Materials Literature
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The main objective of this work was to extend the techniques of shock‐wave testing of brittle materials upon divergent loading conditions in order to vary the relationship between longitudinal and transversal stresses and to obtain experimental information about the conditions of the compressive fracture thresholds. E…
Se sintetizaron hidróxido de circonio puro y modificado con un 15% de iones borato. Ambos se calcinaron en atmósfera dinámica de aire durante 3 h a 400, 500 y 600ºC. Los soportes se caracterizaron mediante fisisorción de nitrógeno, espectroscopía infrarroja, titulación potenciométrica con n-butilamina y deshidratación…
The influence of temperature on the deformation and failure behavior of AZ80 wrought Mg alloy has been examined from 77K to 298K. It is found that the yield strength (YS) and ultimate strength (UTS) are increasing with the temperature decreasing, while the elongation is decreasing especial between 213K and 143K. Based…
The GeO-B2O3-Na2O (GBNB)，GeO2-Al2O3-Na2O(GANB), GeO2-Al2O3-BaO(GABB)and GeO2-Al2O3-Y2O3(GAYB) glasses doped with bismuth of 1mol% concentration were prepared by melting method and measurement of their DTA curves, absorption and emission spectra and fluorescence decay curves were carried out. It was found that the abso…
Influence of low molecular weight polybutadiene (liquid PB) treated with maleic anhydride on properties of a silica-filled SBR compounds was studied. Silica dispersion was improved by adding liquid PB. The liquid PB treated with maleic anhydride (liquid MAPB) was found to be more effective for the improvement of silic…
Nanoparticles of tin-doped ferrites SnxFe3-xO4(x=0, 0.1, 0.2, 0.3, 0.4, 1.0) were prepared by the precipitation exchange method. The particles of all specimens are crystalline with mean diameter in the range of 4-8 nm, and the lattice parameters enlarge with increasing tin content. Magnetization and Mssbauer data ind…
Minerals of the tobermorite group with double [Al3++Na+] substitutions were synthesized using both, non-ground raw mineral mixtures and mixtures ground in a colloidal mill. The synthesis of calcium sili-cate hydrate is more effective when dry primary mixtures ground in a colloidal mill are taken, because compositions…
From crystallographic point of view, Al<sub>4</sub>Si C<sub>4</sub> can be described as Al<sub>4</sub> C<sub>3</sub> -type and hexagonal SiC-type structural units alternatively stacked along [0001] direction. However, relationship between this layered crystal structure a…
The effects of the thicknesses of a Cu/Ti underlayer and a Sm-Co layer on the magnetic properties and domain structure of SmCo5 perpendicular magnetization films prepared by using an ultra-high-vacuum sputtering system were investigated. By adjusting the thicknesses of both the Cu/Ti underlayer and the Sm-Co layer, th…
Increasing the working frequency can reduce the size of the magnetic component, however, the high frequency eddy effects including skin and proximity effects raise the winding losses. Based on one-dimensional model for windings of magnetic components, the eddy effects in planar magnetic components are analyzed. By uti…
Nanoparticles as lubricating additive possess excellent tribological properties. Many researchers have used nanodiamond as a new type lubricating additive due to its double performances of both diamond and nano-material.The key problem is the surface modification of nanodiamond aggregates to achieve the deaggregation…
Borazine derivatives were reacted with divinyldisilazane via hydroboration reactions. The synthe- sized liquid polymer with a ca. 70 % ceramic yield changed to an insoluble solid after crosslinking reactions of the unreacted vinyl groups to the B-C alkyl bridges between the borazine ring and vinylsilazane as post-heat…
Transformer failure is usually triggered by external events such as lightning strikes, switching transients, or short circuits. However, susceptibility to these events is usually due to some incipient weakness in the insulation system, which may be detected at an earlier stage by monitoring partial discharge activitie…
This paper described the production of a novel biosynthetic material using the manufacturing technique of electro spinning for the construction of scaffold for organ replacement. This electrostatic technique uses an electric field to control the deposition of polymer fibres onto a specific substrate to fabricate fibro…
Foam generation plays a crucial role in foam processes for improved oil recovery, acid diversion and environmental remediation. This study extends previous work to layered media, the effect of surfactant concentration, and injection strategy, including alternating-slug (SAG) injection and pulsed injection rate and pre…
Annealing effects on the elastic behavior of sphere-forming polystyrene-block-polyisoprene-block-polystyrene (SIS) and polystyrene-block-polyisoprene-block-poly(2-vinylpyridine) (SIP), annealed in a cone-plate attached to a rheometer at 150 °C with and without additional shear, are examined by dynamic mechanical analy…
We demonstrate a direction controllable linearly polarized laser from a dye-doped cholesteric liquid crystal (CLC) in a homogeneous cell coated with a metallic mirror on the inner side of a glass substrate. Due to coherent superposition of two orthogonal polarization states, the output laser light becomes linearly pol…
Characteristics of hydrogen permeation in the stainless steel 304 modified by either facing, ion sputtering, carbon coating or annealing were investigated in order to establish the safe hydrogen-energy-infrastructure using welding. A stationary hydrogen flux from the stainless steel surface was measured by using a sys…
A fundamentally new procedure was proposed for evaluating the parameters of plasticizer desorption from flexible-PVC compounds by quantitative description in terms of a developed kinetic model and of TGA data obtained under the conditions of a linear rise in temperature up to the onset of chemical transformation. The…
Multilayer thin films were prepared on the surface of a gold (Au) electrode using sodium carboxymethylcellulose (CMC) to elucidate the suitability of the polysaccharide-based thin film as a scaffold for constructing chemical sensors. A quartz crystal microbalance study revealed that an alternate deposition of CMC and…