A5003037303- Additive Manufacturing and 3D Printing Technologies
- Material Properties and Applications
- Carbon Nanotubes in Composites
- Engineering Technology and Methodologies
- Polymer Science and Applications
- Engineering and Environmental Studies
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Bone Tissue Engineering Materials
- Injection Molding Process and Properties
- Material Properties and Failure Mechanisms
- Dielectric materials and actuators
- Innovative Energy Harvesting Technologies
- Polymer crystallization and properties
- Electrospun Nanofibers in Biomedical Applications
- Supercapacitor Materials and Fabrication
- Mechanical Behavior of Composites
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Environmental and Industrial Safety
- Tribology and Wear Analysis
- Education and Social Development in Ukraine
- Fiber-reinforced polymer composites
- Nanopore and Nanochannel Transport Studies
University of Minnesota
2023-2024
E.O. Paton Electric Welding Institute
2017-2024
National Academy of Sciences of Ukraine
2022-2024
One of the most important directions in development additive manufacturing or three-dimensional (3D) printing technologies is creation functional materials, which allow not only prototyping but also products with properties. In this paper, poly-lactide acid (PLA) /carbon black (CB) composites segregated (ordered) structure have been created. Computer simulation based on Mamunya geometrical model showed that CB content within φ = 2.5–5 vol.% polylactide matrix leads to formation a continuous...
Electrothermal processes were studied in pyroresistive composites based on high-density polyethylene (HDPE) containing 8 vol.% carbon black (CB), fibers (CF), and their mixture 4 CB + CF. It is shown that the kinetic heating curves of are well described by an exponential dependence with a certain rate constant k for each type composite. After short time, equilibrium temperature Te reached sample. When applied voltage exceeds value, value decreases due to presence positive coefficient...
Abstract Conductive polymer composites have been developed based on high‐density polyethylene filled with carbon black (HDPE‐CB), capable of generating heat when an electric voltage is applied. For each value, the composite reached a constant value equilibrium temperature, which obeyed quadratic dependence and linear power. The possibility using such as heating elements (HE) for electrofusion welding adherents was evaluated in two modes, ''hard'', high applied short time, ''soft'', stepwise...
Abstract This work describes impact of concentration BiFeO 3 submicrometric particles on piezoelectric performance and structural characteristics 0–3 polymer composites with a polystyrene matrix. Bismuth ferrite are fabricated using reverse co‐precipitation method, followed by ultrasonic dispersion in solvent to break up agglomerates formed during sintering, resulting size ≈200 nm. It is found that concentrations higher than 10 wt% lead disturbance natural organization polystyrene. The...
Carbon nanotubes (CNTs) were successfully synthesized using industrial waste gases by chemical vapor deposition inside vertically oriented nanopores of insulating membranes. Importantly, the products from Fischer–Tropsch synthesis used as carbon source rather than typical purified sources, and this recycling is important for sustainability our environment. Specifically in work, vertical CNT arrays achieved nickel (Ni) magnetic nanowires (MNWs) catalysts that prepared template electrochemical...
The impact of thermodeformational cycle welding on structural-phase transformations in the HAZ metal armour steel 30Kh2NMF type with different carbon content (0.25; 0.29 and 0.31 %) was studied.At next stage, structural changes model samples-simulators % at cooling rates (3.8; 12.5 21 °C/s) their fracture mode after bend testing were studied.As a result performed studies, it established that structure ensuring optimum level strength toughness, forms when low are used (below 3.8 °C/s).13...
В роботі проведено аналіз сучасного стану 3D технологій полімерних матеріалів, який базується на публікаціях, представлених як у відкритих джерелах
Until recent time no scientific researches on weldability of new heat-resistant thermoplastics, known as polyarylenes, have been carried out in Ukraine. Present work concerns with investigations technological peculiarities the welding thermoplastic polymers based two representatives polyarylene class, namely amorphous polyetherimide (PEI), and semi-crystalline polyetheretherketone (PEEK), which are among most prospective progressive construction materials. The results obtained shows highest...
The effect of electrodynamic action on the life welded joints AMg6 aluminum alloy under cyclic loading was investigated.It found that treatment specimens butt results in reducing level residual tensile welding stresses, which is followed by their transition to compression.It shown as a result double-sided single-channel surface alloy, three times increased compared initial one.Additional fusion line five increases non-treated metal.In comparative evaluation single-and two-channel specimens,...