1. Helium retention and surface morphology of oxidized vanadium alloy
- Author
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Tamaki Shibayama, Tomoaki Hino, D. Oku, Takeo Muroga, Yuji Yamauchi, Yuji Nobuta, and Takuya Nagasaka
- Subjects
inorganic chemicals ,blister formation ,Nuclear and High Energy Physics ,Materials science ,Morphology (linguistics) ,Helium retention ,genetic structures ,Thermal desorption spectroscopy ,oxidation ,Alloy ,Analytical chemistry ,Thermal desorption ,chemistry.chemical_element ,Vanadium ,engineering.material ,Desorption ,General Materials Science ,Irradiation ,Helium ,thermal desorption ,vanadium alloy ,respiratory system ,respiratory tract diseases ,Nuclear Energy and Engineering ,chemistry ,engineering ,circulatory and respiratory physiology - Abstract
The effects of the surface oxidation on the helium desorption and retention behaviors of vanadium alloy were investigated. V–4Cr–4Ti alloy, which was thermally oxidized at 873 K for 15 min with 0.05 Pa, was irradiated by helium ions with energy of 5 keV at room temperature. Then, the helium desorption and retention behaviors were evaluated using a technique of thermal desorption spectroscopy. The changes in surface structures by the irradiation were also evaluated. Helium desorption behavior in low temperature region were significantly changed by the oxidation. Helium desorption around 700 K became large for the oxidized sample. The amount of retained helium and the blister size in the oxidized sample were smaller than of those in the non-oxidized one. These results indicate that the surface oxidation significantly affects the helium retention and desorption behaviors of the vanadium alloy.
- Published
- 2011