The metal hydride used as hydrogen storage material has come into public notice. It is very important to understand the crystal structure and the permutation of hydrogen and the metal crystal structure of hydride for developing industrial hydrogen storage material.
The tetrahedral formation of the atom intervals of titanium/zirconium alloys benefits the absorbing of hydrogen atoms. Especially under high temperature, the titanium/zirconium alloys have high affinity on hydrogen, and hydrogen atoms help to absorb within the titanium/zirconium alloys can spread and enter materials fast on the surface, this way will get uniform saturation solid solution. Therefore, we use hydrogen gas in the high-temperature gaseous phase to melt the titanium/zirconium alloys and observe the crystal structure and morphology of hydride precipitates with transmission electron microscopy.
The research contents are as follows:
(1) In Ti-H system, ageing of quenched specimens which contained the hydrides are found to have a face-centered tetragonal structure (£^-titanium hydride). Ageing of furnace-cooled specimens which contained the hydrides are found to have a face-centered cubic structure (£_-titanium hydride).
(2) In Zr-H system, ageing of quenched specimens which contained the hydrides are found to have a face-centered tetragonal structure (£^-zirconium hydride). Ageing of furnace-cooled specimens which contained the grain-boundary hydrides are found to have a face-centered cubic structure (£_-zirconium hydride).
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0722108-144619 |
| Date | 22 July 2008 |
| Creators | Ju, Min-syong |
| Contributors | Gan, Der shin, Hsieh, Ker-Chang, Shen, Pouyan |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0722108-144619 |
| Rights | not_available, Copyright information available at source archive |
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