Materials Literature
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This contribution introduces a thermodynamically consistent, fully electro-mechanically coupled micro-mechanical model for ferroelectric materials. Adopting a phase field concept, in which the spontaneous polarization is used as order parameter, a Ginzburg-Landau type theory is formulated for the evolution of the orde…
The characteristics of chloride removal from simulated cast iron artefacts by electrochemical methods were studied. The effects of current and potential on chloride removal were investigated in both galvanostatic and potentiostatic modes. The composition of the rusts before and after treatment were analysed by X-ray d…
Vanadium pentaoxide micro-nano structures are grown on , , molybdenum (Mo), and fused silica (FS) substrates using direct vapor phase technique and studied using scanning electron and atomic force microscopy. The shape and size of micro-nano structures depend on the substrate. Belt-shaped structures formed on the subs…
This research used pulse and direct current methods to perform surface anodizing treatment of Mg-9 mass%Li-1 mass%Zn alloy (LZ91). The anodic films were analyzed with electrochemical impedance spectroscopy (EIS) for corrosion resistance. The impedance measurements show that the resistance value of anodic films made by…
The demand for paper yarn has increased as a textile fabric because of its light weight and low static electricity. However, paper yarn wrinkles easily and its softness and stretching properties are low. So we attempted to improve the stretching property of paper yarn by the high-pressure steam method which could prov…
The corrosion behavior of both tin-plated carbon steel and aluminum (Al 1100) in NaCl solutions were studied using electrochemical impedance spectroscopy (EIS). The study objectives were to compare their corrosion behavior in concentrated brine solution, establish the equivalent electrical circuit diagrams of their co…
Bulk metallic glasses have interesting combination of physical, chemical, mechanical, and magnetic properties which make them attractive for a variety of applications. Consequently there has been a lot of interest in understanding the structure and properties of these materials. More varied applications can be sought…
The Al 0.016 Zn 0.984 O (AZO) and Al 0.016 In 0.003 Zn 0.981 O (AIZO) thin films were grown on Corning 1737 glass substrates by pulsed laser deposition and they were investigated for the structural, electrical, and optical properties as a function of deposition temperature. The crystallinity of the films increases wit…
The paper presents conception and production method of skeleton composite castings with use of cast steel G35CrSiMnMoNi skeleton casting and chromium cast iron EN-GJN-XCr15 filling. Working elements in winning machines and devices, which work in intensive aberasive wear i.e. liner of exhausters, percussive and ram ham…
In the structural genomics period traditional methods for protein crystallization have been eclipsed by automation using batch or vapor diffusion equilibration to find conditions conducive for protein crystal growth. Although many globular and soluble proteins predominantly from prokaryotes have been crystallized and…
Nanostructured materials are receiving increased attention from both academia and industry. For example, the fundamental understanding of fiber formation by peptides and proteins both is of interest in itself and may lead to a range of applications. A key idea here is that the folding and subsequent supramolecular ass…
Chromites, titanates and Pt-YSZ-CeO2 cermets have been investigated as potential electrode materials for an alternative concept of Solid Oxide Fuel Cell (SOFC), the symmetrical SOFCs (SFC). In this configuration, the same electrode material is used simultaneously as anode and cathode. \nInterconnector materials, s…
Abstract A Nuclear quadrupole resonance detector has been developed. This detector targets to RDX, a high explosive inside an anti-personnel landmine, buried up to 15 cm deep. This detector works well outside an electromagnetically shielded room. It was also mounted an anti-mine vehicle and remotely controlled mine de…
Surface-enhanced Raman spectroscopy (SERS) allows single-molecule detection due to the strong field localization occurring at sharp bends or kinks of the metal-vacuum interface. An important question concerns the limits of the signal enhancement that can be achieved via a judicious design of the surface. By using a sp…
The paper presents studies of the influence of substrate type and its placement on structural properties of TiO2 thin films prepared by the high energy reactive magnetron sputtering method. During the deposition, conditions of the magnetron powering have been especially selected to enhance the nucleation energy. Thin…
On the basis of the 120 x 120 complete energy matrix, the local lattice structures of the octahedral (CrO6)9- clusters for Cr3+ ions doping in a variety of oxide crystals with D3d or C3v site symmetry have been studied by employing two distorted parameters, respectively. By simulating the calculated EPR and optical sp…
We briefly report pressure dependence of electrical resistivity in fluorine-free, oxygen- deficient, NdFeAsO 1- y (1- y = 0.85, 0.8, and 0.6, nominal compositions) under hydrostatic high pressure up to 18 GPa. Superconducting temperatures, T C decrease in every composition by applying pressure. In NdFeAsO 0.85 , which…
By performing first-principles electronic structure and transport calculations, we have demonstrated the electronic structure and transport properties of single layer zigzag graphene nanoribbons with armchair edges and the effect of edge-vacancy defects. It is shown that perfect zigzag graphene nanoribbons are semicon…
The negative charging process and its mechanism caused by low-energy electron beam (e-beam) irradiation have been clarified for an insulating thin film with a grounded conductive substrate. Numerical simulation is performed by considering both electron scattering and electron transport, in combination with the Monte C…
LaFe 1- y Co y AsO 1- x F x ( x =0.11) with various y values were prepared and their electrical resistivities, superconducting diamagnetisms and Hall coefficients have been measured. 75 As- and 135 La-NMR studies have also been carried out In spite of the successful Co-doping, we have not found any meaningful correlat…