Search academic texts

Information × Registration Number 0225U000416, (0122U002139) , R & D reports Title Development of new nanostructured composites based on Ni-Co, Ni-Co-Al and Ti-Al-C systems with improved physicochemical and mechanical characteristics popup.stage_title Розроблення нових наноструктурованих композитів на основі систем Ni-Co, Ni-Co-Al та Ti-Al-C з підвищеними фізико-хімічними і механічними характеристиками Head Zavalii Ihor Yu., Доктор хімічних наук Registration Date 11-01-2025 Organization Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine popup.description1 Objective: To synthesize and investigate the hydrogen adsorption and catalytic properties of nanopowders based on transition metals and alloys of Ni-Co and Ni-Co-Al systems depending on their structural state. Taking into account the established interdependencies to develop effective electrode and hydrogen-generating materials with improved operating parameters. popup.description2  As a result of the SRW, all the tasks were completed, and the following fundamental and applied results were obtained: - The methods of synthesis of polymetallic nanopowders based on Ni and Co by leaching and chemical reduction methods were optimized. The synthesized materials were characterized by X-ray diffraction, low-angle X-ray scattering, SEM and BET methods. - The presence of electrochemical sorption-desorption of hydrogen by Ni- and Co-based nanomaterials was confirmed. The positive effect of Ni/Co/Fe nano-additives on the characteristics of MH-composite electrodes was shown. - The presence of hydrogen sorption from the gas phase by synthesized materials under normal conditions (room temperature, H2 pressure – 1…10 atm) was shown for the first time, while the degree of disorder in the series crystalline nanocrystalline–amorphous state correlates with the tendency to hydrogenation. - The synthesized polymetal nanosystems based on d-elements (Fe, Co, Ni) have been tested as catalysts for hydrogen generation via hydrolysis of sodium borohydride and composites based on magnesium hydride. A nanostructured bicomponent catalyst for the “hydrolysis block – PC” device has been developed. - A nanostructured coating on titanium alloy OT4-1 was obtained by magnetron sputtering of the MAX phase Ti2AlC and chromium simultaneously using preliminary modification of the substrate surface with chromium ions and deposition of a chromium sublayer. It was found that this coating possesses a unique combination of high heat resistance (Dm/S = 0.05 mg/cm2) and surface electrical conductivity (s = 1.02.106 Sm/m) during long-term (1000 h) exposure at 600°C in air. - It was established that the vacuum-arc nanostructured coating based on the MAX phase Ti2AlC allows to increase the wear resistance of steel 15Х16К5Н2МВФАБ-Ш at 500°C by 2 times and the resistance to fretting fatigue at 20°C by 4.8 times. Parts of aircraft engines processed according to the proposed technology were transf Product Description popup.authors Bazyliak Liliia I. Berezovets Vasyl V Borukh Ihor V. Verbovytskyi Yurii V. Vlad Khrystyna I. Harashсhenko Valerii V. Dubov Yurii H. Zavalii Ihor Yu. Zasadnyi Taras M. Kysylevskyi Lev N. Kytsia Andrii R. Kononiuk Oleksandr P. Kosarchyn Yurii V. Liutyi Pavlo Ya. Marchuk Iryna Ye. Ostash Orest P. Perehinets Volodymyr M. Podhurska Viktoriia Ya. Tepla Nina M Chepilʹ Roman V. Shapovalov Heorhii O. Shved Mariia M. popup.nrat_date 2025-01-11 Close