Morphology study on the depleted uranium as hydriding/dehydriding cycles
| Autor: | Yun Hee Oh, Min Ho Chang, Hyun-Goo Kang, Dongyou Chung, Yoon Myung Woo, Sei-Hun Yun, Kweon Ho Kang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Hydrogen Scanning electron microscope Mechanical Engineering Metallurgy chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 010305 fluids & plasmas law.invention Nuclear Energy and Engineering Glovebox Optical microscope chemistry law Getter Agglomerate 0103 physical sciences Particle General Materials Science 0210 nano-technology Porosity Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. :146-151 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.03.039 |
| Popis: | Depleted Uranium (DU) is one of the strongest candidates as a getter material of hydrogen isotopes in the nuclear fusion reactor. In this work, small DU lump specimen with 99.8% purity was prepared for observation of morphology variation as hydriding/dehydriding cycles. Hydriding/dehydriding of DU was carried out more than 10 cycles for powder preparation. The pulverized DU specimen was safely handled in the glove box under Argon gas condition to minimize contact with oxygen and humidity. The morphology change according to hydriding/dehydriding cycles was observed by visual cell reactor, optical microscope and scanning electron microscope. The first hydriding of the small DU sample has progressed slowly with surface enlargement and volume expansion as time passes. After third hydriding/dehydriding cycles, most of DU was pulverized. The powder fineness of DU developed as hydriding/dehydriding cycle progresses. But the agglomerates of fine DU particles were observed. It was confirmed that the DU particles exist as porous agglomerates. And the particle agglomerate shows poor fluidity and even has the cohesive force. |
| Databáze: | OpenAIRE |
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