| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
Effect of Additives on Hydrogen Equilibrium Pressure and Absorption Rates in Yttrium Hydride |
| Author(s) |
Moiz Butt, Christopher Matthews, Thomas Nizolek, Sean McDeavitt, Erik Luther, Nathan E. Peterson |
| On-Site Speaker (Planned) |
Nathan E. Peterson |
| Abstract Scope |
Metal hydrides are an attractive choice for use as moderators for nuclear reactors due to their high hydrogen density and ability to retain hydrogen to high temperatures. Yttrium hydride is being considered as a candidate moderator material because it has the highest known thermal stability of the metal hydrides. We have investigated the thermodynamics and kinetics of hydrogen absorption of this material to better understand the behavior and how it would perform in its intended application. This study paid particular attention to impurities and alloying additions to yttrium and their effects on the thermodynamics and kinetics. A sieverts apparatus was used to measure and construct Pressure Composition Temperature diagrams. The data was also analyzed to elucidate the absorption kinetics of yttrium hydride and identify the rate limiting step for hydrogen interaction. |