SELF-DIFFUSION AT SILVER SURFACES

1952 ◽  
Vol 30 (5) ◽  
pp. 422-429 ◽  
Author(s):  
W. C. Winegard ◽  
B. Chalmers
Keyword(s):  
Single Crystals ◽  
Surface Diffusion ◽  
Surface Preparation ◽  
Surface Shape ◽  
Vacancy Mechanism ◽  
High Concentration ◽  
Self Diffusion ◽  
Lattice Vacancy ◽  
Silver Surfaces ◽  
Lattice Vacancies

The surface self-diffusion of silver on specific crystallographic surfaces of silver single crystals and on polycrystalline specimens was investigated. Various methods of surface preparation were used and the general conclusion was reached that surface diffusion is accelerated during changes of surface shape. The theory is advanced that "surface" diffusion takes place by a lattice vacancy mechanism; an abnormally high concentration of lattice vacancies is believed to be necessary for changes of surface shape to occur. This accounts for the accelerated surface diffusion observed under these conditions.

Self-Diffusion in Tin Crystals

1950 ◽  
Vol 3 (1) ◽  
pp. 91 ◽  
Author(s):  
PJ Fensham
Keyword(s):  
Single Crystals ◽  
Diffusion Coefficients ◽  
Vacancy Mechanism ◽  
Self Diffusion ◽  
Active Isotope

The rate of self-diffusion in single crystals of white tin of various orientations has been measured using the radio-active isotope Sn113. The ratio of the diffusion coefficients parallel and perpendicular to the tetragonal (c) axis is approximately 2 at 180 �C. and approximately 3 at 223 �C. The diffusion coefficients in both directions at various temperatures are given by the Arrhenius expressions Dc= 1.2 x 10-5e-10,1500/RT cm.2sec.-1 and Da=3.7 X 10-8e-5,900/RT cm.2sec.-l. The anisotropy is discussed in terms of the vacancy mechanism of diffusion.

Self Diffusion in Cyclohexane Single Crystals

1966 ◽  
Vol 1 (1) ◽  
pp. 97-112 ◽  
Author(s):  
G. M. Hood ◽  
J. N. Sherwood
Keyword(s):  
Single Crystals ◽  
Self Diffusion

Self-Diffusion in Nano-ZnO

2010 ◽  
Vol 307 ◽  
pp. 27-35
Author(s):  
S.S. Kanmani ◽  
K. Ramachandran
Keyword(s):  
Isotope Effect ◽  
Zno Nanoparticles ◽  
Reaction Coordinate ◽  
Vacancy Mechanism ◽  
Nano Zno ◽  
Self Diffusion ◽  
Jump Frequencies

Self-diffusion, both cationic and anionic, in ZnO nanoparticles was studied here in accord with reaction coordinate theory. The jump frequencies at various temperatures were computed. The isotope effect revealed that self-diffusion occurred mainly via a vacancy mechanism in nano ZnO; a result not previously reported in the literature.

Self-diffusion in cr2o3II. Oxygen diffusion in single crystals

1992 ◽  
Vol 66 (3) ◽  
pp. 351-360 ◽  
Author(s):  
A. C. S. Sabioni ◽  
A. M. Huntz ◽  
F. Millot ◽  
C. Monty
Keyword(s):  
Single Crystals ◽  
Oxygen Diffusion ◽  
Self Diffusion

Anisotropy of oxygen self-diffusion in YBa2Cu3O7−δ single crystals

1991 ◽  
Vol 179 (4-6) ◽  
pp. 286-290 ◽  
Author(s):  
S.I. Bredikhin ◽  
G.A. Emel'chenko ◽  
V.Sh. Shechtman ◽  
A.A. Zhokhov ◽  
S. Carter ◽  
...  
Keyword(s):  
Single Crystals ◽  
Self Diffusion

Self-Diffusion Measurements in Gold Single Crystals between 286 and 412°C

1969 ◽  
Vol 33 (2) ◽  
pp. 509-516 ◽  
Author(s):  
W. Rupp ◽  
U. Ermert ◽  
R. Sizmann
Keyword(s):  
Single Crystals ◽  
Self Diffusion
Sign in / Sign up

Export Citation Format

Share Document