Analysis of the Cermak–Rothova method for determining the concentration dependence of ternary interdiffusion coefficients with a single diffusion couple

2014 ◽  
Vol 76 ◽  
pp. 5-8 ◽  
Author(s):  
K. Cheng ◽  
W. Chen ◽  
D. Liu ◽  
L. Zhang ◽  
Y. Du
Keyword(s):  
Diffusion Couple ◽  
Concentration Dependence ◽  
Interdiffusion Coefficients

Concentration dependence of interdiffusion coefficients in Cu-Fe-Ni system

2013 ◽  
Vol 114 (1) ◽  
pp. 54-62 ◽  
Author(s):  
Ü. Ugaste ◽  
A. A. Kodentsov ◽  
F. J. J. van Loo
Keyword(s):  
Concentration Dependence ◽  
Interdiffusion Coefficients

Interdiffusion in Nb-Mo, Nb-Ti and Nb-Zr Systems

2012 ◽  
Vol 323-325 ◽  
pp. 491-496 ◽  
Author(s):  
Soma Prasad ◽  
Aloke Paul
Keyword(s):  
Activation Energy ◽  
Diffusion Coefficient ◽  
Diffusion Couple ◽  
Impurity Diffusion ◽  
Impurity Diffusion Coefficient ◽  
Different Temperatures ◽  
Diffusion Couple Technique ◽  
Interdiffusion Coefficients

Diffusion couple technique is used to study interdiffusion in Nb-Mo, Nb-Ti and Nb-Zr systems. Interdiffusion coefficients at different temperatures and compositions are determined using the relation developed by Wagner. The change in activation energy for interdiffusion with composition is determined. Further, impurity diffusion coefficient of the species are determined and compared with the available data in literature.

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

10.30544/308 ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 197-211 ◽  
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.

Determination of interdiffusion coefficients of Si and Al in Ti 3 SiC 2 –Ti 3 AlC 2 diffusion couple at 1373‐1673 K

2019 ◽  
Vol 103 (1) ◽  
pp. 670-680
Author(s):  
Zerong Zhang ◽  
Xiaohui Yin ◽  
Yuhai Qian ◽  
Jingjun Xu ◽  
Jun Zuo ◽  
...  
Keyword(s):  
Diffusion Couple ◽  
Interdiffusion Coefficients

Concentration Dependence of the Interdiffusion Coefficients in Molten Alkali Nitrate — Silver Nitrate Mixtures

1983 ◽  
Vol 38 (8) ◽  
pp. 885-889 ◽  
Author(s):  
A. Hahne ◽  
J. Richter
Keyword(s):  
Silver Nitrate ◽  
Wave Front ◽  
Concentration Dependence ◽  
Mole Fraction ◽  
Diffusion Coefficients ◽  
Composition Dependence ◽  
Plane Source ◽  
Initial Plane ◽  
Interdiffusion Coefficients

Abstract To measure the composition dependence of the interdiffusion coefficients in molten mixtures of alkali nitrates and silver nitrate, a wave-front-shearing interferometer, together with an initial “plane source” was used.With this technique, the diffusion coefficients were measured in nearly differential steps in the three mixtures (Na,Ag)NO3 , (K,Ag)NO3 , and (Rb,Ag)NO3 at 300°C. The composition dependence of the diffusion coefficients D of all three systems could be described by parabolas of the formD = a + b x 2 + c x22,where x2 denotes the mole fraction of the silver nitrate. The three coefficients a,b, and c all show a clear proportionality to the radii of the akali ions. Thus an extrapolation to the not measured systems (Li, Ag)NO3 and (Cs, Ag)NO3 was possible.

The Effective Interdiffusion Coefficients in Experimental Investigations of Interdiffusion in Ternary Systems

2005 ◽  
Vol 237-240 ◽  
pp. 121-126 ◽  
Author(s):  
Ü. Ugaste
Keyword(s):  
Diffusion Couple ◽  
Ternary Systems ◽  
Diffusion Path ◽  
Experimental Investigations ◽  
Ternary Diffusion ◽  
Ternary Diffusion Couple ◽  
Interdiffusion Process ◽  
Variable Diffusion ◽  
Diffusion Paths ◽  
Interdiffusion Coefficients

The application of the effective interdiffusion coefficients for describing the interdiffusion process in ternary systems is discussed. It is shown that the relative values of effective interdiffusion coefficients, which are directly related to the diffusion path developed in a given diffusion couple, are responsible for deviation of the diffusion paths from linearity. The relationship between effective interdiffusion coefficients and partial (intrinsic) coefficients in ternary systems is analysed. It is shown that Boltzmann’s solution for diffusion equation with variable diffusion coefficient by means of relatively easy calculation procedure gives reliable results for the calculation concentration distributions in a ternary diffusion couple.

Interdiffusion Between Mo and TiAl

1992 ◽  
Vol 273 ◽  
Author(s):  
Min-Xian Zhang ◽  
Ker-Chang Hsieh ◽  
Y. Austin Chang
Keyword(s):  
Diffusion Couple ◽  
Diffusion Coefficients ◽  
Intrinsic Diffusion ◽  
The Cross ◽  
Two Phases ◽  
Interdiffusion Coefficients

ABSTRACTDiffusion couple experiments were carried out for Mo/γ-TiAl at 900, 1000 and 1100°C for periods of time ranging from 121 to 553 hrs. Using the Boltzmann-Matano analysis, the two diagonal interdiffusion coefficients for the two phases formed in these couples were obtained assuming the cross diagonal terms to be negligible. These two phases are δ-(Mo, Ti)3Al and β-(Mo,Al)Ti. The three intrinsic diffusion coefficients were also obtained using the Darken-type relationships between the interdiffusion and intrinsic diffusion coefficients. The calculated interdiffusion coefficients from the three intrinsic diffusion coefficients are in reasonable accord with those obtained directly from the Boltzmann-Matano analysis.

Lattice Structures of AlSc and their Effect on Interdiffusion

2013 ◽  
Vol 747-748 ◽  
pp. 9-13 ◽  
Author(s):  
Juan Li ◽  
Feng Ye ◽  
Li Huang ◽  
Yong Feng Liang
Keyword(s):  
Diffusion Couple ◽  
Lattice Structures ◽  
Main Factors ◽  
Interdiffusion Coefficients ◽  
B2 Structure

The structures of AlSc with 50at.% and 55at.% Sc were investigated. It was shown that orthorhombic AlSc is formed at Sc 50at.%, and B2 AlSc at Sc 55at.%. After anealing above 1100 °C, the orthorhombic AlSc transited into B2 structure, which indicated that B2 AlSc can also be a metalstable phase in the alloy with Sc less than 50at.%. The effects of these two structures on the phases formation via inter-diffusion were also studied using diffusion couple with titanium and γ-TiAl. It was found that the interdiffusion coefficients are the main factors for Ti/AlSc and structures are the main factors for γ-TiAl/AlSc.

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