Atomic site determination of a high-purity SiC grain boundary

2002 ◽  
Vol 82 (5) ◽  
pp. 857-866 ◽  
Author(s):  
E. Takuma ◽  
H. Ichinose
Keyword(s):  
Grain Boundary ◽  
High Purity ◽  
Atomic Site

Grain Boundary Diffusion of Fe in High-Purity Copper

2009 ◽  
Vol 289-292 ◽  
pp. 211-217 ◽  
Author(s):  
Jens Ribbe ◽  
Guido Schmitz ◽  
Sergiy V. Divinski
Keyword(s):  
Grain Boundary ◽  
High Purity ◽  
Dynamics Simulation ◽  
Interatomic Potentials ◽  
Radiotracer Technique ◽  
Exponential Factor ◽  
Reliable Determination ◽  
Pure Cu ◽  
Shed Light

Grain boundary (GB) diffusion of 59Fe in high purity polycrystalline copper was measured using the radiotracer technique and precision parallel sectioning in an extended temperature interval. The results of diffusion measurements below 900 K are consistent with Harrison's C kinetics and yield the GB diffusion coefficient of Fe in Cu with the pre-exponential factor of 5.610-6 m2/s and the activation enthalpy of 121 kJ/mol. Unexpectedly strong GB segregation of Fe in Cu hindered reliable determination of the Fe diffusivity in the B kinetics. Additionally, unconventional penetration profiles were measured for GB diffusion of 59Fe in Cu at high temperatures. Molecular dynamics simulation with the literature Finnis-Sinclair type interatomic potentials was performed to shed light into the observed features. A strong effect of the Fe coverage on GB structure and kinetics in pure Cu is predicted at increased temperatures above 900 K.

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

scholarly journals Development of decomposition techniques for the determination of trace impurities in high-purity ruthenium metal.

1999 ◽  
Vol 48 (9) ◽  
pp. 835-840 ◽  
Author(s):  
Masamitsu FUKUDA ◽  
Kazutoshi SHIMURA ◽  
Minoru TAKEYA
Keyword(s):  
High Purity ◽  
Decomposition Techniques ◽  
Trace Impurities
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