Materials Literature
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Ce travail de these porte sur la synthese de materiaux a base de pentoxyde de niobium et de nanotubes de carbone pour des applications en limitation optique. L’utilisation croissante de sources laser notamment dans le domaine militaire a rendu necessaire la mise au point d’une protection pour les dispositifs optiques…
Keywords: Dangling bond defects ; Germanium ; Silicon ; hybrid density functional theory ; charge transition levels ; Interface ; Traps Reference CSEA-CONF-2009-006View record in Web of Science Record created on 2009-10-14, modified on 2017-05-12
The paper examines the potential for the indigenous design and manufacture of laboratory equipment used for demonstrating the engineering principles of taught courses in our Engineering Schools. Using the Demonstration Journal Bearing as a case-study it is shown that imaginative modifications to classical design could…
A numerical study is presented where the impact of simultaneous thermal and mechanical loading on a railway wheel tread, as imposed by braking and rolling contact, is reported. A comparison is made of two-dimensional (2D) and 3D finite-element simulations of the thermomechanical problem featuring a material model that…
We produce the results of the experimental researches of solving the problem of acoustic transducer calibration. The following methods are presented in the work-graduation of rocket engine burn through, explosion of the standard charge with the use of air percussive tube, shots of artillery piece
The conference theme was "From Cast-Iron to Green Design: \nA Closer Look at Materials & Craft \nin the Pacific Northwest."
In der Arbeit wurden bekannte Verfahren zur nasschemischen Präparation der H-terminierten Si(111)-Oberfläche und zur Präparation der Si(111)-7x7-Rekonstruktion im Ultrahochvakuum erfolgreich reproduziert. Eine Precursorlösung wurde über die Applikationsmethoden "drop-cast", "dip-coating" und "liquid-injection-precurso…
The investigation on the interaction of superparamagnetic nanoparticles with cell membranes was divided into three phases: the synthesis and characterization of the magnetic and structural properties, surface functionalization of the particles, and ferrofluid studies of the particles in the presence of a slowly varyin…
Different ionic liquids containing the cation such as 1-N-butyl-3-methylimida-zolium (Bmim+) are able to efficiently dissolve cellulose. The ability of ionic liquids to truly dissolve cellulose is ...
This master’s thesis explores how to minimize the long-lived actinide waste that is produced in nuclear power plants by performing simulations of thoriated nuclear fuels in existing reactor designs.\nAn European pressurized water reactor (EPR) assembly fueled with a mixture of thorium and highly enriched uranium (20%…
Glycolysis has been generally accepted to be the source of reducing power used for the synthesis of polyhydroxyalkanoates (PHAs) in the anaerobic metabolism of polyphosphate accumulating organisms (PAOs). However, the tricarboxylic acid cycle (TCA) has also been suggested to contribute to the generation of reducing eq…
УДК 669.04 ТЕПЛОТЕХНИЧЕСКОЕ И ЭКОНОМИЧЕСКОЕ ОБОСНОВАНИЕ ВЫБОРА ОПТИМАЛЬНОЙ ТЕМПЕРАТУРЫ НАГРЕВА ВОЗДУХА В РЕКУПЕРАТОРАХ НАГРЕВАТЕЛЬНЫХ ПРОХОДНЫХ ПЕЧЕЙ МАШИНОСТРОИТЕЛЬНЫХ ПРЕДПРИЯТИЙ Доктора техн.наук, профессора ТИМОШПОЛЬСКИЙ В. И., ТРУСОВА И. А., асп.МЕНДЕЛЕВ Д. В., канд.физ.-мат.наук ГЕРМАН М
The square flat plates, are in general elements in the structures of civil and industrial constructions, their actual shape and support mode being imposed by different conditions in the exploitation of the buildings, such as the lay-out of some technological appliances, pipe crossing, embrasures in the stairs and so o…
TiC-Ti3SiC2 composites having the microstructure of fine Ti3SiC2 grains dispersed in TiC matrix were synthesized by two processes, that is, mechanical alloying of a powder blend of Ti, Si and C followed by hot-pressing (MA-HP process) and hot-pressing of a powder blend of Ti, Si and TiC (MIX-HP process). The microstru…
Several homogenized models are compared for accurate representation of ac magnetic properties of silicon steel sheets. Two of them are generalized Pry and Bean models that have a parameter for the frequency dependence of eddy-current loss. The third model assumes a quadratic distribution of magnetic flux density along…
In High-Cycle Fatigue (HCF) of materials like copper, the most common failure modes originate from cyclic strain localization in persistent slip bands (PSBs). The latter form only when the loading amplitudes exceed the PSB thresholds. In contrast to this well-known HCF behaviour, it is shown in the present study that…
Fracture mechanics based techniques can be used to study the phenomena of stress corrosion cracking and hydrogen embrittlement and to model the degradation of metallic materials caused by the uptake of atomic hydrogen. Constant extension rate tensile experiments were performed on both smooth and pre-cracked specimens…
The 7XXX series Al – Zn alloys are precipitation hardenable and therefore amenable for thermomechanical treatment. Al alloys with trace elements are used in aerospace industries inspite of the drawbacks of susceptibility to stress corrosion, poor wettability, poor weldability and poor fatigue resistance. The wettabili…
The stability and interfacial bonding of coincidence tilt and twist grain boundaries (GBs) in Al and Cu have been examined by using the projector-augmented wave method within the density-functional theory. For the {221} Σ=9 tilt GB, glide models are more stable than mirror models for Al and Cu, and the {001} Σ=5 twist…
Sticky point temperature (Ts) measurement for hygroscopic food and biomaterial powders is traditionally performed with complex glass instruments. This property is used to characterize material stickiness, which substantially affects the flow and physical behavior of powders. In this research study we developed a new m…