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Novel materials for sensing and biosensing
Jyoti, Jyoti ; Mayorga, Paula (referee) ; Cho, Nam-joon (referee) ; Pumera, Martin (advisor)
Materiály na bázi 2D použité ve 3D tištěných elektrodách a nano/mikromotorech se staly špičkovými technologiemi. Získaly širokou pozornost díky svým výjimečným charakteristikám, které je předurčují pro použití v senzorových a biosenzorových aplikacích. Výzkum nabízí cenné vhledy prostřednictvím systematického výzkumu za účelem podpory pokroku v senzorových technologiích. 3D tištěné elektrody z nanouhlíku eliminují potřebu konvenčních elektrod tím, že poskytují výhody jako snadnou výrobu, rychlou produkci, vynikající přesnost a přizpůsobení tvarů v závislosti na našich požadavcích. V důsledku toho zjištění této práce zdůrazňují univerzálnost 3D tištěných elektrod z nanouhlíku v aplikacích, které zahrnují fenoly, pesticidy a biosensing, zejména detekci DNA. Dále jsme zkoumali aktivní kvantové materiály na bázi mikromotorů pro detekci DNA, stejně jako aplikace pro bezpečnost potravin. Tato technologie příští generace kombinuje atraktivní vlastnosti kvantových materiálů spolu s jejich autonomní pohyblivostí jako mikromotory, což detekci urychluje a nabízí cenově dostupné platformy pro senzoriku a bioanalýzu. Řešením výzev souvisejících s využitím analytu, zejména těch s rychlou akcí a toxicitou, práce zkoumá pokročilé metody detekce, které zahrnují moderní technologie nabízející inovativní řešení. Zjištění přispívají k probíhající evoluci technologií nezbytných pro řešení současných výzev v analytické chemii a bioanalytické chemii.
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Friction and lubrication of total hip replacement produced by 3D metal printing technology
Uhrová, Simona ; Horák, Zdeněk (referee) ; Vrbka, Martin (advisor)
This thesis investigates the tribological properties of total hip replacements manufactured by both traditional and additive technologies. The primary objective is to assess the impact of different manufacturing methods on friction and lubrication at the contact between the joint head and the acetabular cup. Techniques such as a pendulum joint simulator and optical methods are utilized to analyse the lubricant film formation and friction coefficient. The findings indicate that additively manufactured implants can potentially offer comparable or superior tribological properties compared to traditional methods, potentially leading to enhanced longevity and functionality of the implants. However, the need for appropriate surface treatment and further research into wear to ensure extended life and improved implant functionality is emphasised.
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3D printing with silver and its use in jewellery
Thomas, Marek ; Langerová, Petra (referee) ; Sučková, Magda (advisor)
Hlavním cílem této práce je najít vhodný typ aditivní tiskárny, která by byla schopna kvalitního 3D tisku stříbrných šperků. Práce seznámí čtenáře s několika typy aditivních tiskáren (FDM, SLA, DMLS a dalších), jejich využitím v praxi a fyzikálním a chemickým chováním stříbra při aditivním tisku. Důraz bude kladen na praktické uplatnění těchto speciálních 3D tiskáren, a to především ve šperkařství. Poslední část práce se pokusí zodpovědět otázku, zda je technicky a ekonomicky proveditelné sestavit a bezpečně provozovat danou 3D tiskárnu v menších firmách či v domácím prostředí.
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Use of modern manufacturing technologies for transmission components
Drapač, Jiří ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The aim of this bachelor thesis is to evaluate the possibilities of application of alternative production technologies in the company Wikov MGI a. s. for the production of gearbox components. The review part of the thesis deals with additive technologies, which are Selective Laser Melting (SLM), Binder Jetting (BJ), Cold Spray (CS) and Wire Arc Additive Manufacturing (WAAM). For each method, the pre-production preparation, process with printing parameters and post-processing are described. In the next section, each technology is critically evaluated for applicability to gear components. From the results, the most appropriate application of the technology to one selected component is detected. In the practical part, optimization of dimensions and weight is performed by design modification of the selected component. On the basis of economic and technical calculations, a comparison between the current and the proposed manufacturing process is made.
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Friction of Titanium Surfaces in Implantology
Heto, Matyáš ; Odehnal, Lukáš (referee) ; Ranuša, Matúš (advisor)
This bachelor thesis focuses on the frictional properties and wear resistance of Ti6Al4V alloy. This alloy is suitable for use in orthopaedic implants such as the first metatarsophalangeal (MTP) joint in the big toe. The aim is to investigate different surface treatment methods that can reduce friction and wear of this material. The effect of applying DLC coatings and creating microtextures or microstructures on the surface is described. Metal on metal pair tests have been carried out using profilometer and tribometer in pin on plate configuration. The results show a noticeably higher coefficient of friction for the Ti6Al4V alloy than for the compared CoCrMo alloy. DLC coating significantly helped in reducing the friction and wear of Ti6Al4V. This cannot be said for the two microstructures tested, which did not have a significant effect on the observed tribological properties. The results indicate the importance of surface treatment of Ti6Al4V alloy for use in implants.
