Materials Literature
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Abstract \nThanks to its low cost and high flexibility, in the last few years the winding technique has been successfully adapted for the production of complex Ceramic Matrix Composite (CMC) components with load-oriented fibre alignment. Since the winding angle can be adjusted in any direction (from 0° to 90°) dur…
The paper presents a numerical model for infiltration of porous preforms of ceramic materials in the process of sintering. The mathematical model of infiltration is based on the Richards equation and Van Genuchten formulas describing permeability properties of the porous structure and the infiltrant. A finite-element…
X-ray mapping in electron microscopes with energy dispersive spectrometry (EDS) builds on the basics of qualitative X-ray microanalysis by providing a visual representation of the elements present. Mapping routines have long identified elements within a sample and displayed the elemental distribution in an image map o…
The deviation of the relaxation spectrum from the Debye type is studied experimentally and the presence of the non-Debye relaxation is shown, which is defined in different temperature ranges either by proton multiposition transitions below the Curie point T c or relaxation domain and interphase boundaries in the vicin…
Transformer parameters such as leakage inductance and self-capacitance are rarely calculated in advance during the design phase, because of the complexity and huge analytical error margins caused by practical winding implementation issues. Thus, choosing one transformer architecture over another for a given design is…
In this paper influence of uniaxial stress loading on local changes of magnetic properties in a non-oriented silicon steel was examined. The measurements were carried out for different direction of loading force in respect to the rolling direction of the steel. Impact of the relationship between the rolling and the lo…
New composite materials based on a syndiotactic polypropylene (SPP) and nanosized carbon fillers of various types (graphene nanoplates (GNP) and fullerene) are obtained by polymerization in situ. It is shown that the introduction of nanocarbon particles did not lead to a significant decrease in the activity and stereo…
Nanocomposite coatings were obtained by aggregation of nanoparticles from dispersion in decane on the surface of oxide coatings. Oxide coatings on magnesium alloy were formed by plasma electrolytic oxidation in silicate containing electrolyte in bipolar mode. Electrochemical properties and stability of nanocomposite c…
Results of the study of structural and electronic properties of the 8-ZGNR/h-BN(001) heterostructure by the pseudopotential method using plane waves within density functional theory are presented. Within one approximation the features of the spin state at the Fermi level are studied along with the role of the edge and…
Исследованы мелкодисперсные металлические порошки жаропрочного сплава ЭП648-ВИ для адаптивной лазерной LMD-наплавки, полученные методом атомизации на установке HERMIGA 10/100 VI. Показано, что полученные при распылении холодным и горячим газом мелкодисперсные порошки имеют низкое содержание кислорода, сферическую форм…
Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
High-Birefringence Nematic Liquid Crystals Mixtures (HBNLCM) recently developed in the Military University of Technology (Poland) are presented in this paper. Dielectric, refractometric, viscosimetric and elastomeric characteristic were determined. The properties are discussed in terms of their applicability to electr…
We studied the effects of the composition of impregnating solution and heat treatment conditions on the activity of catalytic systems for the low-temperature oxidation of CO obtained by the impregnation of Busofit carbon-fiber cloth with aqueous solutions of palladium, copper, and iron salts. The formation of an activ…
A set of multicomponent perovskite oxide nanoparticles based on La1-xSrxCo1-yFeyO3-δ(LSCF) were prepared by a simple chemical precipitation method for application in low temperature solid oxide fuel cells (LT-SOFC) as cathode materials. The precursor materials used in this synthesis were lanthanum nitrate hexahydrate…
Modifying of alloys is an important part of the metallurgical process and involves the course also of alloys of aluminum, specifically the Al-Si (silumin) in our case. One of the elements that it is possible used to modify for type of alloy Al-Si is antimony (Sb). This paper investigates potential impact of the modifi…
Hairiness results of Zweigle G566, Uster Zweigle Hairiness Tester 5 (UZHT5) and Uster Tester 5 S800 (UT5) have been compared for ring, compact and vortex yarns. For this purpose, 100% cotton, cotton-Tencel LF (67:33, 50:50 and 33:67) and 100% Tencel LF yarns have been produced from each spinning system. In general, co…
We study the effects of film thickness on lattice parameters, direct band gap and photovoltaic outputs in the sol-gel derived BiFeO 3 thin films. With the change of the film thickness, the great transitions will take place in the preferred orientation and lattice parameters. Furthermore, the photovoltaic outputs are s…
N-(2-thiazolyl)methacrylamide (TMA) monomer was synthesized from 2-aminothiazole by two different methods. The homo- and copolymerization of this monomer with methyl methacrylate (MMA), styrene (St), acrylonitrile (AN), and vinyl acetate (VA) were performed in dimethyl formamide using 1 mol% AIBN at 70°C. The copolyme…
Decades of hydraulic turbine operation around the world have shown one undeniable fact; welded turbine runners can be prone to fatigue cracking, especially in the vicinity of welds. In this regard, three factors are essential to consider in runner fatigue assessments: (1) the runner's design, which can induce stress c…
The energy spectra of a Thue-Morse superlattice based on monolayer graphene containing a band gap are studied. The lattice consists of rectangular barriers located along the x axis. It is proposed that aperiodic Thue-Morse modulation be produced by a difference in the gap width in different elements of the superlattic…