Materials Literature
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We present that the tractional flow of a lubricant shows three kinds of limiting shear stresses at which the shear stresses take place independently of the shear rates in its viscous, viscoelastic, and glassy states. We propose three models on the mechanisms for the limiting shear stresses, based on the data of Brillo…
Abstract A series of coordination complexes, [CuCl2(H2L)] (1), [Ni(HL)2]⋅4 CH3CH2OH (2), [Cu(H2L)(dipic)]⋅0.5 HOCH2CH2OH⋅ 2 H2O (3), and [Ni(H2L)(dipic)]⋅0.5 HOCH2CH2OH⋅2 H2O (4) (H2L=2,6‐di(5‐methyl‐1H‐pyrazol‐3‐yl)pyridine, H2dipic=2,6‐pyridinedicarboxylic acid) are synthesized from bipyrazolyl derivative ligands. A…
In the present article, a one-dimensional dynamic thermoelastic problem in a functionally graded material (FGM) thin film subjected to a thermal shock loading is analyzed. An exact analytical solution is obtained by employing techniques of the space-variable transformation and Laplace transform, in the case where vari…
A new species of Leydigia Kurz, 1875 (Cladocera: Chydoridae) is described based on the material from Ciénaga Grande de Santa Marta, Magdalena Department, Colombia. L. lourdesae sp. nov. is a member of the subgenus Leydigia (Neoleydigia) Kotov, 2009, having all diagnostic characters of the latter. It could be the close…
Dynamics of Si(100)-oxidation processes at the Si/SiO2 interface and in the SiO2 region are investigated focusing on SiO and Si emissions from the interface and the following incorporation into the SiO2 and/or substrate. Classical molecular dynamics (MD) simulations with variable charge interatomic potentials are perf…
The aim of research is study The spectral properties (absorption and fluorescence) for Fluorescein Sodium dye by solving it in Ethanol ,at different concentrations (5*10-5,7*10-5 ,1*10-4 , 5*10-4 , 7*10-4 ) mol/L at room temperature . The intensity of absorption increased and fluorescence decreased while concentration…
For a two week period during the Joint European Torus 2012 experimental campaign, the same high confinement plasma was repeated 151 times. The dataset was analysed to produce a probability density function (pdf) for the waiting times between edge-localized plasma instabilities (ELMs). The result was entirely unexpecte…
Organic nonlinear optical materials are widely investigated materials for fabricating optoelectronic devices. Particularly organic π-conjugated systems as well as transition metal complex compounds are studied in this direction because of the strong electronic coupling between the ligand and the metal, their excellent…
When the periodic cellular structure is loaded or swelling beyond the critical value, the structure may undergo a pattern transformation owing to the local elastic instabilities, thus leading to structural collapse and the structure changing to a new configuration. Based on this deformation-triggered pattern, we have…
Structural phase transition sequence of CdSe has been investigated at pressures up to 60 GPa under quasi-hydrostatic conditions using synchrotron X-ray diffraction. A phase transition from the wurtzite type (B4) to the NaCl-type (B1) structure has been observed, followed by another phase transition to an orthorhombic…
An Ni–P alloy coating was obtained by electrodeposition on a 45 carbon steel substrate. The surface appearance of the coating was characterised by Hitachi S-4800 scanning electron microscope. The electrodeposition behaviour was investigated using electrochemical methods. The results showed that the Ni–P alloy coating…
Inelastic scattering techniques provide a powerful approach to studying electron and nuclear dynamics, via reconstruction of a propagator that quantifies the time evolution of a system. There is now growing interest in applying such methods to very low energy excitations, such as lattice vibrations, but in this limit…
Characterization of an α-(Fe 0.75,Cr 0.25 ) 2 O 3 (0001) mixed oxide single crystal surface was conducted using X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS), low-energy electron diffraction (LEED), and temperature-programmed desorption (TPD). After sputter/anneal cleaning in ultrahigh…
Obtaining sub-10 pm spatial resolution by extended X-ray absorption fine structure (EXAFS) spectroscopy is required in many important fields of research, such as lattice distortion studies in colossal magnetic resistance materials, high-temperature superconductivity materials etc. However, based on the existing EXAFS…
Alumina thin films of different thicknesses, e.g. 90, 120 and 150 nm, were grown on SS304 thin foil by electron beam evaporation technique. The films were post-heat treated at 500, 700 and 800°C in air and subsequently characterised by X-ray diffraction, atomic force microscopy, field emission scanning electron micros…
We carried out ab initio calculations of the (InN)n∕(GaN)m short period superlattices using the LDA-1/2 method in order to obtain approximate quasiparticle electronic structures. We performed calculations for several short period superlattices respecting the concentrations of 33%, 50%, 66%, and 80% of InN, considering…
Abstract Nano TiO 2 embedded in diatomite (NTED) synthesis materials were prepared by a sol–gel method in absolute ethyl alcohol suspension. NTED synthesis materials have a higher specific surface area and larger pore volume using micromeritics ASAP 2020. The result of characterization was measured by X‐ray diffractio…
The separation of metal impurities from metallurgical grade silicon by a combination of slag treatment and acid leaching was investigated. Based on a detailed analysis of microstructure evolution in metallurgical grade silicon, the primary precipitated phase in silicon was tended to form Si-Ca system intermetallics af…
M2O2 (M = Sc, Y, and La) were synthesized in a pulsed laser-vaporization molecular beam source and studied by mass-analyzed threshold ionization (MATI) spectroscopy and ab initio calculations. Adiabatic ionization energies (AIEs) and several vibrational frequencies were measured accurately for the first time from the…
Adsorption of CO2, CH4, and N2 has been investigated using amine functionalized polymeric resins having diethanolamine, imidazole, dimethylamine, and N-methyl piperazine covalently attached to the styrene-divinyl benzene copolymer (PS) matrix. The equilibrium adsorption of CO2, CH4, and N2 was examined on these functi…