Analysis of Self-Diffusion and Quenching Studies in Aluminum and Gold
- 15 February 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 166 (3), 621-625
- https://doi.org/10.1103/physrev.166.621
Abstract
The analysis of available experimental data for self-diffusion in Al and Au shows that the apparent activation energy increases with increasing temperature. It is shown that this behavior cannot be due only to a divacancy contribution to the high-temperature diffusivity, since this contribution would have to be too large. An explanation which is consistent with the results of quenching studies can be formulated in terms of a temperature dependence of the motion enthalpy of single vacancies. In Al, is found to increase from 0.46 to 0.72 eV between 225 and 650°C, and in Au from 0.71 to 0.83 eV between room temperature and 1025°C. The conclusions of this investigation are especially important for the identification of quenched-in defects and for the study of thermally activated processes in general.
Keywords
This publication has 24 references indexed in Scilit:
- NMR MEASUREMENT OF THE DIFFUSION COEFFICIENT OF PURE ALUMINUMApplied Physics Letters, 1967
- Self-diffusion in goldJournal of Physics and Chemistry of Solids, 1965
- Nuclear magnetic resonance studies of diffusion of Al27 in aluminum and aluminum alloysActa Metallurgica, 1965
- Diffusion of iron, cobalt and nickel in goldActa Metallurgica, 1963
- Diffusion of Al26 and Mn54 in AluminumJournal of Applied Physics, 1962
- Measurements of Equilibrium Vacancy Concentrations in AluminumPhysical Review B, 1960
- Measurements of the High-Temperature Electrical Resistance of Aluminum: Resistivity of Lattice VacanciesPhysical Review B, 1960
- Use of Thermal Expansion Measurements to Detect Lattice Vacancies near the Melting Point of Pure Lead and AluminumPhysical Review B, 1958
- Self-Diffusion in GoldProceedings of the Physical Society. Section B, 1957
- Self-Diffusion of GoldPhysical Review B, 1956