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Surface cleaning of archaeological objects by plasma generated in water solutions
Tihonová, Jitka ; Grossmannová, Hana (referee) ; Krčma, František (advisor)
This bachelor thesis is focused on the plasma surface treatment of historical ceramics by low temperature electrical discharges in water solution. Four samples were chosen - two of the Lusatian Urnfields Culture and two of Anabaptist Faience. The treatment was done at minimum power of the power supply. Stainless steel electrode and a specially designed electrode system with wolfram wire in the quartz glass capillary were used for generation of discharge using an audio frequency power supply. Elemental analysis by scanning electron microscopy (SEM) was done before and after the treatment and values were compared with the elemental analysis of material’s core. Samples of the Lusatian Urnfields Culture were successfully treated without any surface damage. The first one of samples of Anabaptist Faience was damaged. The experiment was repeated on the glass to determine the cause. It was find out that damage was probably caused by thermal stress. The second one of Anabaptist Faience was already treated without damage. Next research will be focused on determining specific conditions of the power supply, modification of water solution and modification of sample’s surface for the most efficient ancient ceramics cleaning.
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Study of the ETICS surface resistance to biotic attack
Těžká, Adéla ; Žák,, Antonín (referee) ; Žižková, Nikol (advisor)
This diploma thesis deals with the study of resistance of ETICS surface treatments to biotic attack. The theoretical part elaborates a research focused on biotic attack of facades of buildings insulated by contact insulation systems ETICS. Based on the information obtained during the elaboration of the bachelor thesis and further study, the optimization methodology of ETICS surface treatment resistance to biotic attack proposed in 2018 is elaborated. In the practical part, the proposed methodology is verified, evaluated and recommendations concerning the suitability of using the proposed methodology in construction practice are implemented.
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Surface treatment of ABS parts after FDM 3D print
Světlík, David ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
This master thesis deals with the surface treatment of parts made of plastic produced using FDM technology and design of technological device for surface treatment. The thesis describes FDM principles, according to performed experiments in a technological device there are suggested technological conditions for the surface treatment of parts made of ABS plastic. In the end of the thesis, there are calculated costs of the technological device and its operating costs, also mechanical properties, surface roughness and other specifications from before and after the treatment are compared.
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Metallization of technical plastics for lightweight traffic components with reduced fuel consumption
Sanetrníková, Dominika ; Boušek, Jaroslav (referee) ; Šimůnková, Helena (advisor)
The beginning of this thesis is dedicated to polymeric materials, which include plastics an composites. Plastics are shortly divided into two groups, thermoplastics and thermosets. The following part is the use of plastics and composites in traffic industry and briefly this work focuses on techniques of recycling of this materials. This work also focuses on the techniques of thin film deposition, electroless plating, electrodeposition as well and plating in the vacuum environment. special techniques of thin film deposition are also mentioned shortly. The coatings of polymer including cleaning and surface activation is introduced using various techniques including plasma treatment. The surface treatment of polyetheretherketone (PEEK) is included too. The final part describes performed experiments and discussion of results.
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Surface treatments of internal combustion engines cylinders
Malec, Petr ; Raffai, Peter (referee) ; Maršálek, Ondřej (advisor)
This bachelor thesis is a professional research, which describes the most common methods of surface treatments of modern internal combustion engines cylinders. The work consists of the distribution of the species changes, their use and justification of their application. It also describes the technology of individual surfaces, their coating and finishing operations to achieve the best results of sliding surface.
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Anticorrosive modification of electric motors surface
Vlčková, Irena ; Straková, Monika (referee) ; Gráf, Jiří (advisor)
This Master´s thesis is devoted to the basic theory from semester project. There are describe completed practical tests, measurements and results. This project was written below patronage of company Siemens s.r.o. odštěpný závod Elektromotory Mohelnice, which is at the same time also my employer. There is production of asynchronous electromotors frame size 56 to 200. On the all of electromotors is desired quality surface treatment with difference on the base of request of customers.
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The Cylinders of Four-stroke Engines
Vanda, Marek ; Řehák, Kamil (referee) ; Dlugoš, Jozef (advisor)
The topic of this bachelor thesis is Cylinders of Four-stroke Engines. First part is about four-stroke cycle, engine construction. Next parts are about cylinders, their function and requirements. Also included is the importance of the cylinders on the engine operation and engine life. Last part is focused on the construction, materials of the cylinders and their usage in the past and today.
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Surface treatments of parts internal combustion engines
Toman, Josef ; Novotný, Pavel (referee) ; Maršálek, Ondřej (advisor)
This bachelor thesis is a professional research dedicated to the most frequently used surface treatments, applied to the stressed parts of internal combustion engines. The thesis also refers to surface treatments classification, benefits for the automotive industry and reasons for their development. Further it focuses on definitions of the technologies used, characteristics of processes and coatings, finishing operations after surface treatments and application of these treatments on the parts of internal combustion engines.
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Methods of assessing the increase in the durability of concrete products with a painted surface with a subsequent cure
Minaříková, Kateřina ; Eger, Lukáš (referee) ; Hubáček, Adam (advisor)
This diploma thesis is focused on the description and summary of existing knowledge about vibro-pressed concrete products with treated surface with protective coating, that is hardering by ultravioled and infrared radiation. The theoretical part describes the production of vibro-presses products, possible wayt of finishing the surface including the description of the most commonly used materials and the methods of application and hardering of protrctive coating on the surface. Another point of the theoretical part is creating of lime efflorescence on the concrete surface and their subsequent disappearance. The experimental part of the thesis is ficused on obtaining information about the properties of the modified pavements by these techologies and comparing the acquired properties with the charakteristice of the reference pavements that do not have any protective coating on their surface.
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