Direct Determination of Grain Boundary Diffusion Coefficients and Segregation Factors of Se and Au Tracers in Cu - Polycrystals from Diffusion Measurements in Type-C and Type-B Regimes

1995 ◽  
Vol 41 ◽  
pp. 113-120
Author(s):  
T. Surholt ◽  
Yuri M. Mishin ◽  
Christian Herzig
Keyword(s):  
Grain Boundary ◽  
Diffusion Coefficients ◽  
Boundary Diffusion ◽  
Direct Determination ◽  
Grain Boundary Diffusion ◽  
Type B ◽  
Type C

scholarly journals Determination of Grain Boundary Diffusion Coefficients in C-Regime by Hwang-Balluffi Method: Silver Diffusion in Pd

2009 ◽  
Vol 289-292 ◽  
pp. 763-767 ◽  
Author(s):  
Z. Balogh ◽  
Z. Erdélyi ◽  
Dezső L. Beke ◽  
Alain Portavoce ◽  
Christophe Girardeaux ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Diffusion Coefficients ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Controlled Processes ◽  
Diffusion Controlled ◽  
Arrhenius Function ◽  
Data Points ◽  
Accumulation Kinetics

Diffusion controlled processes play a crucial role in the degradation of technical materials. At low temperatures the most significant of them is the diffusion along grain boundaries. In thin film geometry one of the best methods for determining the grain boundary (GB) diffusion coefficient of an impurity element is the Hwang-Balluffi method, in which a surface sensitive technique is used to follow the surface accumulation kinetics. Results of grain boundary diffusion measurements, carried out in our laboratory by this method in three different materials systems (Ag/Pd, Ag/Cu and Au/Ni) are reviewed. In case of Ag diffusion along Pd GBs the surface accumulation was followed by AES method. The data points can be well fitted by an Arrhenius function with an activation energy Q=0.99eV

Parametric Analysis of the Classification of Harrison Kinetics Regimes in Grain Boundary Diffusion

2010 ◽  
Vol 297-301 ◽  
pp. 1226-1231 ◽  
Author(s):  
Irina V. Belova ◽  
Graeme E. Murch ◽  
Thomas Fiedler
Keyword(s):  
Grain Boundary ◽  
Transition Point ◽  
Boundary Diffusion ◽  
Diffusion Problem ◽  
Grain Boundary Diffusion ◽  
Type B ◽  
Intermediate Type ◽  
Simulated Concentration ◽  
Type C

Recently, the transition point between the Harrison Type-A and Type-B kinetics regimes as well as the emerging intermediate AB transition regime have been analysed in detail by making use of Lattice Monte Carlo (LMC) simulations of tracer depth concentration profiles as a function of diffusion time and distance between grain boundaries e.g. [1-3]. In the present study, we analyse Harrison Type-B to Type-C kinetics regimes in the transient grain boundary diffusion problem using the parallel slabs model and LMC numerical simulation. The transition point where the Harrison Type-B kinetics regime last occurs (transition point between the Harrison Type-B kinetics and the Type-BC kinetics) is estimated at  (= 0.5δ(Dlt)-1/2) = 0.1. The Harrison Type-C grain boundary diffusion kinetics regime is also analysed using LMC simulated concentration depth profiles. The transition point where the Harrison Type-C kinetics regime first occurs (transition point between the Type-BC kinetics and the Harrison Type-C kinetics) is estimated at  = 5.0. Therefore an intermediate Type-BC regime can be expected to occur between 0.1 <  < 5.0. Preliminary results for the cubic grain model show that the interval for the intermediate Type-BC regime is somewhat narrower for this model and occurs at 0.5 <  < 5.0.

Determination of grain-boundary diffusion coefficients by Auger electron spectroscopy

2000 ◽  
Vol 162-163 ◽  
pp. 213-218 ◽  
Author(s):  
Z. Erdélyi ◽  
Ch. Girardeaux ◽  
G.A. Langer ◽  
L. Daróczi ◽  
A. Rolland ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Auger Electron Spectroscopy ◽  
Diffusion Coefficients ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion
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