The model used to evaluate the single interstitial migration energy from property changes due to interstitials is extended to account for vacancy contributions. The annealing function obtained can be used to determine the relative contributions of the defects and is sufficiently sensitive to disting
Anomalous stored energy and c-axis changes in alternately irradiated and annealed graphite
β Scribed by Donald G Schweitzer; Robert M Singer
- Publisher
- Elsevier Science
- Year
- 1964
- Tongue
- English
- Weight
- 487 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
β¦ Synopsis
Stored energy releases in graphites exhibiting normal and enhanced dimensional changes indicate that the change in rate of dimensional expansion after large neutron irradiations is due to a change in apparent defect volume and is not due to a change in the rate of accumulation of defects. Reverse stored energy annealing experiments are correlated with the reverse c-axis annealing experiments.
The assumption that interstitials anneal to sinks rather than to vacancies can be used to explain these data. The nature of the annealing reactions producing stored energy releases is discussed.
π SIMILAR VOLUMES
## K.) and G. Jouquet (Centre d'&des Nuclkaires de Saclay, France). The shear modulus of hot-worked pyrolytic graphite has been measured by the torsional resonant frequency of compound aluminium/graphite specimens. Material of density 2.23 g/cm\* gave a C,, value of I.3 f 0.3 x loo dyn/cml. Neutro
Two previously proposed quantitative models for the radiation-induced dimensional changes in polycrystalline graphite treated the material as containing a single crystalline phase. One model was based on thermodynamic relationships and the other was derived by averaging the contributions of the indi