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Preparation of large and complex-shaped ceramics parts
Prehradná, Jana ; Pouchlý, Václav (referee) ; Trunec, Martin (advisor)
This bachelor’s thesis deals with research of ceramic materials in field of material engineering. The first part deals with biomaterials, especially bioceramics, its types, properties and its usage. The second part of this thesis deals with transparent ceramics and the third part includes the procedure and method of gel casting. The experimental part is dedicated to production of large and complex shaped components - knee joint, spherical cover and discs with transparent properties. The method of gelcasting was used for samples preparation of this type. The task was not only to produce these samples, but also to find suitable surrounding conditions for the proper course of the entire production process.
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Preparation and properties of machinable ceramic materials
Sláma, Martin ; Matoušek, Aleš (referee) ; Cihlář, Jaroslav (advisor)
The thesis is focused on studying the machinability of ceramic material in dependence on presintering temperature. Alumina was used as an experimental material. The machinability of alumina was observed on samples produced by uniaxial pressing. Presintered and not-presintered disks were machined by cutter. Disks were presintered at 700°C, 800°C, 900°C and 1000°C for one or two hours. Machinability of alumina was tested according to four levels of the milled depth and according to temperature and the effect of dwell.
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Study of bioceramic materials on the base of calcium phosphates
Kolář, Martin ; Maca, Karel (referee) ; Cihlář, Jaroslav (advisor)
The literature search on the topic of Bioceramic materials focused in layered materials based on calcium phosphates was written up. Based on knowledge obtained, experiments of preparation of calcium phosphates layered materials based on calcium phosphates by spin-coating method focused in optimalization of layer application conditions were designed and carried out. Experiments of preparation of hydroxyapatite bulk ceramics by uniaxial pressing followed by heat treatment were also performed. Prepared layered and bulk ceramics were characterized from bioactivity point of view by testing of their interaction with simulated body fluid.
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Bioceramic Materials and Their Biocopatibility with Bone Tissues
Novotná, Lenka ; Trunec, Martin (referee) ; Cihlář, Jaroslav (advisor)
The thesis concerns the study of ceramic coatings of zirconia nanoparticles deposited on alumina, zirconia and glass substrates by ultrasonic spraying. The quality of deposits was investigated in dependence on the type of substrate (composition, temperature, roughness) and concentration of ceramic suspension. The best results were received by the deposition of suspension of low concentration on rough substrates at low temperatures. The biocompatibility was tested in vitro. Good cytocompatibility of ceramics with nanostructure coatings was found.
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