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Zjištění odolnosti nátěrové hmoty vzhledem k tloušťce vrstev a počtu nánosů / Determining the resistance of paint films due to the thickness and number of layersJežek, Jan January 2016 (has links)
In the theoretical part of this work there is described the theory of coating substances: sorts of coating substances, making a coating (paint) film and requirements of coating matters. In the practical part there was being found an affect of cold liquids upon concrete coating substances, an affect of the thickness of the coating film upon the resulting surface resistence and an affect of wood upon the quality of the coating. No difference of film quality of coating substances applied to conifers and leafy wood was evidenced. The quality of coating was applied to plawood materials where pores of the upper veneer were filled with paste and so there was no difference between conifers and leafy wood. According to statistics there is no important affect upon the film quality. The coatings 80 and 150g/m2 were used, which are the limited statements of an interval recommmended by producers and the quality of coating is declared. The result: the most aggressive liquid was remover, then plum brandy, Savo liquid, vinegar and mouthwash. Jar, the preparation for washing dishes, was the least aggressive.
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Studium vlastností kovových materiálů připravených technologií nízkoteplotního kinetického naprašování / Properties of Metallic Materials Prepared by Cold Spray TechnologyPiňos, Jakub January 2013 (has links)
Cold spray is a novel coating method. Due to its low-temperature character, it has a potential to replace the high-temperature thermal spray processes in some applications. The presented work analyzes the microstructure and the phase composition of pure metal coatings deposited by cold spraying and evaluates selected mechanical properties. Specimens prepared by readily used HVOF industrial technology were used for comparison purposes.
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Studium růstu 1-D struktur obsahujících atomy kovů III a IV skupiny pomocí STM / STM study of growing 1D nanostructures composed by III and IV group atomsKučera, Michael January 2011 (has links)
In the presented work we study Al and Sn on a Si(100)2$\times$1 surface by means of STM. Peculiarities of displaying and morphology of metallic structures are investigated. Utilizing the STM to investigate Al and Sn, we obtain the growth characteristics for various coverage and temperatures at deposition. It is shown, that island size distribution is scalable for both metals and has a qualitatively different character. In order to interpret the growth characteristics and obtain unknown microscopic parameters, a new software tool for kinetic Monte Carlo (kMC) simulations of aluminum was conceived.
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Plazma pro biomedicínské a ekologické aplikace / Plasma for biomedical and envornmental applictionsMAROUŠEK, Rostislav January 2014 (has links)
This diplom theses is concerned with the possibilities of using non-thermal plasma in biomedical and enviromentally friendly applications. The theoretical part is drawn up as research overview of the current knowledge from the stated issue. The practical part is focused on the modification of nanofibres by deposition of TiOx layers.
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Sondová diagnostika nízkoteplotního plazmatu při depozičním procesuKOZLOVÁ, Miroslava January 2017 (has links)
This master thesis deals with examination of the parameters of low temperature plasma which is used for the deposition of thin layer of ITO. The method which is used in this thesis is the probe diagnostics. This thesis is divided into two parts. The first is the theoretical part, in which the basic parameters of low temperature plasma, principles of the probe diagnostics, and theories for this method are explained. The second part is the practical part, which presents the results of the measurement depending on changes in conditions of deposition.
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Systém pro měření malých průtoků / The system for measurement of little flowKarásek, Eduard January 2010 (has links)
Diploma thesis solves how to create system for measurement of little liquid flows. The basic types of liquid flowmeter, which are possible used for measurement of little liquid flows, are described in the introduction part of thesis. The limit for little flow is often determined as flow 100 mg.min-1 and low. Second part of this thesis describes the ways of capillary production and practical experiments with them. Thesis is focused to thick film technology and LTCC technology. Next part of this work is solution of simple measuring unit for measurement of little flows less than 100 mg.min 1, which is controlled by microprocessor ATmega16. The measuring unit can be worked separately or can be connected to PC. The next possibility of flowmeter optimisation is summarized in end of thesis.
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Modernizace aparatury IBAD / Improvement of IBAD apparatusUrbánek, Ivan January 2008 (has links)
This thesis is divided into three main parts dealing with ion beam assisted deposition. In the first part there is a brief description of the IBAD chamber at Institute of Physical Engineering of BUT. There is also a detailed description of control of the IBAD apparatus during deposition. Next part deals with measuring of deposition rates of ion sputtering in order to refine deposition of thin layers. Last part deals with planned and already finished changes that should improve quality and speed of thin layers deposition. Changes include the option of covering the substrate holder, change of the entry flange, design of new insertion chamber with multifunctional substrate holder and the option to control the deposition by computer.
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Automatizace a řízení depozice multivrstev metodou IBS/IBAD / Automation and control of multilayers deposition by IBS/IBADPavera, Michal January 2011 (has links)
This diploma thesis deals with the automation of the deposition process by ion beam sputtering and ion beam assisted deposition. This work contains drawings of mechanical adjustments of the deposition chamber designed to control shutter and rotation of the target using stepper motors. There are presented ways to control stepper motors and troubleshoot their exact settings. Another task is to design a system for computer control of the deposition process. There are discussed ways to control the ion sources, pressure meter, flow meter and thickness meter, and their connection to a PC via RS-232 and analog-digital converters. It is also designed control program in LabVIEW, which allow automated multilayer deposition. Last part of the thesis deals with testing automatic deposition and results are commented.
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Vlastnosti vrstev oxidu titaničitého připravených z koloidních disperzí získaných kulovým mletím / Properties of titania layers fabricated from ball-milled colloid dispersionsRajmonová, Anna January 2017 (has links)
This diploma thesis deals with changing properties of the thin layered titanium dioxide dispersion depending on the time of ball-milling. Titanium dioxide is immobilized on glass or conductive glass using the spin-coating method and the prepared thin layers are then characterized by various analytical methods. All of used analytical methods are described in theoretical and experimental sections, these methods include scanning electron microscopy, profilometry, dynamic light scattering, integrating sphere, ellipsometry, BET isotherm, voltammetry and chronoamperometry. At the summary of this diploma thesis is described how the properties of titanium dioxide thin layers change during ball-milling process.
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Studium tloušťky tenkých vrstev organických materiálů / Study of thin film organic materials thicknessHegerová, Lucie January 2008 (has links)
The diploma thesis deals with the determination of thickness and refractive index of thin organic films using image analysis. In the theoretical part there are described principles of the methods, which are used to prepare the films (spin coating, inkjet printing, vapour deposition), the characteristics of thin films, ways of finding out the thickness and refractive index of substances (weight methods, electric methods, method based on measurement of absorption coefficient of light, interference microscopy, ellipsometry) and also image analysis (harmonic and wavelet analysis). Interference microscope Epival - Interpako (Carl Zeiss Jena), digital camera Nikon Coolpix 5400 and computer were used for the determination of thickness and refractive index. The thicknesses of layers were set on the basis of interference images of edges and grooves – both from the side of the metal contact and the side of underlying glass. The refractive indices of thin layers were then set using the recorded figures. In the final part of the thesis there are discussed the results of interference images photographed along the full length of the aluminium contact which are used for measuring electrical characteristics of DPP structures. The produces are thicknesses and refractive indices of individual layers.
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