Materials Literature
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Svojstva konkretnog brzoreznog čelika bitno ovise o primijenjenim parametrima toplinske obrade. U radu su provedena ispitivanja na brzoreznom čeliku proizvedenim metalurgijom praha PM S390 MC koji je toplinski obrađen sa dvije temperature austenitizacije, a za svaku temperaturu austenitizacije varirana su tri različit…
Bei der Transferpfadanalyse und Synthese werden Messdaten und ein Modell der Ubertragungsstrecke verwendet um z.B. einen Schalldruckpegel einer Situation vorherzusagen oder diese Situation zu auralisieren. In Abhangigkeit des gewahlten Modells und der Eingangsdaten stimmen Synthese und Realitat mehr oder weniger gut u…
We propose a modelling and computational approach based on atomistic computations to construct continuum models of nanostructures which are able to take into account surface and size effects in the Finite Element Method (FEM) context. First, we formulate the continuum problem in the Gurtin-Murdoch formalism [1] by int…
This work was launched to study the chemistry of disubstituted 1,8-diaminonaphthalene (R2DAN) as a supporting framework for carbene centers, high oxidation state early transition metals and lanthanide centers. R2DAN ligands are dianionic bidentate groups making them good candidates to stabilize high oxidation state co…
An inciting and much debated subject in the surface enhanced Raman (SERS) studies is an unusual anti-Stokes Raman spectrum distinguished by an abnormal intensity, increasing with the vibrational wavenumber and some discrepancies with regard to the Stokes spectrum. We demonstrate that the abnormal anti-Stokes Raman emi…
Using Callaway’s Model, thermal conductivity o f antimony in the temperature range between (0.4-2. 4)K was calculated. Specialized present study to modif ication the formula of hole(electron)-phonon scatte ring relaxation rate by using phonon wave vector which i s located in the formula of the hole(electron)-phon on r…
Some organic resins novolac,furan and epoxy were blended with inorganic additives Ti O2, CaCO3, Talc, Zn dust and Sintered glass. These materials were formulated to produce ten formula designated fromF10-F100. The toluene diisocyanate (TDI) was used as curing agent at different ratios 5, 10, 15 and 20 parts. The carbo…
Výzkum rozsivkoveho spolecenstva se provaděl na pěti ombrotrofnich raselinistich Jizerských hor, ktere vytvaři vzhledem k hodnotam pH extremně kysele prostředi. Hlavni pozornost byla věnovana skupině epifytických rozsivek z mechorostů rodu Sphagnum. Největsi druhova bohatost byla zaznamenana na Tetřevi louce, kde bylo…
A novel organic solar cell (OSC) concept is introduced by proposing a multi-layer stacked solar cell. Low thicknesses of adjacent ultrathin multi-layers maximize exciton diffusion and due to assuming excellent exciton dissociation and charge carrier transport short-circuit current density (JSC) is optimised. This meth…
This certification report describes the processing and characterisation of ERM®-FA015w, a batch of Charpy V-notch certified reference test pieces. Sets of five of these test pieces are used for the verification of pendulum impact test machines according to EN 10045-2 or according to ISO 148-2. The certified value for…
) no setor siderurgico tem crescido consideravelmente nos ultimos anos devido as excelentes propriedades termomecânicas, anti-corrosivas e refratarias associadas a esta fase, propiciando sua aplicacao como revestimento de protecao de panelas de refino secundario do aco [1]. No entanto, a vida util destes revestimentos…
The Al 2 O 3 -YAG composite has high mechanical strength at high temperatures which allows its use in air craft applications, since it increases the thermal efficiency of jet engines and helps the development of high performance gas turbines. This composite also exhibits some favorable properties toward military appli…
U radu je odreðena ovisnost izmjerene tvrdoæe silicijeve karbidne keramike o primijenjenom optereæenju. Pri odreðivanju tvrdoæe metodom po Vickersu primijenjena su sljedeæa optereæe-nja: 4,91; 9,81; 29,43; 49,05 i 98,1 N. Rezultati pokazuju da izmjerene vrijednosti tvrdoæe osjet-no ovise o optereæenju. U svrhu kvantit…
To the nanoscale, and beyond! Multiscale molecular modeling of polymer-clay nanocomposites Giulio Scocchi a,1, Paola Posocco a, Andrea Danani b, Sabrina Pricl a,∗, Maurizio Fermeglia a a Molecular Simulation Engineering (MOSE) Laboratory, Department of Chemical, Environmental and Raw Materials Engineering, University…
The crystallization operation is widely used in chemical processes, and is one of unit operation which deals with crystallization phenomena. The purposes of crystallization operation are to separate desired component and to produce crystalline particles. However, phenomena of crystallization are not simple and the eff…
Η Terra Creta SA, δημιουργήθηκε το 2001 και μέχρι πρόσφατα \nστεγαζόταν σε ενοικιαζόμενο χώρο στο Βιοτεχνικό Πάρκο Χανίωn \n επιχείρηση διαθέτει όλες τις απαιτούμενες άδειες λειτουργίας και καλύπτει \nπλήρως τις νομικές της υποχρεώσεις. Οι κτιριακές εγκαταστάσεις αποτελούν κατά \nκανόνα απλή κατασκευή με τις πλευρικές…
그라우팅은 건설공사에서 지반의 갈라진 틈이나 공동, 공극 등에 적절한 충전재를 압력을 이용하여 주입하는 것으로, 굴착공사 시 누수방지와 불안정한 지반의 보강을 위하여 광범위하게 사용되고 있다. 가장 많이 사용되고 있는 그라우팅 주입재의 재료로는 물유리계를 주재료로 사용하는 약액주입공법이 많이 사용되어지고 있다. 기존의 물유리계 재료를 사용할 경우 발생하는 용출현상 및 강도저하를 보완하기 위하여 가소성을 부과한 무기질계 재료ECG(Eco Clean Grouting)를 사용하여, 강도 및 내구성이 우수하고 주입재의 용출 현상이 발생하지 않아 환경오염 문제가 거의 없는…
Lindackeria paludosa (Benth.) Gilg is a shrub found mainly in the north of South America and is known as Sarakura in Venezuela. In the light of local reports on the traditional use this member of the Flacourtiaceae family, we investigated the effect of a hydroethanolic extract of the bark (LP) on parameters of the inf…
UO2(NO3)26H2O, n-butylamine and Sulfuric acid were purchased from Acros and used as received. The IR data were recorded as KBr pellets on SHIMSDZU Inc. IR, Prestige-21 Fourier Transform Infrared Spectrophotometer in the range 400 – 4000 cm. X-ray diffraction data for 1 – 3 were collected at -80 °C on a Bruker SMART AP…
In this study, the effects of heat treatments annea ling ,hardening and tempering on the microstructure and hardness of Mn-Fe Alloy were investigated. The Mn-Fe alloy samples were � annealed at 900 ◦C for 20 min then cooling inside furnace and harden ed treatment at 900 ◦C for 20 min with cooling by water, oil, and sa…