Materials Literature
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Στόχος της παρούσας μεταπτυχιακής εργασίας είναι μελέτη της συμπεριφοράς προφίλ αλουμινίου 6063 σε αξονική φόρτιση για διαφορετικές θερμικές κατεργασίες, ώστε να εξαχθεί ένα συμπέρασμα για την ικανότητα απορρόφησης ενέργειας. Οι μεταβλητές που μελετήθηκαν ως προς τη θερμική κατεργασία γήρανσης αφορούν στη θερμοκρασία…
Στην εργασία αυτή παρουσιάζεται μία μελέτη της διαμόρφωσης με έκταση επίπεδων ορθογωνικών δοκιμίων σε τρία διαφορετικά υλικά. Συγκεκριμένα εξετάζονται το αλουμίνιο , ο χαλκός και ο ορείχαλκος. Αρχικά γίνεται μια θεωρητική εισαγωγή για τις κατεργασίες και εξετάζεται η διαμόρφωση σε έκταση μέσω του punch stretching. Στη…
National audience
Mnogi sodobni materiali s svojimi izboljsanimi ali povsem novimi lastnostmi resujejo stevilne probleme in s tem ponujajo dodano vrednost pri uporabi. Razsirili so se napredni kompozitni materiali, saj je njihova velika prednost, da lahko njihove lastnosti nacrtujemo vnaprej glede na njihovo koncno uporabo. Umetno povz…
Perovskite (ABO3) type ferroelectric materials are most promising materials for multifunctional ferroelectric and other electronic devices. Lead titanate (PbTiO3) ferroelectric ceramic is one of them. It is a very good ferroelectric material but the drawback of this material is that it is highly brittle due to very hi…
A challenging application space exists for high-aspect-ratio, high-fidelity dielectrics in micro-electro-mechanical system (MEMS), microelectronic, and photonic applications. Photosensitive polymers are widely used in these fields because they are relatively easy to process and pattern, and have good mechanical proper…
This work is the first to show a size dependence on the activity of palladium catalyst in the frame of methane oxidation. But it also highlights a new method to determine in an accurate manner the metallic surface of catalyst. We currently aim at developing new methods to obtain palladium nanoparticles with size and s…
Field effects techniques, such as field emission microscopy (FEM) and field ion microscopy (FIM), are used to investigate the dynamics of reactions taking place on the surface of model catalysts (“field emitter tips“). Those studies are made under truly in-situ conditions. Nanometer resolution is achieved with these m…
Power conversion efficiencies of plastic solar cells depend strongly on the molecular weight characteristics of the semiconducting polymers used for their fabrication. The synthesis of these materials typically relies on transition metal mediated catalytic reactions. In many instances, the ideal structures cannot be a…
We prove that every YES instance of Balanced ST-Connectivity has a balanced path of polynomial length.
The title compound, [Nd(C(8)H(6)NO(4))(C(2)O(4))(H(2)O)](n), is a layer-like coordination polymer. The Nd(III) ion is coordinated by four carboxyl-ate O atoms from three bridging 5-aza-nium-yl-isophthalate (Haip) ligands, four carboxyl-ate O atoms from two oxalate (ox) anions and one ligated water mol-ecule in a trica…
The viscosity behavior of extrusion pastes comprised of a PVB melt and varying amounts of nano‐zirconia powder have been explored with special emphasis on the impact of a dispersant to reduce the viscosity. In contrast to suspensions with nanopowders, the maximum solid loading in the highly viscous extrusion pastes st…
Gold supported hydroxyapatite (HA) and calcium deficient hydroxyapatite (CDHA) was studied for the room temperature CO oxidation. Nanostructured gold catalyst has been prepared by deposition precipitation method, whereas HA was synthesized by microwave synthesis. Inorder to understand the influence of surface properti…
Previous research demonstrated that a thin self-healing layer is effective in recovering partial sandwich composite performance after an impact event. Many studies have been conducted that show the possibility of using Fiber Bragg Grating (FBG) sensors to monitor the cure of a resin through strain and temperature moni…
One of the most fragile of all molecular liquids, perhydronapthalene (decalin), was recently shown to have quite abnormal low frequency (quasi-lattice) vibrational modes, implying extreme anharmonicity. A molecular liquid of similar structure and fragility, but chemically suited to structural modification, has been fo…
The present paper considers the formation of crystalline phases during solidification and crystallisation of the Zr53Cu21Al10Ni8Ti8 alloy. Solidification was carried out by a copper mould casting technique, which yielded a partially crystalline microstructure comprising a ‘big cube phase’ in a dendritic morphology and…
Denotes aneedin an engineering analytical correspondence between the loadand longitudinal strains of the composite columns. Experimental data on concrete longitudinal strains in the state of passive lateral compression are presented. The generalized form of correspondence for curvilinear stress-strain diagramof concre…
Nanostructured silicon moth-eye arrays for the purpose of antireflectivity in silicon solar cells were previously optimised and fabricated using nanoimprint lithography. Optical properties of these structures in response to wavelength, angle of incidence, polarisation and azimuth orientation are studied using a bespok…
The lithium/sulfur (Li/S) battery is a promising system for energy storage. Its energy density (up to 2.6 kWh/kg) is the highest of all “closed-system” batteries known [1]. The global reaction of this type of cell is S8 + 16 Li ⇄ 8 Li2S, yielding 3400 kJ/mol and a open-circuit voltage of ~2.2 V. However, due to the co…
The electronic structure, energy band structure, total density of states (DOS) and electronic density of perovskite SrTiO3 in the cubic phase are calculated by the using the framework density functional theory (DFT) with the local density and generalized gradient approximation (LDA and GGA) by CASTEP package. The calc…