High-temperature corrosion testing of titanium beryllides in the presence of water vapor and oxygen
Kulsartov T. Samarkhanov K. Bochkov V. Kenzhin Y. Ponkratov Y. Kenzhina I. Zaurbekova Z. Sapatayev Y. Askerbekov S. Yelishenkov A. Udartsev S.
November 2024Elsevier B.V.
Journal of Nuclear Materials
2024#600
Beryllium-based intermetallics are promising materials for the blankets of future fusion reactors and have potential applications in other areas of the nuclear industry, such as fission reactor reflectors and space technology. Understanding the high-temperature corrosion behavior of these materials in a noble gas medium containing chemically active impurities is essential for evaluating their suitability and guiding their application. This study investigates the high-temperature corrosion of titanium beryllide Be12Ti in the form of plate and grinded samples, produced by JSC “Ulba Metallurgical Plant” (Ust-Kamenogorsk, Kazakhstan). The corrosion tests were conducted under non-isothermal vapor-gas mixture (Ar + D2O or Ar + H2O flowing atmospheres) purging conditions using thermogravimetric (TG) analysis, differential scanning calorimetry (DSC), and mass-spectrometry of the gas phase. As a result of the corrosion tests, new experimental data on thermal effects have been obtained, describing the corrosion processes of Be12Ti samples across a wide range of temperatures and various heating rates in the presence of water vapor in the purge gas. The dependencies of sample mass change under heating conditions have been determined, and the characterization results of the samples before and after high-temperature corrosion tests are presented. Corrosion of titanium beryllides, both for Be12Ti plate and grinded samples, follows similar mechanisms. At around 500 °C, the mass of the samples begins to increase, and hydrogen isotopes are released. The test results indicate that corrosion of titanium beryllides with varying surface inhomogeneities proceeds similarly within the temperature range of 500–900 °C, showing a linear dependence on temperature. The results revealed significant insights into the oxidation mechanisms and the formation of corrosion products, which are crucial for optimizing the materials performance in fusion reactor environments.
DEMO breeder blanket , High-temperature corrosion tests , Hydrogen isotopes , Neutron multiplier , Titanium beryllides Be12Ti , Water vapor
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Kazakh-British Technical University, Almaty, Kazakhstan
Institute of Atomic Energy Branch of NNC RK, Kurchatov, Kazakhstan
Satbayev University, Almaty, Kazakhstan
JSC “Ulba Metallurgical Plant”, Ust’-Kamenogorsk, Kazakhstan
Institute of Experimental and Theoretical Physics, al-Farabi Kazakh National University, Almaty, Kazakhstan
Kazakh-British Technical University
Institute of Atomic Energy Branch of NNC RK
Satbayev University
JSC “Ulba Metallurgical Plant”
Institute of Experimental and Theoretical Physics
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