Materials Literature
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Abstract The cornstarch: poly(vinyl alcohol) (PVA) films characterized by the alternating ratio of starch:PVA (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100) and containing 30% of glycerol were prepared by solution casting. The films were irradiated with an absorbed dose of 25 kGy with gamma rays in a vacuum and with f…
This paper presents a new maximum power point tracking (MPPT) algorithm for thermoelectric generators (TEG). The proposed method is based on implementing an innovative way for indirect detection of the open circuit voltage and short circuit current, which will be used to directly steer the TEG interface converter to t…
The Cauchy problem for the kinetic and electrodynamic equations describing the propagation of an electron flow in a scattering medium and generation of self-consistent electromagnetic field is considered. The electron distribution function is defined in the space of finitely supported generalized functions. Algorithms…
Abstract Understanding and improving the mechanical properties of tungsten is a critical task for the materials fusion energy program. The plastic behavior in body‐centered cubic (bcc) metals like tungsten is governed primarily by screw dislocations on the atomic scale and by ensembles and interactions of dislocations…
The study of the aggregation of small molecules in solution induced by metallophilic interactions has been traditionally performed by spectroscopic methods through identification of chemical changes in the system. Herein we demonstrate the use of SAXS (small-angle X-ray scattering) to identify structures in solution,…
The catalytic oxidation of methane over a nickel foil has been investigated in a wide range of methane: oxygen molar ratios at a constant reactor temperature of 680°C. Under oxygen-deficient conditions, the reaction takes place in the self-oscillating mode. Stable self-sustained oscillations of the methane oxidation r…
We have found new exact analytical expressions of the deflection of various plane truss structures and analyzed the existing ones. Truss deflections have been calculated by the Maxwell-Mohr formula assuming the elastic behavior of the truss elements using the method of induction on the number of panels. We have carrie…
A carbatripyrrin intermediate was prepared from commercially available technical-grade indene and 2-pyrrolecarbaldehyde in three steps and 50% overall yield. This novel conjugated structure reacted with pyrroledialdehydes and 2,5-furandicarbaldehyde in the presence of TFA to give good yields of carbaporphyrins and an…
The hierarchical assembly of collagen-based triple helical peptides into disks, followed by metal-promoted assembly into microcages is described. The length of the triple helix was found to correlate to the height of the disks that formed, providing mechanistic insights into their formation. The encapsulation of fluor…
In the present communication, the effect of mercerization or alkali (NaOH) treatment on mechanical and wear behavior of chopped roselle fiber-reinforced vinyl ester (CRFRV) composite have been studied as the function of fiber content. The results show that the tensile, flexural and impact strength values of untreated…
In this paper, preferentially oriented (002) ZnO thin lms have been grown on Si (100) and glass substrates using radio frequency magnetron sputtering. The dependence of the quality of the ZnO thin lms at dierent substrate temperatures on the growth is studied. A ZnO thin lm with c-axis-oriented wrtzite structure is ob…
:We analysed syntype material of Odontidium harrisonii W. Smith, Odontidium mutabile W. Smith, Odontidium tabellaria W. Smith, Odontidium tabellaria var. β W. Smith, Odontidium parasiticum W. Smith, Odontidium parasiticum var. β W. Smith and Fragilaria brevistriata Grunow in Van Heurck. A combination of light and scan…
The corona-generated audible noise (AN) factor is an important consideration in the design and operation of ultrahigh voltage direct current (DC) and alternate current (AC) transmission lines. Due to the differences in discharge process and corona-generated space charges between the DC and AC corona discharge, the aud…
The deactivation and regeneration of selective catalytic reduction catalysts which have been used for about 37,000 h in a coal power plant are studied. The formation of Al2(SO4)3, surface deposition of K, Mg and Ca are primary reasons for the deactivation of the studied Selective catalytic reduction catalysts. Other f…
In the present study, the non-isothermal early stages of surface oxidation of liquid Mg-1%Y alloy during casting were studied under UPH argon, dry air, and air mixed with protective fluorine-bearing gases. The chemistry and morphology of the surface films were characterized by SEM and EDX analyses. The results indicat…
Abstract This article deals with the risk of environmentally assisted cracking of steel structures that are kept under cathodic protection (CP). The experimental results collected on both hydrogen diffusion and hydrogen embrittlement (HE) of high-strength low-alloy (HSLA) steels under CP are discussed. Hydrogen diffus…
In order to solve the problem of inadequate penetration of low-density jet penetrating shell charge, the low-density PTFE are modified by adding a certain fraction of copper powder in the matrix. This treatment helps to increase the material density and jet energy, as well as to improve the static and dynamic mechanic…
Deferrized glass was produced by the reduction smelting of basalt batch in a graphite crucible at a high temperature. The deferrized continuous fiber has higher glass transition and drawing temperatures, lower crystallization ability and enhanced thermal stability in comparison with those of the original basalt fiber.
The process of manufacturing iron cores for electric machines out of electrical steel can drastically influence the magnetic properties of the material. It is well known that the local soft magnetic properties are degraded by the cutting process. In the production process the material also experiences tensile and comp…
Abstract We have investigated the influence of Ag doping on zinc oxide thin films. Pure and Ag doped, preferentially oriented transparent zinc oxide thin films were prepared by sol gel technique on a glass substrate using diethyl amine as a stabilizer. The X-ray diffraction analysis revealed that the films with hexago…