Materials Literature
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Acoustic spectroscopy is a valuable tool, when the degrees of freedom of a material couple to strain. Since this is the case for molecular glass-forming liquids the dynamic mechanical response is a quantity of primary interest here. Dynamic mechanical analysis measurements (0.1–100 Hz) have been performed for salol, t…
The surface functionalisation of gold nanoparticles (GNPs) with luminescent platinum complexes has been investigated, utilising α-lipoic acid derivatives for GNP stabilisation. Model complexes have been studied to mimic the chemisorption chemistry required to afford GNPs protected by an α-lipoic acid-based ligand shel…
Microstructures and mechanical properties of as cast AZ31 with Ge addition (0·4, 0·8 and 1·6 wt-%) were investigated. The results show that the grain sizes of AZ31 with Ge addition were reduced by Ge element. The Mg2Ge precipitates distributed at grain boundaries and presented an irregular shape owning to the effect o…
The objectives of the steel manufacturers are to improve their productivity and to optimize their process parameters to maximum efficiency and quality. In steel industry, the one or the more client motors are often arranged to follow the velocity of the master motor. The speed difference between these motors will affe…
A possibility of creation of the swelling type fire-retardant compositions of paints and varnishes based on intercalated graphite dispersed in the polymer matrix in the amount of 5.0–15.0 mass percent was investigated and proved. The expediency of use of the rough aqueous dispersions of polymers obtained with the use…
Ultra-fine-grained (UFG) Al-1050 processed by equal channel angular pressing and UFG Al–Mg–Cu–Mn processed by high-pressure torsion (HPT) were embossed at both room temperature and 300 °C, with the aim of producing micro-channels. The behaviour of Al alloys during the embossing process was analysed using finite elemen…
First-principle calculations of the geometry and electronic structure of lattice defects (substituents, vacancies, and binary complexes) in perovskites are considered. A supercell method and modifications of a cluster method for simulating point lattice defects in insulators are discussed. Experimental data on dielect…
Thin polycrystalline diamond films were deposited on prepared (100) Si substrate by hot filament chemical vapor deposition using a mixture of hydrogen, propane-butane and argon. During investigations the gas flow of argon was varied from 100 sccm to 400 sccm. Scanning electron microscopy analysis revealed that the add…
A simple model is suggested for deep penetration resistance of rigid, axially-symmetric, nose-pointed projectiles penetrating ductile metal targets. Model is based on power balance between the power supplied by the projectile during steady-state penetration and elastoplastic power needed for expanding penetration hole…
A method for analyzing the luminescence spectra of semiconductors is suggested. The method is based on differentiation of the spectra. The potentialities of the method are demonstrated for luminescence in the region of the fundamental absorption edge of Si and SiGe alloy single crystals. The method is superior in accu…
Abstract The molten reaction of 2‐naphthol, 2‐hydroxybenzaldehyde and tetrahydropyrrole at about 120°C yields 1‐[(2‐hydroxyphenyl)(pyrrolidin‐1‐yl)‐methyl]naphthalen‐2‐ol, whose co‐crystal ( 1 ) with 2‐naphthol was characterized by X‐ray single crystal diffraction, XRPD and IR. Compound 1 crystallizes in a noncentrosy…
The crystallization of epitaxial layers from aqueous solutions in the K 2 Co(SO 4 ) 2 · 6H 2 O-K 2 Ni(SO 4 ) 2 · 6H 2 O and (NH 4 ) 2 Co(SO 4 ) 2 · 6H 2 O-(NH 4 ) 2 Ni(SO 4 ) 2 · 6H 2 O systems has been studied. A mechanism is proposed to explain the experimentally observed phenomena, taking into account the effect th…
The influence of the oxygen partial pressure P O 2 in the growth atmosphere on the coefficient of chromium distribution between the crystal and the melt of forsterite, the Cr3+ and Cr4+ ion contents in crystals, and the concentration of color centers induced by irradiation has been investigated. It has been establishe…
Polymeric products play an important role in almost every aspect of our lives and they can be found in a wide variety of products starting from everyday products up to high tech products in the automotive, electronics, medical and other sectors. The possibility to fabricate complex shapes in various sizes provides des…
In this work, PLGA nanoparticles were prepared by an emulsification-diffusion technique. The main objective was to optimize the preparation of formulations by evaluating the influence of the technological parameters on the physicochemical properties of PLGA nanoparticles. The effects of variations in polymer and emuls…
Magnesium (Mg) which has the lowest negative standard electrode potential among industrial metals, results in the easy corrosion phenomenon in contact with other metals due to the formation of a galvanic cell at the interface. The traditional methods to evaluate corrosion resistance such as saltwater immersion test, s…
Carbon nanotubes (CNTs) are promising additives for polymer composites due to their excellent special mechanical, electrical, and thermal properties. Polypropylene/multi walled carbon nanotube (PP/MWCNT) composites were produced in single and double screw extruders. The composites contained 0.5, 2, 3 and 5 wt% multi w…
Abstract Single phase Bi 2 FeMnO 6 films on (100) SrTiO 3 substrate were fabricated using a pulsed laser deposition method through optimization of the preparation conditions. The magnetic moment is 0.30 μ B at 5 K in the magnetic field of 1 T, indicating that B site cations of Fe and Mn are disordered in the sample. T…
It is experimentally confirmed that transition a topokinetic stage plasma of chemical etching of silicon in diffusion occurs around a maximum of dependence of speed of etching from the oxygen maintenance in plasma CF2Cl2/O2. The load effect is studied. Results of article well correlate with the data received in the re…
Phase diagrams of oligomer solutions have been constructed within the mean-field approximation. The free energy includes the configuration entropy and the formation free energy of both solvation shells of the oligomers and bonds between them, where this formation free energy depends upon the oligomer-solvent and solve…