Grain Boundary Diffusion and Grain Boundary Phase Transformations

1991 ◽  
Vol 66-69 ◽  
pp. 649-666
Author(s):  
Lasar S. Shvindlerman ◽  
Boris B. Straumal
Keyword(s):  
Grain Boundary ◽  
Phase Transformations ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Boundary Phase

A Unified Approach to Grain Boundary Diffusion and Nucleation in Thin Film Reactions

1994 ◽  
Vol 343 ◽  
Author(s):  
K. R. Coffey ◽  
K. Barmak
Keyword(s):  
Thin Film ◽  
Grain Boundary ◽  
Diffusion Couple ◽  
Alternative Model ◽  
Boundary Diffusion ◽  
Chemical Potential ◽  
Grain Boundary Diffusion ◽  
Boundary Phase ◽  
Decay Length ◽  
Product Phase

ABSTRACTAn alternative model is proposed to extend the conventional view of diffusion under a concentration gradient in a grain boundary phase of width δ. The conventional model is well developed and readily applied to the thickening kinetics of polycrystalline product phases in binary diffusion couples, however it is not readily extended to other phenomena of interest in thin films, i.e., the nucleation and growth of the product phase crystallites prior to formation of a product phase layer. In the alternative model presented here, non-equilibrium thermodynamics is used to define the chemical potentials, μi, for each atomic specie in the grain and interphase boundaries of a polycrystalline diffusion couple. The chemical potential difference for each specie between the bulk phases of the diffusion couple is partitioned between the driving force for grain boundary diffusion and that for interfacial reaction. This partition leads to a characteristic decay length that describes the spatial variation of μi. Numerical calculations of μi are used to show that boundary diffusion favors heterogeneous nucleation. Product nucleation in thin film reactions is seen to be similar to precipitation from a bulk solid solution.

Grain boundary diffusion and grain boundary structures of a Ni-Cr-Fe- alloy: Evidences for grain boundary phase transitions

2020 ◽  
Vol 195 ◽  
pp. 501-518 ◽  
Author(s):  
Sai Rajeshwari K. ◽  
S. Sankaran ◽  
K.C. Hari Kumar ◽  
Harald Rösner ◽  
Martin Peterlechner ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Boundary Phase

GRAIN BOUNDARY DIFFUSION OF BULK INTERSTITIALS IN ALPHA-ZIRCONIUM

1990 ◽  
Vol 51 (C1) ◽  
pp. C1-691-C1-696 ◽  
Author(s):  
K. VIEREGGE ◽  
R. WILLECKE ◽  
Chr. HERZIG
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion

Room-temperature grain boundary diffusion data measured from historical artifacts

2005 ◽  
Vol 96 (10) ◽  
pp. 1187-1192 ◽  
Author(s):  
Raymond J. Kremer ◽  
Mysore A. Dayananda ◽  
Alexander H. King
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Diffusion Data

Determination of grain-boundary diffusion of Ag in nanocrystalline Cu by the Hwang–Balluffi method

2001 ◽  
Vol 89 (7) ◽  
pp. 3971-3975 ◽  
Author(s):  
Z. Erdélyi ◽  
Ch. Girardeaux ◽  
G. A. Langer ◽  
D. L. Beke ◽  
A. Rolland ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion
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