Materials Literature
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A transformation electromagnetics-based approach is presented to facilitate the use of fixed Cartesian grids for modeling arbitrarily shaped (convex or nonconvex) curved boundaries in finite methods. The basic idea is to design transformation media adapted to the Cartesian grid by using the duality between the materia…
A theoretical study of poly furfuryle alcohol (PFA), rhodamine B (Rh B) dye and their blends (PFA-Rh B) is carried out by using the density functional theory (DFT). Electronic states and opto-electronic properties are investigated. The electronic states indicate that the oligomers of FA are insulators and Rh B is a wi…
Ti-Zr-Cu-Ni amorphous filler with good performance is suitable for joining TC and TB titanium alloy, but its melting temperature is higher than 882.5°C, the α→β phase transition temperature of TA2, which makes the ductility of TA2 fall and the microstructure of the joint coarse. In this paper, Ti-Zr-Cu-Ni amorphous fi…
In this paper we report the detection of explosive compounds using a miniaturized gas preconcentrator (μGP) made of porous silicon (PS) filled in with Carbopack B as an adsorbent material. The μGP includes also a platinum heater patterned at the backside and fluidic connectors sealed on the glass cover. Our μGP is des…
Micro-structural aspects of thermal cyclic performance at 600 °C and 700 °C of thermal barrier coatings systems on aluminium alloy 2024 have been reported. The extent of cracking was observed in the coatings surface with the increase of temperatures. Presence of cracks through-thickness of the specimens in the coating…
This paper presents corrosion and wear behavior of the plasma-nitrided 32CrMoV13 steel.
Testing methods for mechanical properties of structural materials at cryogenic temperatures had been developed rapidly after 1980, however, until 1985 many researches on cryogenic structural materials have been reported using their own methods and new materials have been developed for ITER. Since 1986, a series of int…
OBJECTIVE: To determine the safety and efficacy of long-term use of mizoribine by undertaking a 3-year post-marketing surveillance study. METHODS: Subjects were all lupus nephritis patients newly treated with mizoribine between 1 October 2003 and 30 September 2005 at contracted study sites. RESULTS: Mizoribine was adm…
For the properties of polymer are relative to its structure, the main purpose of the present work is to investigate the mechanical properties of the aeronautical PMMA which has been treated by the directional tensile technology. Isodyne images reveal the stress state in directional PMMA. And then, an anisotropic mecha…
ZnO nanoarchitecture-based nano- and microdevices came into the focus due to their multifunctional operation. In this work, we summarize cost-effective procedures to grow ZnO nano- and microstructures, namely hydrothermal growth and electrochemical deposition. These techniques allow the controllable growth of ZnO nano…
Highly dispersed and homogeneous titanium dioxide (TiO2) nanoparticles were synthesized by a solvothermal method with polymer gel. Polymer gel is essential for the highly dispersed and homogeneous nanoparticles. First, polyvinyl alcohol (PVA) was dissolved in water at 70°C and cooled to room temperature. Ammonium citr…
In this work, we demonstrate an improved 3-D distributed circuit model to analyze the luminescent coupling effects in multijunction concentrator solar cells. We implemented the 3-D distributed circuit model and compared the simulation results with experimental data measured on GaAs/GaInNAsSb solar cells. The results f…
Pd Seeding with the Sonochemical Method for Application of Cu Electroless Deposition to Cu Metallization, Lim, Taeho, Kim, Kwang Hwan, Kim, Kanghoon, Lee, Hyunjoon, Kim, Hyun-Jong, Lee, Ho-Nyun, Kim, Jae Jeong, Kwon, Oh Joong
Abstract The oxidation behaviour of 20MnMoNi55 and AISI 304 Steel in Salt solution of 75wt.%Na 2 SO 4 +25wt.%K 2 SO 4 has been studied at a temperature of 900 °C under cyclic condition. Thermogravimetric technique has been used to know the corrosion kinetics of 20MnMoNi55 steel and AISI 304 steel in salt at 900 °C und…
Laser Firing Contact (LFC) and Laser Doping (LD) have become potential alternatives to the Al BSF thermal processing conventionally used in p-type c-Si solar cell rear contacts. Optimized LFC and LD processes allow, not only the generation of efficient micro-contacts, but also the diffusion of p-type doping impurities…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. Sethupathy, V. Sethuraman, J. Anandha Raj, P. Muthuraja, P. Manisankar; Electrospun polyethyle…
The electrochemical behavior of coarse-grained and nanostructured titanium in various media is studied by the methods of potentiodynamic polarization and impedance spectroscopy and by the analysis of the etching curves. It is found that the dissolution rate of nanostructured titanium increases in a Ringer-Locke soluti…
This work is concerned with numerical simulations of surface roughening in a polycrystalline aluminum alloy. Using 3D finite difference model, high-resolution simulations are conducted. Effects of loading conditions and grain size on surface roughening and mesoscale deformation processes in AL6061-T3 aluminum alloy un…
Typical engineering metals exhibit a change of the failure mechanism with decreasing temperature. In the range of room temperature a ductile mechanism is observed. Thereby, voids nucleate, grow by plastic deformations of the surrounding matrix and finally the voids coalesce. In contrast in the low temperature regime,…
The National Nuclear Research Institute of the Ghana Atomic Energy Commission is undertaking steps to convert the Ghana Research Reactor-1 from HEU Core to LEU. The proposed LEU core consists of 12.5% enriched UO2 fuel elements clad in Zircaloy-4 alloy. This is done in collaboration with Reduced Enrichment for Researc…