Materials Literature
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The chemical composition of deposits on submersible nozzles in casting aluminum-bearing steel is analyzed. To understand their origin, attention turns to surface phenomena in steel smelting and, specifically, to the wettability of contacting phases. Analysis of literature data regarding contact phenomena in melts perm…
We have synthesized nanoparticulate cobalt(II) hydroxide containing Co2+ in tetrahedral oxygen coordination (Co Td 2+ ), atypical of such systems: nano- [Co(OH)2(H3O) δ + ]δ+. The (Co Td 2+ ) coordination in the hydroxide is inferred from its electronic diffuse reflectance spectrum, which shows a multiplet of strong a…
The crystal structure of KLaMo(CN)8 · 9H2O was determined from X-ray diffraction data. The crystals are monoclinic, space group P21/c, a = 8.7451(4), b = 25.2761(13), c = 10.6744(5) Å, β = 117.059(3)°, V = 2101.22(17) Å3, Z = 4, ρ(calcd) = 2.037 g/cm3, R = 0.0242, wR 2 = 0.0500 for 5656 independent reflections. The co…
Abstract Based on a micormechanical model we describe the material behaviour of specimens made of shape memory alloys by a finite element implementation. These materials undergo solid to solid phase transformations during loading and unloading which determine the characteristic pseudo‐elastic or pseudo‐plastic materia…
Abstract Durch die Kombination von unterschiedlichen metallischen Werkstoffen lassen sich maßgeschneiderte Konstruktionen mit optimierten Eigenschaften herstellen. Die Herstellung von Werkstoffverbunden ist jedoch häufig mit hohen Anforderungen an die Fertigungstechnik verbunden. Schwerpunkt dieser Untersuchung ist da…
The incorporation of carbon nanotubes (CNTs) into polymers is expected to improve the physical properties of polymers and fiber-reinforced plastics. Moldability of CNT-dispersed polymers is the key technology for the successful improvement of properties. As CNT length has great impact on the moldability (e.g., viscosi…
Abstract Based on the solid phase/liquid deposition CdSe quantum dots (QD) were synthesized using selenium and cadmium‐salt as precursor at room temperature. The average diameter of CdSe QD estimated from the high resolution transmission electron microscopy (HRTEM) graph and absorption spectra was ca. 3–3.5 nm. The me…
Low pressure carburising in combination with high pressure gas quenching has gained an increasing importance in the case hardening of highly stressed components. With the introduction of acetylene as carburising gas and the further development of the systems engineering, this technology has found broad acceptance in t…
Abstract The microstructure and mechanical properties of Ti‐63 pancakes were investigated under different heat‐treatment modes. Pancake No. 1, with an as‐forged bimodal structure, was β annealed at 930°C for 1 h. Its structure was changed to a Widmanstatten structure with continuous grain boundary α phase and long lam…
We report on the structural transformations of carbon filled SBA-16 mesoporous silica at 10 Gigapascal pressure and temperatures between 25 and 1800 °C in a multi-anvil apparatus. The silica begins to crystallize in the coesite structure at 400 °C under retention of the mesophase order. An irregular mesostructure of c…
Abstract A novel phosphorus-containing unsaturated polyester resin/SiO 2 hybrid nanocomposite was prepared from the in-situ curing of unsaturated polyester resin (UP) and triethoxysilane (DI) which was synthesized from the nucleophilic addition reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) and…
Abstract A series of hyperbranched poly(amine-ester) polyols were synthesized by the polycondensation of N,N-diethylol-3-amine-methylpropionate [prepared by the Michael addition reaction of methyl acrylate (MA) with diethanolamine (DEA)] as an AB2-type monomer with trimethylol propane (TMP) as the core moiety, proceed…
We describe the theoretical study of chemical and physical properties of inorganic nanoparticles consisting of 3d, 4d and 5d atoms in the frame of shell model. The important ingredient of our study is the size dependent evolution of electronic properties of shells depending on the electron structure of atoms. The vari…
Abstract A novel shape memory polymer based on conetworks (CNs) was synthesized. These conetworks consisting of poly(methyl methacrylate) and poly (ethylene glycol) diacrylates showed excellent shape-memory properties with a recovery ratio of nearly 100%. Moreover, different shape memory effects were discovered in dif…
The transfer curve of the giant-magnetoresistive (GMR) magnetic head represents its most important property in applications, and it is calculated by the micromagnetic modeling of the free layer and the pinned layer in the heart of the GMR head. Affections of the bias hard magnetic layer and the anti-ferromagnetic pinn…
Tveitite-(Y) as pods up to 10 cm across has been found at Mt. Rovgora, the Western Keivy, Kola Peninsula, Russia, in an albite-quartz-amazonite pegmatite vein related to alkaline granite. Tveitite-(Y) grains (up to 4 cm) are parallel microintergrowths of two isostructural varieties, Ca9.5Na1.7Y5.2Ln2.0F42.6 and Ca11.4…
Abstract The aim of this work is to investigate the properties of the PP/EVOH films for their potential use in the packaging industry. Besides, the barrier properties, the mechanical parameters and the morphology of the PP/EVOH films have been studied as function of their composition and the processing technique used…
Magnetotransport measurements in pulsed fields up to 15 T have been performed on mercury cadmium telluride (Hg1−xCdxTe, x∼0.2) bulk as well as liquid phase epitaxially grown samples to obtain the resistivity and conductivity tensors in the temperature range 220–300 K. Mobilities and densities of various carriers parti…
An efficient way to control the lyophilic properties of aluminum surface was suggested: grafting of polymer chains by radical polymerization with atom transfer. The hydrophilicity of the coatings obtained was
Diamonds obtained in the Mg–C system were found to exhibit semi-conducting properties and cubic morphology. In these cases, strict synthesis processing parameters are required (8.0–8.5 GPa and 1800–2100 °C). The present work aims to study the mechanical and electrical properties of diamonds in the new Mg–Ni–C system.…