Materials Literature
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The results from studying the nanostructural states formed upon ion irradiation in subsurface volumes of pure metals (Pt) are presented. The formation of a nanocrystalline structure with block sizes of 1–5 nm are observed at a distance of no less than 20 nm from the irradiated surface. It is shown that block boundarie…
In this study a concept of an electrolyzer operating in rather aggressive solutions (and potentially salt water) and with the potential of monolithic integration with a solar cell structure has been presented. The electrolyzer structure is based on a metal dot modified CVD diamond electrode structure grown by HFCVD, a…
With increasing of the speed of the train, the requirement of the performance of the braking friction materials is more and more higher. It is urgent to find new braking materials to satisfy the rigorous using environment. Cf/SiC has the broad application prospects when it is used as a new kind of braking material. On…
PURPOSE: ) per dose were exposed to x-rays of 50 kV, 80 kV, 120 kV and 60Co gamma rays from a Leksell Gamma Knife at dose values from 50 mGy to 100 Gy. The x-ray beams were calibrated following the AAPMTG-61 protocol using ionization chambers calibrated at NIST or Wisconsin University depending on the beam quality, wh…
Abstract Fast response time is the most attractive feature of polymer‐stabilized blue phase liquid crystals (PS‐BPLCs). We have investigated the response time of a PS‐BPLC under various electric fields and proposed a double‐relaxation model to explain the possible mechanisms. These results will guide the future device…
The results of studying the influence of the heat treatment conditions on the structure and properties of new nanostructured steel with 8–10% Cr designed for heat power units with supercritical parameters are presented.
A multiple non-phosphorus corrosion inhibitor was prepared by mixing polyaspartic acid with itaconic acid homopolymer, sodium gluconate and surfactant alkylolamide in a certain proportion. The corrosion inhibition performance was tested and the mechanism was studied by electrochemical process. The results showed that…
The concept of optical path length enhancement is a useful tool for characterizing the effects of light trapping in thin films by providing a convenient geometrical interpretation of energy absorption. However, path length calculations cannot distinguish between absorption gains due to better antireflection versus abs…
The field enhanced Raman scattering of crystal violet (CV) molecules, excited by localized electromagnetic field of silver (Ag) nano-particles, is elucidated. In the study, a SiO2buffer layer with a gradient thickness is employed to prevent the electron-transfer from the Ag nano-particles to the CV molecules. Using a…
The effect of Co substitution for Be on the glass-forming ability and mechanical properties was investigated in Ti35Zr30Be27.5-xCu7.5Cox (x=0, 3.5, 7.5, 11.5 at.%) alloys by using X-ray diffractometry (XRD), differential scanning calorimetry (DSC), high-resolution transmission electron microscopy (HRTEM) and compressi…
The Senegalese Authority for Radiation protection and Nuclear Safety (ARSN), placed under the supervision of the Prime Minister, was setting up by the Law 2009‐14 relating to nuclear security and to radiation protection which repeals and replaces the opposite measures of the Law 2004‐17 relating to protection against…
Hipot testing is always used as a factory or commissioning test to ensure that the groundwall insulation in new stator windings and wound rotor windings is fit for service. Maintenance hipot testing is also used by some motor and generator owners to periodically ensure that the insulation in windings that have been in…
In this work, titanium films , 500nm thick, are rf sputtered onto glass substrates held at 500°C. The resulting films are then anodized at a constant potential in an electrolyte using a platinum counter electrode. Ti films were synthesized by RF magnetron sputtering on glass substrates. The anodizaton process resulted…
The properties of green sheet were investigated in order to understanding an effects of organic solvent mixture ratio for solid oxide fuel cells fabrication, The purpose of this work is to optimize the slurry condition using the design of experiment to improve green sheet properties. The elongation increased with incr…
α-Si3N4possesses excellent sintering activity, which is used to prepare high performance Si3N4-based ceramics and composite refractory. Si3N4powder is always synthesized by nitriding silicon in controlled-atmosphere furnace whose furnace volume is very small(effective volume: 1840×1420×1660mm), the extreme reaction h…
Barium ferrites hollow microspheres were prepared by self-propagating high-temperature synthesis self-reactive flame spraying method. The droplets enter in the cooling medium and solidified rapidly so that the gas can not escape to remain holes inside the products. The powder samples were used for characterization. Th…
$Co_3O_4$ , $Al_2O_3$ and $Co_3O_4$ / $Al_2O_3$ mesoporous powders were prepared by a sol-gel method with starting matierals of aluminum isopropoxide and cobalt (II) nitrate. A P123 template is employed as an active organic additive for improving the specific surface area of the mixed oxide by forming surfactant micel…
This paper investigates a three-dimensional finite element model for the cross-wedge rolling process has been used to characterize the workpiece material stress and deformation behavior. Considering the characteristic of cross wedge rolling, the static implicit FEM program is selected. To simulate all forming stages i…
PURPOSE: The purpose of this study was to measure depth dose curves and dose effects near high-Z interfaces with radiochromic EBT-2 films reaching a spatial resolution superior to conventional methods with no quality losses. METHODS: The setup is made of two 12cm stacks of RW3, fixing an EBT2 film in a vertical positi…
PURPOSE: The purpose of this study was to investigate influence of different scanning speeds on measurements of photon beam flatness and symmetry. METHODS: , IBA-Dosimetry) at depths of maximum dose, 5,10, and 20cm, for 10×10 cm field size. For each scanning speed and depth, measurements were repeated five times to gi…