Materials Literature
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Abstract In the present study, the limiting values are determined of the criteria quantities of optimal forming of the most convenient bent supporting structure for the case of static loads in the range of the Hooke’s law applicability. As the criterion of the most convenient constructional element, the following were…
Complexes of the metal : ligand = 1 : 1 composition have been obtained via reactions of tetraphenylporphyrazine with erbium and ytterbium acetates. Based on them, heteroleptic complexes of the 1 : 2 composition containing phthalocyanine and tetraphenylporphyrazine ligands have been prepared.
The dry sliding friction test of normalized T10 steel against hardened quenched and tempered 20CrMnTi steel under normal load of 60 N and sliding speed of 0.29m/s was carried out on a pin-on-disc tribo-tester. The microstructures in the worn surface layer of T10 steel pin and 20CrMnTi steel disc were analyzed by OM, S…
SnO2 ceramics were synthesized by SPS. Phase compositions and microstructures are examined by XRD, SEM and EDS, respectively. Sb2O3 used in our research were beneficial to lower the sintering temperature and promote the densification of SnO2 ceramics. The SEM results show a homogeneous microstructure is approached con…
In this numerical study, measurements of the contact forces inside a periodic two-dimensional sheared system of soft frictional particles are reported. The distribution of normalized normal forces exhibits a gradual broadening with the increase of the pure shear deformation γ , leading to a slower decay for large forc…
The paper analyzes features of the techniques for calculation of thermomechanically loaded reformer tube components in EP-300 pyrolysis furnaces under high-temperature creep. The patterns of the relationship between the tube wall temperature and coking during operation are analyzed. On the basis of the calculated temp…
Silver nanoparticle lines are fabricated on flexible and highly heat-resistant nanopaper substrates made from densely packed 15 to 60 nm cellulose nanofibers. The conductivity of the lines is enhanced to the level of bulk silver.
To investigate the deformation properties of TiC-(5-20) mol% Mo solid solution single crystals at high temperature by compression testing, single crystals of various compositions were grown by the radio frequency floating zone technique and were deformed by compression at temperature from 1250K to 2270K at strain rate…
A setup for recording optically detected electron paramagnetic resonance (OD EPR) spectra of radical ions involved in geminate pair recombination is described. Unlike the previously developed setups of this kind, vacuum ultraviolet (VUV) radiation is used to generate radical ion pairs. The setup allows registration of…
An eigenanalysis of an array of periodically located wires covered with axially magnetized ferrites is presented. The interest in this structure stems from our previous study which revealed that such a wire may support backward surface and possibly backward leaky waves. These possibilities are examined herein by using…
Three typical solution schemes of adjoint problems of heat transfer, phase transformations and chemical reaction at the forest fuel material surface were analyzed in this work. Characteristic times of thermal decomposition reaction suppression of forest fuel materials (needles of pine and fir-tree, leaves of birch) we…
The diffusion process of nanoparticles in a polymer matrix was studied by the single-particle tracking (SPT) method. ZnS-AgInS2 (ZAIS) nanoparticles were dispersed in poly(dimethylsiloxane) (PDMS) and were tracked before and 20 hours after adding a curing agent in the PDMS. The averaged diffusion coefficients of the Z…
The hot-rolling deformation resistances of a TRIP Steel were studied by using a Gleeble-3500 thermal simulator. The true stress-true strain curves of the TRIP steel is determined under different hot-rolling deformation conditions, and the effect of deformation temperature, strain rate and deformation amount on the def…
Lactobacillus delbrueckii has been widely used in combination with Streptococcus thermophilus for yogurt fermentation. It has genes encoding both D- and L-type lactate dehydrogenase (LDH) that catalyze the production of L (+) or D (-) stereoisomer of lactic acid, respectively. D-lactic acid is the primary lactate prod…
Diffusion chromizing of tool steel has been investigated, using a powder method modified by the use of low pressure during the process for the avoidance of the oxidation of the batch. Innovative chromizing novel processes have been carried out in a hot-wall vacuum oven. The processes have been performed in a chromium…
The structure constant, as it is defined in ripple theory of magnetization direction, is a parameter that characterizes the magnetic behavior of thin films. These thin films are obtained by electroplating at different density of current. At a specific composition, Co86Fe4P10, the thin films obtained by this method are…
Sintered (Nd0.6 − x Ce x Dy0.4)14.4(Fe0.72Co0.28)balB6.4 (at %) materials (with x = 0.03–0.23) have been studied. A correlation between the compositions of the base magnetic phase and sintered material has been found. It is shown that alloying with cerium can decrease the absolute value of the temperature coefficient…
The effect of chlorine plasma treatment on electronic properties of GIZO grown on SiO 2 /Si by RF magnetron sputtering was investigated using Xray photoelectron spectroscopy (XPS), reflection electron energy loss spectroscopy (REELS), and secondary ion mass spectroscopy (SIMS). SIMS depth profiles indicated that the c…
This study focused on the simple fabrication method of temperature-responsive cell culture surfaces by physical polymer coating. We synthesized diblock copolymers of poly(butyl methacrylate)-b-poly(N-isopropylacrylamide) (PBMA-b-PIPAAm) with various thermoresponsive PIPAAm chain length. Polymers were dissolved in mixe…
Examination of the behavior of materials under very high speed plastic deformation are widely used during the designing process of dynamically loaded steel structures. Steel is widely used as a basic material for designing engineering structures. Characteristics of steel obtained under static experiments are different…