Extension of Gibbs Energy Data for Pure Elements to Zero KelvinTemperature
A method for the extension of validity of SGTE Gibbs energy expression to zero Kelvin temperature is described.
Materials Literature
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Trojramenné chromofory na bázi imidazolia
Byla provedena literární rešerše zaměřená na přípravu a využití imidazolia jako akceptorní jednotky push-pull chromoforů. Byly nalezeny dvě strategie syntéz vedoucích k těmto derivátům a obě byly experimentálně vyzkoušeny. Kvarternizací odpovídajícího imidazolu se podařilo připravit čtyři deriváty N,N dimethyl 1H imid…
Résistance à la corrosion des revêtementscomposites nickel-alumine sur différents substrats
Dans ce present travail, l'adherence et la resistance a la corrosion des revetements composites Ni-Al2O3 electrodeposes a partir d'un bain de nickel sulfate et d'un bain de nickel chlorure, sur differents substrats, ont ete etudiees. Le milieu agressif choisi est une solution de 3.5% NaCl. Deux techniques de caracteri…
Etude expérimentale sur la Fatigue des Matériaux en Flexion Rotative
Le but de cette these est de determiner le comportement des eprouvettes de metal (acier A60) sous sollicitations de contraintes periodiques a amplitude constante, analogue a celles qui se produisent dans la pratique lors des sollicitations de service. Le materiau teste etait : un acier a usage courant en mecanique gen…
Синтез и смешанная проводимость Ce 1 _ x _ y La x Pr y O 2 -5 для каталитически активных защитных подслоев твердооксидных топливных элементов
Developments of high-efficiency solid oxide fuel cells (SOFCs) make it necessary to create multilayered electrode systems providing both a superior electrochemical activity and stability in the entire range of SOFC operation conditions. This work summarizes experimental results on the functional properties of fluorite…
不同掺杂浓度Tm3+:LiLuF4单晶的1800nm荧光发射（英文）
采用坩埚下降法生长了Tm3+掺杂浓度为0.45%,0.90%,1.63%与3.25%(摩尔分数,x)的LiLuF4单晶.测试了样品的电感耦合等离子体原子发射光谱(ICP-AES)、X射线衍射(XRD)谱、吸收光谱(1400-2000 nm),并且分析比较了808 nm半导体激光器(LD)激发下荧光光谱.结果表明:当Tm3+的浓度从0.45%变化到3.25%时,1800 nm处的荧光强度呈现了先增后减的趋势,当掺杂浓度约为0.90%时达到最大值,而位于1470 nm处的荧光强度则呈现了相反的趋势.Tm3+:3F4能级的荧光衰减寿命随着掺杂浓度的增加不断减小.1800 nm处的这种荧光强度变化归结于Tm3+离子间的交叉驰豫效应(3H6…
Layered Structures in Deformed Metals and Alloys
Layered structures characterize metals and alloys deformed to high strain. The morphology is typical lamellar or fibrous and the interlamellar spacing can span several length scales down to the nanometer dimension. The layered structures can be observed in bulk or in surface regions, which is shown by the way of examp…
Структура и износостойкость многослойного карбидосодержащего покрытия после ацетиленокислородной наплавки
The paper is devoted to study of structure, mechanical properties and wear resistance of multilayer coating formed by oxyacetylene welding carbide-containing rods, powder material with nickel sublayer. The amount of wear depends on the structure of the deposited material and welding conditions.
