Materials Literature
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A new 3D percolation network model is proposed to analyze the effects of CNTs alignment on electrical conductivity of polydimethylsiloxane (PDMS)/CNTs composites, wherein the polymer-type dependent formula is employed to adjust data in comprehensive experiments. In the Monte Carlo simulation, the percolation threshold…
This paper is focused on a new approach, which was aimed to ease up the development of Fe-Cr-Co-Mo permanent magnets. Tri-arc melting technique under inert atmosphere of argon was used for the development of Fe-Cr-Co-Mo alloy. Solution treatment was done at a temperature of 1250 °C for 5 h followed by water quenching…
Abstract The crystal chemical features of the bulk and the uppermost (001) surface layers of freshly cleaved surfaces of two trioctahedral Fe-rich mica-1 M (space group C 2/ m ) polytypes, i.e. a tetraferriphlogopite from an alkaline-carbonatitic complex near Tapira, Belo Horizonte, Minas Gerais, Brazil, and an Fe 2+…
Abstract The crystal structure and the chemical composition of a paravauxite from the Siglo Veinte Mine, Llallagua, Bustillo Province, Potosi Department, Bolivia [ Fe (Fe 0.916 2+ Mn 0.016 2+ Mg 0.064 Ca 0.002 ) ∑0.998 Al (1) Al (2) Al 2.005 P (P 1.998 Si 0.002 ) ∑2 O 8 (OH) 2 ·8H 2 O, a = 5.242(1) Å, b = 10.569(2) Å,…
The search for new materials with properties suitable for specific applications has increased the number of research studies to fill the market demands. The development of polymer composites by the addition of inorganic fillers to the poly(methyl methacrylate) (PMMA) increases the potential use of this polymer in vari…
A mechanism of collective overcoming of point defects by dislocations during the over-barrier slip has been proposed. It has been shown that the interaction between dislocations promotes the overcoming of point defects at a high dislocation density.
There is a solution of the problem of stress-strain state determining in a concrete thick-walled tube, when the temperature field and the neutron fluence at the inner face are set. The mutual action of the specified factors is identified in this axisymmetric problem, as well as influence of inhomogeneity of shell mate…
In this paper, we try to study the effect of two different ionic and nonionic amines dodecylamine (DDA) and hexadecyldimethylamine (DMHA) considered as weak bases and surfactant on the growth of ZnO nanorods using hydrothermal synthesis technique. The self-assembly of oriented attachment (OA) of ZnO nano- and microrod…
Masamichi Shiono, Mari Sakaue, Mami Konomi, Junichiro Tomizawa, Eiko Nakazawa, Koji Kawai, Susumu Kuwabata; Ionic Liquid Preparation for SEM Observation of
Piezoelectric materials respond to external stimuli by adjusting atomic positions. In solid-solutions, the changes occurring in atomic scale are very complex since the short- and long-range order are different. Standard methods used in diffraction data analysis fail to model the short-range order accurately. Pressure-…
The problem on radial oscillations of an elastic cylinder with inhomogeneous residual stress (RS) is considered. Two acoustic techniques of RS reconstructing are suggested. Within the framework of the first method, a set of radial displacement values is assumed to be known, while the frequency is fixed. Within the fra…
The Materials Analysis and Particle Probe (MAPP) is a compact in vacuo surface science diagnostic, designed to provide in situ surface characterization of plasma facing components in a tokamak environment. MAPP has been implemented for operation on the Lithium Tokamak Experiment at Princeton Plasma Physics Laboratory…
We put forward a nite element method for static problems of cubic quasicrystals by variation of a suitable general potential functional. As an example we study a quasicrystal column containing a penny-shaped crack. The comparison with analytical results shows that the precision and eciency of the numerical solution ar…
Calcium phosphate cements (CPCs) with osteoconductive properties are limited in their applications because of their poor mechanical properties. This study investigated the additive effect of Dexamethasone-doped Halloysite Nanotubes (HNTs on the mechanical properties of CPCs. HNTs are nanosized tubes with alumino-silic…
The complexes [Ni(Pn) 2 ] 2 [Fe(CN) 6 ] · 3H 2 O ( I ), [Ni 3 (Pn) 5 ][Fe(CN) 6 ] 2 · 9H 2 O ( II ), [Ni 5 (Pn) 9 ][Fe(CN) 6 ] 3 · 9H 2 O ( III ), and [Ni(Pn) 2 ] 3 [Fe(CN) 6 ] 2 · 6H 2 O ( IV ) (Pn = 1,3-diaminopropane) were obtained. Their thermolysis was studied in oxidative (air), reductive (hydrogen), and inert a…
The evolution of structural parameters of deformation fragments and dynamically recrystallized grains during severe plastic deformation in a Bridgman chamber as the number of complete revolutions in torsion at room temperature increases is analyzed using transmission electron microscopy and electron backscattered diff…
The present study evaluates the influence of the residual stress on the oxidation rate of Zr at 650°C. It is shown that the oxidation rate can be substantially decreased by shot-peening. A systematic instigation of the various factors (such as the residual stress, the surface pollution and the chemical composition of…
A set up originally designed for e31fmeasurements of piezoelectric thin films was operated in a way to assess life time issues with simultaneous recording of polarization change, PV-loop integral, and piezoelectric beam deflection. A 1μm thick PZT 53/47 thin film was subjected to 109unipolar pulses with 150 kV/cm driv…
In recent years much attention has been devoted to expanded macrocyclic chemistry. Nevertheless, while several advancements were achieved in the synthesis of novel expanded porphyrin architectures, not much has been developed in the functionalization of these macrocycles. This report shows the selective replacement of…
The thermal decomposition kinetics of melaminium bis(trichloroacetate) dihydrate (MTCA) has been studied by thermogravimetry and derivative thermogravimetry techniques using non-isothermal experiments at three different heating rates 10, 15, and 20 C min -1 . Non-isothermal studies of MTCA revealed that the decomposit…