenxuan WANG ◽

Xi WANG ◽

Yasuhiko SHIMOTSUMA ◽

Masayuki NISHI ◽

...

Keyword(s):

Thin Film ◽

Femtosecond Laser ◽

Structure Formation ◽

Periodic Structure ◽

Titanium Thin Film

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Morphological and Crystallographic Characterizations of the Ca-Mg-Zn Intermetallics Appearing in Ternary Diffusion Couples

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.409.387 ◽

2011 ◽

Vol 409 ◽

pp. 387-392 ◽

Cited By ~ 1

Author(s):

Yi Nan Zhang ◽

Dmytro Kevorkov ◽

Florent Bridier ◽

Mamoun Medraj

Keyword(s):

Diffusion Zone ◽

Crystal Orientation ◽

Morphological Evolution ◽

Morphological Characteristics ◽

Diffusion Couples ◽

Ternary Diffusion ◽

Orientation Relations ◽

Quantitative Electron Probe Microanalysis ◽

Multi Phase ◽

Electron Back Scattered Diffraction

In the present research, seven multi-phase diffusion couples, with terminal alloys having different microstructural features, were prepared and annealed for 4 weeks at 335°C. The phase relations and change of morphological characteristics of each phase were studied along the diffusion zone by means of scanning electron microscopy/energy dispersive X-ray spectroscopy and quantitative electron probe microanalysis. Depending on the different terminal compositions of the diffusion couples, the morphological evolution in the diffusion zone can be: tooth-like, matrix phase with isolated and/or dendritic precipitates. Electron back-scattered diffraction analysis was carried out to investigate the crystal orientation of the ternary compounds and the crystal orientation relations at the interface of the diffusion zones.

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Cross-interaction between Au and Cu in Au/Sn/Cu ternary diffusion couples

Journal of Electronic Materials ◽

10.1007/bf02692458 ◽

2006 ◽

Vol 35 (2) ◽

pp. 366-371 ◽

Cited By ~ 21

Author(s):

C. W. Chang ◽

Q. P. Lee ◽

C. E. Ho ◽

C. R. Kao

Keyword(s):

Diffusion Couples ◽

Ternary Diffusion

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Calculating of Diffusion Profiles in Ternary Systems Using Effective Interdiffusion Coefficients of Components

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.333.73 ◽

2013 ◽

Vol 333 ◽

pp. 73-82

Author(s):

Ü. Ugaste ◽

J. Priimets

Keyword(s):

Good Accuracy ◽

Ternary Systems ◽

Concentration Profiles ◽

Diffusion Couples ◽

Ternary Diffusion ◽

Variable Diffusion Coefficient ◽

Ternary Diffusion Couple ◽

Variable Diffusion ◽

Interdiffusion Coefficients ◽

Diffusion Profiles

A method has been developed for calculating diffusion profiles in ternary systems by using effective interdiffusion coefficients of components and Boltzmanns solution for diffusion equation with variable diffusion coefficient. Using this method the concentration profiles for several diffusion couples in the systems Fe-Co-Ni and Cu-Fe-Ni are calculated as examples and some peculiarities of these calculations are discussed, particularly, how to solve some possible difficulties, which may sometimes arise at calculation procedures. It is shown that having the data on effective interdiffusion coefficients and their concentration dependence for at least two components in a ternary diffusion couple, the concentration profiles for all three components can be calculated with good accuracy.

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