Materials Literature
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A numerical manifold method (NMM) for plane micropolar elasticity is proposed in this paper to consider the microstructure influence of materials. First, the basic formulations of plane micropolar elasticity are briefly introduced. Then, the equations of stiffness matrix, boundary conditions, and equivalent force in m…
Abstract Highly loaded copper catalysts supported on alumina are synthesized applying the cyclic two‐step CVD of the precursor copper(II)diethylamino‐2‐propoxide in a fluidized‐bed reactor. Copper/zinc oxide/alumina composites are synthesized by either the CVD of the precursor bis[bis(trimethylsilyl)amido]zinc on Cu/A…
Chitin and its deacetylated derivative, chitosan, are non-toxic, biodegradable biopolymers currently being developed for use in biomedical applications such as tissue engineering scaffolds, wound dressings, separation membranes, antibacterial coatings, stent coatings, and sensors. Recently, nano fibrous scaffolds base…
Physical spin crossover (spin transition), one of the most fascinating dynamic electronic structure phenomena occurring in coordination compounds of third row transition metal ions, mostly of iron(II), iron(III) and cobalt(II), has attracted increasing attention by many research groups. Some examples for physical and…
The optical absorption and nuclear magnetic resonance spectra of Li4 − x Cr3x Ti5 − 2x O12 (x = 0, 0.01, 0.02, 0.04) solid solutions have been investigated. It has been found that, in the Li4Ti5O12 spinel, lithium ions migrate from tetrahedral to octahedral positions with increasing temperature. Doping of chromium to…
Tungsten trioxides (WO3) nanorod arrays had been fabricated at different substrate temperatures by hot filament chemical vapor deposition. The morphology of the WO3 nanorod array is significantly dependent on the substrate temperature in a relatively narrow range (600–800 °C). Through the x-ray diffraction pattern, di…
Four achiral polymers with V-shaped bent-core mesogens in the main chain have been synthesized by polycondensation, and the effect of acute-angled central cores (Ar = 1,2-phenylene or 2,3-naphthylene) and lateral halogen substituents (X = F or Cl) was studied. All polymers were only soluble in strong acids such as H 2…
Shape Memory Alloys (SMA) are smart materials that have attracted increasing attention due to their superior damping properties when compared to conventional structural materials. These functional materials exhibit high damping capacity during phase transformation as well as in the low temperature martensitic state. I…
Here, we report the role of crystallite size and surrounding medium on the upconversion emission of Er3+ in BaTiO3 oxide nanocrystals. The samples were prepared by sol-emulsion-gel method and heat-treated at two different temperatures yielding powders containing nanoparticles of different sizes. Green (550 nm) and red…
Modeling of the three phase electric arc furnace and its voltage flicker mitigation are the purposes of this paper. For modeling of the electric arc furnace, at first, the arc is modeled by using current-voltage characteristic of a real arc. Then, the arc random characteristic has been taken into account by modulating…
The results of studies on diffusion in a layered Cu-Au film system of a variable thickness (20–3 nm) obtained by the methods of electron diffraction, X-ray diffraction, and resistance measurements are given. It has been found that, regardless of the order in which the components are condensed on a substrate, a variabl…
The parameters on pore structure of Portland cement pastes blended respectively with 0, 10, 20, 30 and 40% perlite admixture at 3，28，60 curing day were determined by Mercury Intrusion Porosimetre and presented in the paper to investigate affection on performance of cement-based material due to mix the admixture. The r…
Molecular dynamics calculations were carried out in single crystal magnesium specimens to reveal the dependence of strain rate, temperature, and orientation of the crystal on damage evolution as defined by pore growth. Two specific crystallographic orientations [0001] and [Formula: see text] were examined. During a [0…
We demonstrate the ability to use photoactivated stress relaxation to improve flaw tolerance in network polymers. Unlike most self-healing polymers, which effectively close flaws by locally introducing healing agents (such as uncured resins), here light is used to relax elevated stresses around a flaw before it reache…
Potentiodynamic and potentiostatic polarization measurements were conducted in 0.9% NaCl solution to investigate the localized corrosion susceptibility of two austenitic stainless steel biomaterials: a low nitrogen, according to ASTM F 138 - the metallic material most widely utilized today in orthopedic applications;…
Spall (dynamic fracture) strength of A12024-T4 and SS304 alloy have been determined at high strain rate. Gas gun experiments have been conducted on A12024-T4 and SS304 target plates in symmetric impact configuration. The spall in A12024-T4 and SS304 plates has been achieved by impacting them with parallel flying plate…
Abstract In this paper, measurement of various plasma parameters during pulsed laser deposition of ZnO thin films on Si (100) substrates is reported. The variations of electron number density and electron temperature with ambient pressure and target substrate distance is obtained via spectroscopic measurements. The st…
The 1D spin transition compound [Fe(L1) 3 ](ClO 4 ) 2 ( 1 ) with L1 = ethyl-4H-1,2,4-triazol-4-yl-acetate, a novel neutral bidentate ligand, has been synthesised. The temperature dependence of the high-spin molar fraction derived from 57 Fe Mossbauer spectroscopy reveals an exceptionally abrupt single step transition…
Sm3+,Eu(3+)-codoped TiO2 nanoparticles were prepared by a facile sol-gel-solvothermal method. Sm3+ and Eu3+ were successfully incorporated into a TiO2 lattice and resulted in intense emission lines with resolved crystal-field splitting, in spite of a large mismatch in ionic radius between trivalent lanthanides (Ln3+)…
This paper presents an investigation on the fluorescent properties of semiconductor CdTe quantum dots (QDs) self-assembled on the surface of PVP (polyvinylpyrrolidone)-capped silver nanoparticles (NPs) by the ligand field effect. A significant 2.5-fold enhancement in the integrated fluorescence intensities, red shift…