Behavior of Oxygen in Fusion Candidate Vanadium Alloys during Oxidation and Annealing

Abstract:

A V-4Cr-4Ti alloy and pure V were oxidized in flowing argon for 0.5-8h and subsequently annealed in vacuum for 16h at 973K. The oxygen of 1000-9000ppm was introduced into the V-alloys with little nitrogen, where oxygen was concentrated in region near the surface. By the annealing, oxygen was homogeneously diffused into depth of 150µm. The diffusion depth of oxygen in V-4Cr-4Ti is much smaller than that of pure V, because of Ti-O precipitates formed as oxygen trap. The study indicated that it is feasible to control oxygen level and distribute in the surface region of the vanadium alloys.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 1445-1448
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.1445
• Online since: January 2005
• Authors: Zhenyu Yao, Akihiro Suzuki, Takuya Nagasaka, Takeo Muroga
• Keywords: Annealing, Fusion Blanket, Oxidation, Vanadium Alloy

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