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Targeted Preparation of Composite Based on PP with Inorganic Micro-, or Nanofiller with Different Adhesive Interlayer
Dombková, Julie ; Krčma, František (referee) ; Nezbedová, Eva (advisor)
The diploma thesis studies composite of PP and filler particle. As a particle filler was used commercially available CaCO3 (SOCAL 31). The submitted thesis had a goal to find new approaches and technologies of filler surface treatment in order to improve properties of composite materials. The plasma discharge behind static pressure was used for the surface treatment of the fillers. These fillers were afterwards analyzed by using of sedimentation analysis, turbidimetry, infra-red spectroscopy (FT-IR), X-ray diffraction analysis (XRD), scan electron microscopy (SEM), transmission electron microscopy and particle size distribution by laser diffraction. The composites with various volume parts of the fillers were prepared in PIB and studied by short-time tests. Furthermore, the influence of an adhesive layer on fracture mechanical properties of prepared composite was study. Regarding to experimental demand, there was not possible to realize long-term mechanical properties.
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Design, production and characterization of the adhesive layer for the deposition of ta-C coating by the magnetron sputtering method
Drásalová, Kateřina ; Juliš, Martin (referee) ; Klakurková, Lenka (advisor)
The topic of this thesis is improving the adhesion parameters of the DLC (diamond-like carbon) coating, specifically for its non-hydrogenated form ta-C (tetra amorphous carbon), for the deposition of ta-C coating by the magnetron sputtering with a central rotating cathode method. A possible solution is the creation of a chrome adhesive layer between this coating and the substrate. Effects of the adhesive layer on the coating are controlled by change settings of a process parameters as temperature, voltage, or time of deposition. The aim of the experiment was the production of such an adhesive layer that will increase the adhesion of the ta-C coating without worsening its other properties. The resulting properties of the deposited coating were analysed using a calotest for thickness measuring, Rockwell test and scanning electron microscopy (SEM) to assess adhesion and cohesion parameters, instrumented penetration tests to determine hardness and bent-strip method to calculate internal stress. By evaluating the prepared samples, depending on the resulting useful properties of the coating, the best deposition parameters were determined.
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Targeted Preparation of Composite Based on PP with Inorganic Micro-, or Nanofiller with Different Adhesive Interlayer
Dombková, Julie ; Krčma, František (referee) ; Nezbedová, Eva (advisor)
The diploma thesis studies composite of PP and filler particle. As a particle filler was used commercially available CaCO3 (SOCAL 31). The submitted thesis had a goal to find new approaches and technologies of filler surface treatment in order to improve properties of composite materials. The plasma discharge behind static pressure was used for the surface treatment of the fillers. These fillers were afterwards analyzed by using of sedimentation analysis, turbidimetry, infra-red spectroscopy (FT-IR), X-ray diffraction analysis (XRD), scan electron microscopy (SEM), transmission electron microscopy and particle size distribution by laser diffraction. The composites with various volume parts of the fillers were prepared in PIB and studied by short-time tests. Furthermore, the influence of an adhesive layer on fracture mechanical properties of prepared composite was study. Regarding to experimental demand, there was not possible to realize long-term mechanical properties.
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