Materials Literature
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An experimental study of indentation size effect (ISE) on HfO2-SiO2 multilayer thin films is presented. Decrease in hardness with increasing loads is observed using cube corner tip. Data is discussed using the model of Nix-Gao.
Zusammenfassung Thermoelektrische Bauteile zur Erzeugung von elektrischer Energie aus Verlustwärme lassen sich mittels Halbleitertechnologien extrem miniaturiesieren. Mithilfe eines waferbasierten, MEMS-ähnlichen Herstellungsprozesses können Bauteile mit Gesamtdicken zwischen 0,5 mm und 1 mm sowie Grundflächen von wen…
In the framework of the periodic Anderson model in the limit of strong electron correlations a theory of s -wave superconductivity (this phase has been recently discovered in the skutterudite LaFe 4 P 12 ) has been developed. The theory is based on kinematic mechanism, provided that the spin fluctuation processes (SFP…
A series of [Cu(tCu)/Co(25 Å)]25 multilayers at higher spacer layer thickness have been deposited by dc magnetron sputtering. Magnetoresistance (MR) measurements have been carried out at different temperatures. MR curves showed hysteresis by displaying peaks at magnetic field Hp. The field values exhibiting the maximu…
Silver nanorod arrays with the thicknesses of 200±5 nm and 300±5 nm are deposited using glancing angle deposition (GLAD) technique. The transmission and the reflection coefficients of silver films for p- and s-polarized lights are measured at the wavelength of 639 nm by walk-off and polarization interferometers. Due t…
Nonlinear optical properties of gold nanoparticles (NPs) were studied using the degenerate electron gas model. Influence of the size and laser intensity on the third order susceptibility was analyzed around the plasmon resonance.
In this paper, pulsed Nd:YAG laser welding of 321 austenitic stainless steel and 630 (17-4PH) precipitation hardening martensitic stainless steel is being studied. The joints had a circular geometry and butt welded. Studies were focused on the effects of laser power, welding velocity, beam diameter and pulse duration…
Coke drums are thin-walled pressure vessels that experience severe thermal cycling condition which consists of heating, filling and rapidly cooling the drum in a short period of time. After some years under operation, cracks at the vessel may occur, especially at high stress concentration areas such as the skirt suppo…
In this paper an evaluation is made, by means of quantitative fractography and image analysis techniques, of the hydrogen-assisted micro-damage in axisymmetric notched samples of 316L austenitic stainless steel subjected to hydrogen embrittlement tests. Such a micro-damage created by hydrogen is concentrated in a exte…
Ultrafast measurements of few-layer epitaxial graphene are reported along with its equilibrium optical conductivity. We observe transient THz electrodynamics consistent with photoexcited holes in a dense Dirac electron plasma, which recombine on a picosecond timescale.
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 Andrei Andryieuski, Christoph Menzel, Carsten Rockstuhl, Radu Malureanu, Falk Lederer, Andrei V.…
The optimum dose can be produced by measuring and analysis of the dose distribution from the source. The energy of the source must be maximum for the target cell, and must minimum for the tissues that surround the target cell. In this study, the phantom model has a cylindrical shape with 20 cm radius and 19 cm depth.…
Femtosecond lasers enable materials processing with their notably characteristics, such as precision, high peak density, flexible, and minor thermal affected zone. Applications ranging from high precision micromachining to biological manipulation with no thermal damages are possibly executed via this technology. In th…
Oxide monolayers and submonolayers formed by vapor deposition of In 2 O and SiO oxides on In As ( 001 ) - ( 4 × 2 ) were studied by scanning tunneling microscopy. At low coverage, In 2 O molecules bond to the edges of the rows and most likely form new In–As bonds to the surface without any disruption of the clean surf…
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 Patrice Donfack, Animesh K. Ojha, Arnulf Materny; Critical Concentration Dependent SERS of Glycin…
Bismuth ferrite (BiFeO3) is an attractive multiferroic material. However, its application as a ferroelectric material in electronic devices is limited by large leakage current. In this letter, a bipolar resistance switching phenomenon was observed in BiFeO3polycrystalline films prepared by sol-gel method. The resistan…
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High-speed permanent magnetic generator (HSPMG) is common and important power production equipment in distributed generation systems. According to the structure characteristics of a 100kW level HSPMG, the mathematical model and physical models for its two-dimensional electromagnetic and thermal analyses are establishe…
A new type of 3,3'-(2-hydroxypropane-1,3-diyl) bis(azan-1-yl-1-ylidene)bis(2-(4-alkoxy phenyl)prop-1-en-1-ol) and their copper complexes were prepared and mesomorphic properties characterized. The mesomorphic properties of these copper complexes were studied by differential scanning calorimetry (DSC), polarized optica…
In recent years, there has been an increased demand for engineered materials that are lightweight, stiff and tough. Interpenetrating Phase Composites (IPC), a family of bio-inspired materials, made of two or more phases where each phase forms a continuous 3-D network throughout the volume of the material could address…