Investigation of Hydrogen Sorption-Desorption Processes and Hydrides Formation and Dissolution in Zirconium by Using Sievert Apparatus and Short-Wave Diffraction of Synchrotron Radiation

Abstract:

Hydrogen sorption-desorption processes by zirconium alloy Zr-1Nb was investigated in this article. Sievert apparatus was used for investigation of hydrogen interaction with material. It was shown that hydrogenation at gas atmosphere at 350, 450 and 550 °C temperatures leads to the δ-hydride formation in all material volume. Hydrogen sorption rates were calculated on the linear parts of sorption curves and equal to 0.5·10^-4 wt%/s at 350 °C, 9.5·10^-4 wt%/s at 450 °C and 23.1·10^-4 wt%/s at 550 °C. Short-wave diffraction of synchrotron radiation was used for investigation of hydrides dissociation during heating. Hydrides dissociation formed after hydrogenation at gas atmosphere occurs at temperature 522-540 °C. Further temperature increasing leads to β-phase appearance which indicates α to β phase transition at zirconium.

• Periodical: Key Engineering Materials (Volume 683)
• Pages: 415-418
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.683.415
• Online since: February 2016
• Authors: Viktor N. Kudiiarov*, M. Syrtanov, Maria N. Babihina, Dmitriy V. Gvozdyakov
• Keywords: Hydrides, Hydrogen, Short-Wave Diffraction, Sievert Apparatus, Synchrotron Radiation, Zirconium

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