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Evaluation of the machinability of material produced by additive manufacturing
Bílek, Richard ; Drbal, Martin (referee) ; Kolomý, Štěpán (advisor)
This bachelor thesis evaluates the machinability of high strength maraging steel M300, which is produced in three types of samples. Two samples were additively manufactured by Selective Laser Melting, one of which was subsequently heat treated. The third sample was produced by conventional rolling. Testing was carried out by milling under different cutting conditions. In the practical part the resulting chips were taken and hardness of individual samples, then the individual cutting forces during machining, surface roughness and the flank wear were measured. The measured data and chips morphology were further analysed and evaluated. The output of the work is a recommendation of the appropriate cutting speed for machining the additively manufacturing maraging steel M300.
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Assessment of the use of 3D printing technology in the automotive industry
Ondriska, Josef ; Libich, Jiří (referee) ; Binar, Tomáš (advisor)
This thesis deals with 3D printing technology and analysis of various polymeric additive manufacturing materials, with a focus on their application in the automotive industry. In the experimental part, three types of material are tested for mechanical properties, both without degradation and after degradation by a climate chamber. In the tensile strength test, the possibility of using acoustic emission as a diagnostic method was verified. From the results obtained, a specific part used in the automotive industry was designed. The work also includes the design of a stationary
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Design of 3D printed CubeSat structure for mission KOSTKA
Picka, Marek ; Götthans, Jakub (referee) ; Götthans, Tomáš (advisor)
Tato diplomová práce zkoumá inovativní návrh a implementaci 3D struktury pro CubeSat misi KOSTKA, kterou aktuálně vyvíjí univerzitní tým YSpace. S využitím pokročilých technologií aditivní výroby - selektivního laserového tavení (SLM) a přímého laserového spékání kovů (DMLS) - si tato práce klade za cíl optimalizovat strukturu CubeSatu zvý- šením strukturální integrity, snížení hmotnosti a vyhovění standardům a požadavkům. Proces návrhu zahrnoval iterativní vylepšení na základě analýz, které identifikovaly kritické body napětí a vedly k úpravám pro zlepšení rozložení zatížení a minimálního využití materiálu. Výsledné simulace potvrdily strukturální integritu rámu v simulovaných podmínkách startu, což dokazuje, že rám splňuje požadavky poskytovatele startu a cíle mise. Tato práce nejen dokazuje proveditelnost 3D tisku pro výrobu struktur cubesatů, ale také bude složit jako inspirace pro budoucí designy.
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Spatial materials for additive manufacturing in civil engineering
Říha, Tomáš ; Apeltauer, Tomáš (referee) ; Podroužek, Jan (advisor)
The bachelor thesis deals with additive manufacturing in the construction industry and with materials used in this field. The first part of the thesis defines the 3D printing, briefly describes the history of this progressive technology and gives an overview of the used methods and technologies. The printing methods are divided according to the physical state of the basic material used for printing. The next part of the thesis presents the possible use of additive manufacturing in the construction industry and an overview of realized projects. Finally, at the end of the theoretical part are introduced materials applicable to additive manufacturing in the construction industry and is defined the concept of spatial materials. Spatial materials are a relatively new term, which is not yet in the literature sufficiently defined. These materials can be used for an application in a space where the structure and the position of their particles can be optimized. They can be applied for the creation of 2D filling structures, which are more useful for geometrically simple and simply loaded constructions. It is preferable to use spatial materials to create 3D structures that are designed to fill numerically optimized structures. These structures are based on the principle of double curvature and on a triply-periodic minimum surface (TPMS). In the practical part of the thesis was created the design of building block filled with 3D gyroid structure, designed for prefabrication by using additive manufacturing in the factory or at the site of construction. This proposal reflects the increasing demand for easy individualization of constructions and building elements. Especially, the demand for the creation of structures and shapes which are topologically optimized with a customized appearance and sufficient strength, all at the customer's request.
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Experimental 3D printer for the selective laser sintering of polymers
Kroutil, Tomáš ; Čížek, Petr (referee) ; Paloušek, David (advisor)
The diploma thesis deals with design and realization of experimental 3D printer for selective laser sintering of plastic powders. The output of the work is a device that can create the main process conditions for laser sintering. A diode laser is used in the device, which allows aluminum composite powders to be processed. The printer allows you to heat up the applied layer of powder and set-up space. The research section focuses on similar equipment, process parameters, laser technology and control system. The design section contains solution variants and a description of the chosen solution.
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