Materials Literature
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Various manganese oxide nanorods with similar one-dimensional morphology were prepared by calcination of MnOOH nanorods under different gas atmosphere and at different temperatures, which were synthesized by a hydrothermal route. The morphology and structure of MnOx catalysts were characterized by a series of techniqu…
The UK's National Physical Laboratory (NPL) has developed a range of advanced in situ diagnostic techniques to support research into mitigation strategies for critical PEM fuel cell (PEMFC) degradation mechanisms. Recent innovations include a new reference electrode configuration that for the first time allows mapping…
Abstract Austenitization refers to heating into the austenite phase field, during which the austenite structure is formed. This article highlights the purpose of austenitization, and reviews the mechanism and importance of thermodynamics and kinetics of austenite structure using an iron-carbon binary phase diagram. It…
A Passat diesel car is fuelled with 0%, 10%, 20% coal-to-liquid fuel and diesel blends. The emission characteristics of each fuel on NEDC test cycle are studied by Engine Exhaust Particle Sizer(EEPS) and running drum tester. The result shows that, when blended with coal-to-liquid fuel, the peak of particle number conc…
그린란드 남서부 티키우사크(Tikiusaaq) 카보나타이트 복합체와 케쿼르삭(Qaqarssuk) 카보나타이트 복합체가 산출되는 지역을 2주간 야외조사 한 결과와 대표적인 시료에 대한 암석기재학적 관찰을 통해 얻은 결과에 대해 보고하고자 한다. 터키우사크 카보나타이트 복합체내의 방해석 카보나타이트는 희토류원소를 다량 포함하는 스트론티아나이트와 앤시라이트 탄산염광물을 배태한다. 주사전자현미경에 부착된 X-선 분광 분석결과스트론티아나이트에서는 세륨이, 앤시라이트에서는 란탄, 세륨, 네오디뮴이 상당량 검출되었다. 퀘커르삭 카보나타이트에서는 희토류탄산염 광물 대신 바륨을 함…
Although installing offshore pipelines by reel-laying method is eases and cost-effective, still conceal some of plastic deformation into the pipeline which may, in combination with ageing, affect strength and ductility of the pipe material. Therefore, reeling pipelines that internally pressurized is addressed in this…
Abstract This article commences with a description of the principles of induction heating followed by a discussion on the high temperature electrical, magnetic, and thermal properties of steel, which influence the performance of induction heaters. The importance of eddy current distribution in a workpiece is explained…
The energy band structures of AnSn 3 (An=Th, U, Np, and Pu) are investigated by using a relativistic linear augmented plane wave method with the exchange-correlation potential in the local density approximation. The energy bands near the Fermi level are mainly caused by the hybridization between the 5 f and Sn 5 p ele…
Abstract Because of the exponential increase of computational resource requirement for numerical field simulations of more and more complex physical phenomena and more and more complex large problems in science and engineering practice, parallel processing appears to be an essential tool to handle the resulting large-…
This paper proposes a novel analytical model of air-gap eccentricity in induction motors (IMs) by allowing teeth saturation due to the local air-gap over-fluxing to be taken into account. The approach takes into account the magnetic saturation by means of a fictive permeance variation while supposing that, under air-g…
After reviewing some theoretical facts and early theories, this work presents a study of the dielectric properties of carbon black (Raven 7000) dispersions in an insulating epoxy matrix (diglycidylic ether of bisphe-nol F) in the frequency range 1kHz to 15MHz. In an earlier study,[ 1 El Bouazzaoui , S. ; Achour , M. E…
In this paper, the wear performance of polymer radial ball bearings (PEEK-PTFE and PPS-PTFE) were investigated. For effective operation of equipment in clean energy facilities environment, the polymer bearings were developed. These polymer bearings were produced by machining and their rolling contact fatigue (RCF) beh…
This study investigates the effect of nano-scale ITO cone gratings on the light extraction efficiency of GaN LEDs using FDTD analysis. First, we show the existence of a standing wave interference pattern in the region between the MQW layer and the LED surface for the non-grating cases. Then we use this knowledge to de…
Nowadays power quality problem is a very important issue in power sector and various methods are developed to mitigate them. Shunt active power filter (APF) is used for current harmonics compensation. Synchronous Reference Frame theory is used for control of Shunt APF. In case of Voltage Source Inverter (VSI) based Sh…
Abstract This article, with the aid of illustrations and curves, describes an experiment used to understand the cooling characteristics and transformation behavior of steel wires during patenting. The two aqueous polymer quenchants used as alternatives for lead baths, are carboxymethyl cellulose and polyvinyl alcohol.…
One of the brightest tested triboluminescent materials is europium dibenzoylmethide triethylammonium (EuD4TEA). In 2011, the authors discovered that synthesizing EuD4TEA using europium nitrate instead of chloride significantly increased the triboluminescence yield. In 2012, the authors discovered that anhydrous ethano…
The electrical resistivity, thermal conductivity, and thermopower have been measured for a large number of newly synthesized metallic compounds and alloys of simple, transition, and rare-earth elements. The maximum room-temperature values of the thermoelectric figure of merit ZT for the presented systems are about 7%.…
Three-dimensional (3D) integration is considered to be a promising technology to tackle the global interconnect scaling problem for tera-scale integrated circuits (ICs). 3D ICs typically employ through-silicon-vias (TSVs) to connect planar circuits vertically. Due to its immature fabrication process, several defects s…
The startup phase of a tokamak is a complex phenomenon involving burnthrough of the low-Z impurities and rampup of Ip, the plasma current. The design considerations of a tokamak are closely connected with the startup modeling. Plasma evolution is analysed using a zero-dimensional model. The particle and energy balance…
In this work, a hybrid finite element volume FEV method is further extended to simulate soot nanoparticles formation and oxidation in a heavily sooting co-flow methane diffusion flame at elevated pressure. In this regard, two-equation soot model is used and soot oxidation due to O2is further taken into account. Consid…