Materials Literature
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This paper describes some possibilities of using electron beam welder to machine plastics. Several different types were tested including PC, PMMA, PVC, PTFE, PE, POM and PP. For initial study how certain material react to the electron beam, the sets of lines were cut onto the surface. Lines were done by the deflection…
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Yangının oluştuğu mekânının terk edilmesine olanak sağlayacak sürede, yapının taşıyıcılığının sağlanmalıdır. Dolayısıyla beton, kaçış süresi boyunca bütünlüğünü koruyacak ve yapının çökmesinin engellenecek şekilde tasarlanmalıdır. Yangına dayanıklı kompartımanların oluşturulması, sıcaklığın beton bileşenleri üzerinde…
In this work CuIn1-xGaxSe2 (CIGS) thin films with three different values of x (0; 0.28; 1) were prepared by nonreactive sputtering of Cu, In and Ga in HiPIMS (High Power Impulse Magnetron Sputtering) or DC magnetron and subsequently selenized in an Ar+Se atmosphere. Optical emission spectroscopy (OES) was used to moni…
Silicon nitride based ceramics have received considerable attention during the last decades due to their very good room and high-temperature properties. Such ceramics are acknowledged as first choice for application of modern hybrid bearing applications. The influence of crack bridging by the elongated grains present…
The present work shows a different approach in which integrally skinned or thin film composite membranes are prepared separately, in flat sheet as well as hollow fibre configuration, and then post-treated with a compatible ionic liquid.
In this study the application of a neural network to estimate the crack propagation and crack size in CeO2 coatings on a Ni substrate during processing at temperature was evaluated as a function of the Ce content in solutions with increasing processing temperatures from 24 oC and 700 oC. In this respect, CeO2 coatings…
Detail záznamu - Exciton-exciton annihilation in metallo-supramolecular polymers with Zn(II) ion-couplers studied by pump-probe transient absorption spectroscopy - Detailní zobrazení záznamu - Knihovna Akademie věd České republiky
Detail záznamu - Evolucia struktury aerogela na osnove ZrO2, polucenogo metodom sverhkriticeskoy suski v geksaftorizopropanole, v processe termiceskoy obrabotky - Detailní zobrazení záznamu - Knihovna Akademie věd České republiky
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One of the available routes to developing a new material resistant to high-temperature creep is to create a microstructure consisting of a metal matrix and dispersed stable particles. For making intricately shaped components from such materials, new processes must be found to allow near net shape products to be manufa…
Clay minerals, which constitute a major part of the surface crust, are layered hydrous silicates (phyllosilicates). We are literally surrounded by them. Occurs in nature as small particles, usually flaky shape. In order to facilitate their interpretation based study (particularly in X-ray diffraction) often results ob…
This paper presents the measurement of the needle thread tension in an industrial sewing machine using various sewing threads. In this work, three types of sewing threads, air-jet textured (PET), core-spun (PET/PET) and (PET)-spun were used. Two lubricant types and two lubricant feeding rates were applied to these sew…
Soft magnetic composite (SMCs) are basically designed as a ferromagnetic powder surrounded by thin electrically insulating layer. The formed dielectric layer may have an organic or inorganic nature. The advantage of widely use of organic binders lie in the smart preparation of composites, high density of final green c…
The contents of 3d-transition metals (Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn) in fragments of medieval glass bracelets, found in the necropolis of Stambolovo and the castle of Mezek, Bulgaria, were determined by total reflection X-ray fluorescence (TXRF) analysis using gallium as internal standard. The samples were anal…
Our study is focused on the preparation of electrospun nanofibrous support based on poly(2,6-dimethyl-1,4-phenylene oxide) (PPO). Electrospun PPO support with the mean fiber diameter 150 nm exhibited high porosity (80%) and suitable transport properties. Platinum and palladium catalysts were supported on electrospun n…
Bu çalışmada, optimum soğuk sarı kaplama koşulları belirlenerek, soğuk sarı kaplamanın zamak-5'in korozyonuna etkisi araştırılmıştır. Soğuk sarı kaplama koşullarının berlirlenmesinde optimum sıcaklık, akım, süre ve banyo bileşim parametreleri belirlenmiştir. Zamak-5 üzerindeki zemin kaplama olarak kullanılan soğuk sar…
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Main principles of the lately introduced method of Magnetic Adaptive Testing (MAT) are described. The method is applied to measurement of the fatigue damage level and residual lifetime of technical objects manufactured from ferromagnetic construction materials. The up-to-now existing experiments and experience gave sa…
In mice, the inhalation of PbO nanoparticles causes changes to the lung morphology that are typical for inflammation, and the strength of which is influenced by the nanoparticle concentration.