Materials Literature
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High yield nuclear fusion operating in tokamak and stellarator need to heat plasma up to the required temperatures. As the confined plasma is overdensed, the electron cyclotron resonance heating (ECRH) is inefficient due to cut-off layer. A double mode conversion O-SX and finally electron Bernstein waves (EBW) O-SXB,…
The possibility of creating high-energy materials with increased ecological purity of combustion products based on a mixed oxidizer (ammonium nitrate, ammonium perchlorate), and inorganic fuel (boron, diboride or aluminum polyboride) is shown.
The expected combinational merits of polymeric materials and nickel-bis(dithiolene) complexes are successfully achieved by a ligand-exchange post-polymerization modification method.
The reactivity of metallic nanotubes toward the catalysis of water dissociation, a key step in the water gas shift reaction (WGSR), was analyzed through density functional theory (DFT) calculations. Water dissociation was studied on surfaces of nanotubes based on copper, gold and platinum, and also on platinum doped c…
Equilibrium of an elastic body from inhomogeneous material, possessing piezo properties, is considered. Deformed and electrical states of such body are described by a system of four coupled partial differential equations with variable coefficients relative to three components of the displacement vector and the scalar…
Currently in Europe there is a growing trend towards low energy and passive houses where natural materials are often used. These materials are very promising in terms of environmental protection. The use of green thermal insulation materials brings a significant reduction of energy requirements of buildings which is t…
The paper reviews literature on the structure, properties, production processes, and fields of application of materials based on the MAX phase Cr 2 AlC. It was noted that the most promising method for production of such materials was self-propagating high-temperature synthesis (SHS), with SHS metallurgy being one of i…
摘要：
Helmet is used as a safety gear to prevent the impact energy from a collision, due to a motorcycle accident, from injuring the rider’s head. Manufacturing of a light weighted helmet with a high absorption of impact energy, is much expected because it could increase the rider’s safety and mobility. Meanwhile there are…
摘要：
Carbon nanoparticles (CNPs) have been synthesized by laser ablation of polycrystalline graphite in water using a pulsed Nd:YAG laser (1064 nm) with a width of 8 ns. Structural and mesoscopic characterization of the CNPs in the supernatant by Raman spectroscopy provide evidence for the presence of mainly two ranges of…
Background: The clinical performance of a drug-eluting coronary stent largely depends on the properties of its polymeric coating. While the randomized clinical research is the “gold standard” for the effectiveness and safety evaluation of the coronary stent, the bench top testing of the stent coating may provide valua…
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This paper presents a theoretical dynamic model based on the Hampton criterion and Mayr's equation for predicting the critical values of flashover on the surface of nonuniformly polluted cap and pin porcelain insulators. The nonuniform pollution layer on the surface of the insulator, the number of disk insulator units…
Tetragonal 30-nm thick Pb(ZrxTi1−x)O3 films were grown epitaxially on (100) KTaO3 and (100) SrTiO3 single crystal substrates by pulsed metal organic chemical vapor deposition. High temperature X-ray diffraction (XRD) reciprocal space mapping showed that Pb(ZrxTi1−x)O3 thin films of different compositions have a misfit…
From the modern perspectives biocompatibility is a feature of the whole system «tissue engineered graft — recipient’s body». Adequate and predictable performance of this system is determined by all its components (recipient’s body, material, cells) to the same extent. Biomaterials for tissue engineered grafts shouldn’…
White light emitting dysprosium (Dy) doped Zirconia (ZrO2) nanostructures were prepared first time via ultrasound assisted sonochemical synthesis route using cetyltrimethylammonium bromide (CTAB) surfactant. The obtained product was well characterized. The powder X-ray diffraction (PXRD) profiles confirmed that the pr…
A hardware and software implementation of compact data acquisition system for pulsed nuclear quadrupole resonance spectrometer is proposed. The developed system is based on multi-protocol converter USB-245FIFO FT2232H, which provides data transfer speeds up to 480 Mb/s. For nuclear spin induction visualization and dat…
Aim. The purpose of this study was to evaluate the load and unload deflection and permanent deformation of round 0.016′′ and rectangular 0.016′′×0.022′′ regular and coated Ni-Ti wires. Materials and Methods. Ni-Ti archwires produced by two manufacturers were evaluated. Both regular and coated round and rectangular Ni-…
The modeling tasks of thermal effect of power impulse action on a surface of the plate of VК10 (КS) alloy were considered and solved. As modeling tasks for homogeneous equations of parabolic and hyperbolic heat conductions, a wave equation in a cylindrical solid of final sizes with boundary conditions of III kind were…