Abstract
The kinetics and mechanism of the hydrogen-induced disproportionation of ZrCo was studied experimentally. In general, the time dependence of the disproportionation has a sigmoidal shape. The disproportionation rate increased with increasing initial hydrogen pressure and showed a 3/2-power dependence on the pressure. As for the temperature dependence, the rate increased with temperature only up to 815 K and then decreased at higher temperatures. Namely, a volcano-type pattern was observed in the Arrhenius plot of the rate constant. In addition, a fairly large isotope effect was observed for the rate of disproportionation between hydrogen and deuterium. These results were explained well by a nucleation and nuclei growth model, in which hydrogen solubility in the ZrCo phase was assumed to play an important role.
| Original language | English |
|---|---|
| Pages (from-to) | 831-838 |
| Number of pages | 8 |
| Journal | Fusion Engineering and Design |
| Volume | 49-50 |
| DOIs | |
| State | Published - 2000/11 |
| Event | 5th International Symposium on Fusion Nuclear Technology - Rome, Italy Duration: 2000/09/19 → 2000/09/24 |
ASJC Scopus subject areas
- Civil and Structural Engineering
- Nuclear Energy and Engineering
- General Materials Science
- Mechanical Engineering