Materials Literature
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Studies were carried out to develop cordierite kiln furniture of high hot strength with a view to get longer life. Selection of raw materials was based on lowest possible iron impurities. Three different bonds were prepared by mixing talc, China clay and calcined alumina in different proportions. 50% of each bond was…
The demonstrated perspectives of thiokols application for the creating photo-solidifying compositions. The chemical interaction of a polymerizing component with polysulfide oligomer was found to be responsible for the substantial increase in viscosity that made the shelf period rather short. A content of oligo thiol o…
The solvation of cellulose molecules in water and N -methylmorpholine N -oxide has been investigated by the molecular-dynamics method. An analysis of simulation results yields the conformational characteristics of cellulose molecules in these solvents: the mean-square distance between polymer chain ends and the radial…
The alloying principles of promising new hot-rolled, cold-rolled, and hot-galvanized high-strength steels of various types—microalloyed, rephosphorized, and dual-phase steels—are considered. The basic aspects of their production are noted. Mechanical test data for trial batches are presented.
The subsystem first-order phase transition theory has been directly proved by the theoretical proof for the standard WLF equation, based on the intrinsic 8 orders of instant 2-D mosaic geometric structures, in the glass transition. The theoretical proof shows that the constant c1 in the WLF equation, taking logarithm,…
Features of eddy-current testing of carburized chromonickel steel 30XH3A subjected to processing with continuous laser radiation, subsequent treatment with cold at s-196°C (reducing the content of retained austenite in the carburized layer from 25–40 to 5–10 vol %), and tempering in the temperature range 100–400°C are…
In their paper entitled “Marianoite, a new member of the cuspidine group from the Prairie Lake silicocarbonatite, Ontario”, [Chakhmouradian et al. (2008)][1] presented chemical, crystallographic and structural data on what they claimed is a new mineral species in the cuspidine group. All the
The mechanism of the reaction between thallium(I) selenide and germanium(IV) selenide powders in the Tl 2 Se-GeSe 2 system has been studied by differential thermal analysis and quantitative X-ray diffraction. The results indicate that all of the ternary compounds in the Tl 2 Se-GeSe 2 system are formed through Tl 4 Ge…
The ground states of a few electrons confined in two vertically coupled quantum rings in the presence of an external magnetic field are studied systematically within the current spin-density functional theory. Electron-electron interactions combined with inter-ring tunneling affect the electronic structure and the per…
Abstract Mg and Nb‐doped Mg films were grown by rf magnetron sputtering and their structure was studied as a function of the hydrogen sorption‐desorption cycles. The Nb doping improves the H desorption kinetics: anyway the characteristic desorption time increases in the first eight cycles until the desorption kinetics…
Abstract We demonstrate that the dehydration condensation of 3-aminopropylsilane (APTES) and 3-(2-aminoethyl)aminopropylsilane (AeAPTES) in the presence of alkylsuccinate and alkanoic acid provide layered polysiloxanes where the interlayer is filled with self-assembled carboxylate. Their structure was investigated by…
The historically unprecedented developments of nanoscience and nanotechnology (NT) promise to revolutionize the diagnosis, treatment and prevention of disease and traumatic injury, to relieve pain, and to preserve and improve human health, using molecular tools and molecular knowledge of the body. This article focuses…
We have studied the wetting properties of water droplets onto lattices of square micro-cavities. The contact angle has been measured along the triple line and the obtained values have been compared to both Cassie-Baxter and Wenzel models. Despite the large values of the apparent contact angle, the contact line appears…
Abstract Crystallization analysis fractionation (CRYSTAF) was used for the first time to investigate the solution crystallization behavior of ethylene homopolymers and copolymers made with Phillips CrO x /SiO 2 catalyst. Interestingly, the crystallization peak temperatures ( T p ) of copolymers of ethylene and cyclope…
Centrifugal slurry-pouring method has been proposed to fabricate the functionally graded materials (FGMs) with large compositional gradient. This processing method uses the two types of slurries (slurry 1 and slurry 2). The prepared slurry 1 containing one component, particle A, is firstly poured into the mold under t…
The features of the formation of shrinkage defects (cavities and porosity) were considered with the use of a ProCast software package using a casting made of a magnesium-base alloy as an example. The effect of some parameters of computation (MACROFS, PIPEFS, and FEEDLEN) on the results was studied, and recommendations…
The crystallization times (τx) and crystallization temperatures (Tx) of the phase change material Ge2Sb2Te5(GST) as a function of capping materials was systemically evaluated. SiO2and GeOxcapping materials accelerated the recrystallization of 10nm GST substantially and increased Tx. In addition, the crystallization me…
The effect of an isothermal aging treatment on the embrittlement of 00Cr25Ni7Mo4N super duplex stainless steel was studied by combining metallographic, SEM and TEM observation. The results showed that thermal aging treatment below 500°C and above 1050°C did not have any effect on the impact toughness. The observed emb…
The leather industry discharges large quantities of solid wastes containing high-value native collagen. In this study, the pigskin shavings generated from the shaving of pelts which had been dehydrated with anhydrous sodium sulfate after deliming were pretreated to remove most of salt and fat. Then alkaline treatment…
The challenge of modern drug therapy is the optimization of the pharmacological action of drugs coupled with the reduction of their toxic side effects in vivo. On response is the use of colloidal drug carriers that can provide site specific or targeted drug delivery combined with optimal drug release profiles1,2. With…