Materials Literature
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The electron induced effect on the first stages of the titanium (Ti0) oxidation and titanium dioxide (Ti4+) chemical reduction processes has been studied by means of Auger electron spectroscopy. Using factor analysis we found that both processes are characterized by the appearance of an intermediate Ti oxidation state…
Microstructures and magnetic properties of Pr-Fe-Co-B bonded magnets were investigated. The magnets can be represented by the formulae, Pr14Fe63.9Co16B6M 0.1 (M = Ti, V, Cr, Ni, Zr, Nb or Mo), Pr14Fe63.8Co16B6Nb 0.1T0.1 (T/= Al, Si, P, Cu or Ga) and Pr14Fe63.6Co16B6Nb 0.1R0.3 (R = Gd, Tb or Dy). The effects of additio…
Rare earths (RE) have been used to increase high temperature oxidation resistance of chromium dioxide and alumina forming alloys. The RE can be added as elements (or oxides) to the alloys or applied as an oxide coating to the alloy surface. RE oxide gels, obtained by the sol-gel technique, were used to coat Fe-20Cr sp…
Doped lanthanum chromite has been used in solid oxide fuel cell (SOFC) interconnects. The high costs involved in obtaining dense lanthanum chromite have increased efforts to find suitable metallic materials for interconnects. In this context, the oxidation behavior of lanthanum chromite coated Fe-20Cr and Fe-20Cr-4Al…
Biomaterials (composites and blends) play a major role in the health of modern society. This paper reports on the preparation and characterization of polyvinylidene fluoride (PVDF) and hydroxyapatite (HAP) composites, analyzing the incorporation of HAP in PVDF and investigating their mechanical properties and cytotoxi…
AZ31 is a magnesium alloy possessing good mechanical properties, which makes it particularly attractive for automotive applications. Yet, in order to advance the utilization of this alloy, a broad database of its superplastic behavior is needed. This work presents the results of a comprehensive study on the elevated t…
We prepared size-controlled silicon quantum dots superlattices (Si-QDSLs) by thermal annealing of stoichiometric hydrogenated amorphous silicon carbide (a-SiC:H)/silicon-rich hydrogenated amorphous silicon carbide (a-Si 1+ x C:H) multilayers. Transmission electron microscope (TEM) observation revealed that silicon qua…
A trichromophoric molecule consisting of a porphyrin linked to both a dihydropyrene and a dihydroindolizine-type photochrome, in combination with a third harmonic generating crystal, functions as a 1:2 digital demultiplexer with photonic inputs and outputs. Each of the two photochromes may be cycled independently betw…
Abstract In the presence of citric acid (CA), one‐step extrusion processing is used to prepare poly(lactic acid)/thermoplastic dry starch (PLA/DTPS) blends (50/50, %, w/w) in a single‐screw extruder. The rheological study proves that CA decreases the viscosity of both DTPS and of DTPS/PLA blends. The low viscosity inc…
Triangular gold nano-plates have been synthesized by thermal decomposition of Au(I) dodecyl-mercaptide (i.e., AuSC12H25) dissolved in poly(vinyl acetate). Such special shape was achieved because of the ability of polymer side-groups (i.e., the acetate groups) to be selectively absorbed on the most acid faces of the gr…
Metal complexes were synthesized on the basis of the copolymers of radiation grafted poly-4-vinylpyridine onto polyethene and polytetrafluoroethene. The formation of the complexes was carried out in solutions of the following salts: FeCl3•6H2O, CoCl2•6H2O, VOSO4•5H2O, Na2MoO 4•2H2O and Na2WO4•2H2O. The introduction of…
Replacement of conventional materials by polymeric materials (blends/composites) with improved mechanical performance is of immense importance for modern technology. Blending of fluoro polymers can contribute to such synergistic properties. PVDF, as a semi-crystalline fluoro polymer, has been blended with PVF fluoro p…
Deterministic polynomial-time root-finding algorithm for univariate polynomials with coefficients from k[x,y] where k is a field of any characteristic is constructed. Our algorithm can be viewed as an extension of the Roth-Ruckenstein's root-finding algorithm to polynomials from k[x,y][T].
Describing digital measurement device of kinematical parameters of electrical machines of technological equipment. The measurement device was worked out on base of modern microcontroller with realization of principle of separate architecture of system software.
In clause polemic of the author with philosophy of a postmodernism concerning understanding of a category of the law is stated. Subject of polemic is denying by postmodernists of the social law, or «the great legend» as they name any generalization, called to explain the world acts. The author specifies theoretical de…
The mechanism of expert system's fuzzy logic conclusion for decision making on technological adjustment of a combine harvester is considered.
The program module of Sudan determined list decoder for Reed-Solomon codes is developed. The block diagram and program realization of decoder are constructed. A part of the realization is based on the effective factorization algorithm of Roth-Ruckenstein.
The technique of definition of potentials of a zero charge of metals on size of wear process is developed at polarization with simultaneous ultrasonic influence in a regular one-, two-nuclear spirits and glycerin.
We exploit the force spectroscopy capabilities of the atomic force microscope in characterizing the local elasticity of rubber-like materials. Extraction of elastic properties from force curves usually relies on the linear theory pioneered by Hertz. While the Hertzian force-indentation relationships have been shown to…
The traumatic influence is considered from the three points of view: the first point - from the general characteristics of the clinical dynamics, the second point - from the pathological genesis of such disturbances, the third point - from the possibilities of diagnosis and therapy of the psychopathological consequenc…