Materials Literature
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The electron spin resonance (ESR) spectrum has been measured in X-ray-irradiated CdS-doped glass before heat treatment to examine the possibility of using such glass as a dosimetric material. No ESR signal is observed before X-ray irradiation, but it was observed after X-ray irradiation. The intensity of the ESR signa…
The syntheses of the complex nickel salt [NiL2] · 2H2O (I) (HL is 2-[2′-(oxymethyldiphenylphosphinyl) phenyldiazenyl]-4-tert-butylphenol) was described. The basic vibrational frequencies in the IR spectra of I were interpreted. Crystal structure of I was determined by X-ray crystallography: the crystals are triclinic,…
Results from tests of multilayer nitride Ti x N and (TiAlZrMo) x N coatings resistance to downtime and high-temperature corrosion in steam are presented.
It is shown that fullerenes C20 of the $$ \bar 5\bar 3 $$ m symmetry can form seven types of low-symmetry species of the initial “mother” fullerene molecule by means of continuous deformation. Possible routes of formation and continuous transformations of these species are presented on the adjacency graph of structura…
Conditions under which nickel coatings can be deposited from a chloride electrolyte at a high rate were studied. The mechanism of this process was suggested and experimentally confirmed. The mass-transfer rate of nickel-containing particles was determined by chronopotentiometry, with temperature raised from 20 to 50°C…
In this study, three types of BaTiO _{3} powders with different particle sizes synthesized by hydrothermal method were used to fabricate the lead-free barium titanate piezoelectric ceramics. The BaTiO _{3} ceramics from these three types of BaTiO _{3} powders were sintered at different temperature(1150–1350°C) using t…
Considering two-sublattice pseudospin lattice coupled mode model [Chaudhuri et al., J Phys Soc Jpn, 49(1980) 609] along with third-and fourth-order phonon anharmonic interaction terms and using double-time thermal Green's function method, expressions for shift, width, renormalized soft mode frequency, Curie temperatur…
The stoichiometric LaTiO 2 N and cation nonstoichiometric La 1−x Ti 1+x O 2 N and La 1−x Sr x TiO 2 N compounds have been prepared in order to clarify the influence on body colors from the viewpoint of particle sizes by controlling the nitriding temperatures and the cation nonstoichiometries. In case of preparing the…
For the study of the relationship between the domain wall motion (DWM) and the coercivity in the samples of Dy-free Nd-Fe-B sintered magnets, the DC susceptibility ( • • DC) in the initial magnetization from the thermally demagnetized state and the DWM in the partially demagnetized state after the full magnetization i…
Features of gas-flame supersonic spraying (GFS) methods of coating are discussed. Comparison of typical models of equipment used for these processes—JP-5000, DJ, and Intelli-Jet units—is performed with respect to their gasdynamic parameters, spraying capacity, material utilization factor, and cost of coating applicati…
The synthesis of composite sorbents from porous silica modified by polyvinyl alcohol was studied. The initial silica retained its porosity after modification which was performed by application of polyvinyl alcohol from aqueous solution. The subsequent thermal or microwave treatment gave nanolayers of water-resistant p…
Quasiperiodic Ba 0.9 Sr 0.1 TiO 3 (BST) multilayers have been fabricated on SrTiO 3 substrates by using chemical solutions containing polyethylene glycol (PEG), and effect of PEG content on optical properties of the BST multilayers have been investigated. Each multilayer with a single perovskite phase displays a layer…
In this paper simulation results for integration of CO2 pre-combustion capture by steam methane reforming (SMR) in membrane reactors (MR) with natural gas fired combined cycle (NGCC) power plants are presented. The integrated combined cycle was simulated by GTPRO (Thermoflow) simulator along with the results from simu…
The generalized Maxwell model is formulated as a nonlinear relaxation equation for the symmetric traceless stress tensor. The relaxation term of the equation involves the derivative of a potential function with respect to the stress tensor. Two special cases for this potential referred to as “isotropic” and “anisotrop…
Bi 2 Te 3 - Sb 2 Te 3 solid solutions, the most commonly used room temperature thremoelectrics, are characterized by inhomogeneities and defects of various types, and doping aggravates the situation with crystal homogeneity. However, several publications reported on unusual behaviour of Sn in Bi 2 Te 3 , specifically,…
Results of investigation of glass formation in the HgBr2-PbBr2-CsBr system are presented. The glass formation region has been outlined. Characteristic temperatures have been determined by differential thermal analysis, and the ratio T g /T m and factor HR have been calculated for vitreous samples of the HgBr2-PbBr2-Cs…
The nature of and reasons for weld joint failure in the hot reheat (HRH) steam lines of an 800-MW power unit are analyzed. It is shown that the weld joint destruction happened in the softened area and is typical for the weld joints operating for a long time under creep conditions. Numerical simulation demonstrated tha…
We have introduced in-situ growth of Ge2Sb2Te5 (GST) nanoparticles with 10 nm of average diameter by pulsed laser ablation directly on Pt/Ir-coated AFM tips and investigated their microstructure and phase formation using scanning and transmission electron microscopy. In addition, Fourier transform analysis of electron…
The appearance and long-term stability of peri-implant bone, mucosa, and gingiva determine the success of implant-supported prostheses from both the esthetic and functional standpoints. Any surgical or prosthetic technique that takes into consideration only some variables, or that only intervenes in a limited phase of…
In this paper, the surface of nano-lanthanum oxide was modified, and the different surface characteristics of modified nano-lanthanum oxide were analyzed. Meanwhile, the influence of surface modification on the tribological and mechanical properties of polytetrafluoroethylene nanocomposites was investigated. Results i…