Publications by authors named "Mikhail Koloberdin"
Article Synopsis
- This study investigated how irradiation from krypton and helium ions affects the structure and composition of high-entropy alloys (HEAs) at room temperature, specifically CoCrFeNi and CoCrFeMnNi.
- Findings showed that while elemental distribution remained stable, blisters formed on nickel surfaces due to the irradiation process, with large ones averaging 3.8 μm in diameter.
- The research noted significant changes in lattice parameters, stress levels (compressive and tensile), and dislocation densities in the HEAs post-irradiation, indicating differences in material responses between the two alloys.
Article Synopsis
- * The study examined changes in their structure and surface morphology after irradiation, revealing the development of a porous surface with microchannels, and noted that CoCrFeMnNi had smaller blister sizes compared to CoCrFeNi.
- * Results showed that while elemental compositions remained stable under high temperatures, CoCrFeMnNi demonstrated better radiation resistance by forming compressive macrostresses and a higher dislocation density compared to CoCrFeNi.
The results of a tungsten-niobium alloy synthesis by the impact of pulsed compression plasma flows are presented. Tungsten plates with a 2 μm thin niobium coating were treated with dense compression plasma flows generated by a quasi-stationary plasma accelerator. The plasma flow with an absorbed energy density of 35-70 J/cm and pulse duration of 100 μs melted the niobium coating and a part of the tungsten substrate, which caused liquid-phase mixing and WNb alloy synthesis.
View Article and Find Full Text PDFHigh-entropy alloys (HEAs) have prospects for use as nuclear structural materials. Helium irradiation can form bubbles deteriorating the structure of structural materials. The structure and composition of NiCoFeCr and NiCoFeCrMn HEAs formed by arc melting and irradiated with low-energy 40 keV He ions and a fluence of 2 × 10 cm have been studied.
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