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Hydrogen desorption behavior of the hydrides of Zr[sbnd]Y alloys under Ar and CO2 atmosphere.
- Source :
-
Journal of Alloys & Compounds . Feb2017, Vol. 693, p103-109. 7p. - Publication Year :
- 2017
-
Abstract
- The crack-free bulk hydrides of Zr Y alloys have been prepared and characterized by X-ray diffraction, optical microscopy and electron probe microanalysis to study the phase structure, microstructure and composition distribution, respectively. It was found that the as-received hydrides were composed of zirconium hydrides and yttrium hydrides mixtures. We performed thermogravimetry and simultaneous thermal desorption spectroscopy (TG/TDS) under Ar and CO 2 atmosphere to study the effect of yttrium and surface oxide layer on hydrogen desorption from zirconium hydride. The results showed that zirconium hydrides containing higher Y content tend to have higher hydrogen desorption temperatures and higher hydrogen content, suggesting that hydrogen could be retained in the hydride matrix by alloying with yttrium. X-ray diffraction indicated that an oxide layer was formed on the surface of the metal hydrides under CO 2 atmosphere, and yttrium could stabilize t-ZrO 2 phase in the oxide layer, thus inhibiting hydrogen desorption from the metal hydrides at the reactor working temperature. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDRIDES
*DESORPTION
*ZIRCONIUM alloys
*HYDROGEN
*ATMOSPHERIC carbon dioxide
*ARGON
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 693
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 119775502
- Full Text :
- https://doi.org/10.1016/j.jallcom.2016.09.063