Vacancy-Formation Energy and Entropy in Magnesium Single Crystals
- 15 October 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 2 (8), 3088-3098
- https://doi.org/10.1103/physrevb.2.3088
Abstract
Macroscopic thermal dilatation coefficients as well as those of the lattice have been precisely measured along principal crystallographic directions of magnesium single crystals in the temperature range between room temperature and 650°C. The vacancy concentration was thus obtained as a function of temperature and it reached the value of 72× in the neighborhood of the melting point. An appreciable anisotropy in the atom rearrangement appears during the defect-formation process, which seems to correspond to a preferential climb of edge dislocations in the prismatic planes. From the behavior of the excess in macroscopic dilatation as a function of temperature, the formation energy is found to be 0.58 eV per vacancy, while the formation entropy is practically zero.
Keywords
This publication has 15 references indexed in Scilit:
- Thermal-Expansion Measurements of Vacancy Formation Parameters in Zinc Single CrystalsPhysical Review B, 1969
- Configurations de dislocations dans un cristal d'aluminium en fonction de la températureJournal de Physique, 1969
- Equilibrium vacancy concentration in pure Pb and dilute Pb-Tl and Pb-In alloysPhilosophical Magazine, 1967
- Equilibrium Defect Concentration in Crystalline SodiumPhysical Review B, 1966
- LES DISLOCATIONS DANS LE BÉRYLLIUM MACLAGE ET DÉFORMATION PAR MONTÉELe Journal de Physique Colloques, 1966
- The annealing of faulted loops in magnesium and zincProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1966
- Measurement of Equilibrium Concentrations of Vacancies in CopperPhysical Review B, 1963
- Measurement of Equilibrium Concentrations of Lattice Vacancies in GoldPhysical Review B, 1962
- Measurement of the Equilibrium Concentration of Lattice Vacancies in Silver near the Melting PointPhysical Review B, 1960
- Measurements of Equilibrium Vacancy Concentrations in AluminumPhysical Review B, 1960