Electrochemical Deposited Zinc Titanate Film on Mild steel Surface for Enhanced Corrosion Protection Characteristics
Zinc titanate particles were synthesized by using electrochemical techniques. The synthesized of zinc titanate was in-situ deposited on mild steel surfaces. The deposition of zinc titanate was confirmed by XRD analysis. The corrosion protection of mild steel with surface deposition of zinc titanate particles were eval…
Numerical FE study of hydrogen embrittlement
A 2D finite element model of a C(T) specimen is developed by a zero‐thickness layer of cohesive elements, to simulate crack propagation. Starting from an initial model without H, the embrittlement effect is simulated by modifying the traction‐separation law (TSL) of cohesive elements, according to relationships taking…
Структурные изменения в приповерхностных слоях палладия и сплавах палладий-водород, индуцированные водородом
Systematic research of structural changes in subsurface layers of palladium (99.98%) and palladium-hydrogen alloys, when saturating with hydrogen, are fulfilled. Experimental technique of optical microscopy and further computer analyses of registered processes are used. It is shown that a number of hydrogen elastic an…
Robust homoclinic orbits in planar systems with Preisach hysteresis operator
We construct examples of robust homoclinic orbits for systems of ordinary differential equations coupled with the Preisach hysteresis operator. Existence of such orbits is demonstrated for the first time. We discuss a generic mechanism that creates robust homoclinic orbits and a method for finding them. An example of…
Design of Continuous Reactor Systems for API Production
The pharmaceutical industry has experienced many changes over the last few decades. Continuous production has been promoted as one of the more promising methods for making the industry more efficient and sustainable. The primary focus of this thesis is on the performance of Grignard chemistry in continuous reactor set…
Syntéza a vlastnosti fosforečnanů dopovaných prvky vzácných zemin
Cílem této práce byla laboratorní příprava směsného pigmentu fosforečnanu zinečnatého a fosforečnanu lanthanitého či neodymitého v molárních poměrech 1,2:1; 2:1; 4,5:1 a 12:1. Reakce proběhla srážením příslušného oxidu lanthanoidu a uhličitanu zinečnatého v kyselině trihydrogenfosforečné. Čistota výchozích surovin byl…
Organic/hybrid nanoparticles and single-walled carbon nanotubes: Preparation methods and chiral applications
Nanoparticles are molecular-sized solids with at least one dimension measuring between 1–100 nm or 10–1000 nm depending on the individual discipline's perspective. They are aggregates of anywhere from a few hundreds to tens of thousands of atoms which render them larger than molecules but smaller than bulk solids. Con…
Etude de la corrélation entre les propriétés mécaniqueset la teneur en cuivre d’alliages Fe-Cu
Les applications de la technologie moderne requierent des materiaux de plus en plus performants en qualite de caracteristiques mecaniques, physiques et chimiques. Dans ce contexte, de nombreux chercheurs se sont atteles a trouver des proprietes recherchees en utilisant differentes techniques d’elaboration. Le frittage…
Theoretical aspects of WS(2) nanotube chemical unzipping
Theoretical analysis of experimental data on unzipping multilayered WS(2) nanotubes by consequent intercalation of lithium atoms and 1-octanethiol molecules [C. Nethravathi, et al., ACS Nano, 2013, 7, 7311] is presented. The radial expansion of the tube was described using continuum thin-walled cylinder approximation…
Controlling Electromagnetic Fields with Tensor Transmission-Line Metamaterials.
The advent of metamaterials and transformation electromagnetics have revolutionized the use of materials in the control of electromagnetic fields. Metamaterials enabled the control of material properties, and transformation electromagnetics provided a systematic procedure for designing these materials to achieve a spe…
SEM-EDS analysis of slip cast composite Al2O3-ZrO2 ceramics
In this paper, composite Al2O3–t-ZrO2 ceramics (composition: 95 wt. % Al2O3 – 5 wt. % t-ZrO2 and 90 wt. % Al2O3 – 10 wt. % t-ZrO2) was formed by slip casting in plaster mould. After drying, green bodies were sintered in laboratory electric kiln under air environment at a temperature of 1650 °C. Density of prepared sam…
Protective Effects of Aqueous Extract of Terminalia arjuna bark Against Doxorubicin-induced Cardiotoxicity
The bark of Terminalia arjuna (TA), a tropical tree, has been used in Ayurvedic medicine for treatment of cardiovascular disease. TA bark is known to contain various antioxidants, and recently it has been suggested to enhance function of the normal heart as an over-the-counter supplement in the USA. The mechanism unde…