Abstract
An attempt is made to interpret the temperature independent factor ${D}_{0}$ of the previously determined diffusion coefficients of interstitial solute atoms in metals. The primary uncertainty in the value of ${D}_{0}$ given by the standard reaction rate theory resides in an entropy factor $\mathrm{exp}(\frac{\ensuremath{\Delta}S}{R})$. When cognizance is taken of an additional strain in the lattice surrounding a solute atom as it passes over a potential energy divide, and of the increase in entropy associated with an increase in lattice strain energy, one can estimate a "theoretical" range within which these entropy factors should lie. All past observations except for C and N in $\ensuremath{\alpha}\ensuremath{-}\mathrm{Fe}$ are consistent with this theoretical range. The ${D}_{0}'\mathrm{s}$ for these two systems were, therefore, redetermined by more precise measurements, and are found to be an order of magnitude higher than the original values. The associated entropy factors are consistent with the theoretical range.
Keywords
PhysicsThermodynamicsEntropy (arrow of time)Lattice (music)Atom (system on chip)Atomic physicsCondensed matter physics
Affiliated Institutions
Related Publications
Electronic structure of the GaAs:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Mn</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>scenter
The excitation spectrum of the 0.11-eV Mn acceptor in GaAs has been thoroughly investigated by uniaxial stress and Zeeman fourier transform infrared spectroscopy. The results gi...
Energy Loss and Effective Charge of Heavy Ions in Aluminum
Heavy-ion beams of fixed initial energy ($\frac{{E}^{0}}{m}\ensuremath{\approx}10$ Mev/amu) are passed through aluminum absorbers of known thickness, and the emergent ions are a...
Repulsive Interaction Potentials between Rare-Gas Atoms. Heteronuclear Two-Center Systems
A theoretical expression, previously applied only to homonuclear pairs of rare-gas atoms, has been used to calculate the interaction energies $U(R)$ for the corresponding hetero...
Dynamical simulations of radiation damage and defect mobility in MgO
Collision cascades are investigated in MgO at energies ranging from $400\phantom{\rule{0.3em}{0ex}}\mathrm{eV}\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}5\ph...
Predicted band-gap pressure coefficients of all diamond and zinc-blende semiconductors: Chemical trends
We have studied systematically the chemical trends of the band-gap pressure coefficients of all group IV, III-V, and II-VI semiconductors using first-principles band-structure m...
Publication Info
- Year
- 1949
- Type
- article
- Volume
- 76
- Issue
- 8
- Pages
- 1169-1175
- Citations
- 791
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
791
OpenAlex
Cite This
C. A. Wert,
Clarence Zener
(1949).
Interstitial Atomic Diffusion Coefficients.
Physical Review
, 76
(8)
, 1169-1175.
https://doi.org/10.1103/physrev.76.1169
Identifiers
- DOI
- 10.1103/physrev.76.1169