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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
High-speed sintering of ceramic materials
 Chvíla, Martin ; Spusta, Tomáš (referee) ; Pouchlý, Václav (advisor)
Modern ceramic materials are of a key function in a number of applications in all industrial sectors. The process of preparation of the modern ceramic materials includes an important technological step – sintering. Recently methods operating also with sintering by an electric field have been used. These methods are called non-conventional sintering methods (Spark Plasma Sintering, Flash Sintering etc.) and they represent a promising progress in the manufacturing of advanced ceramic materials. These methods provides time and energy saving, and materials produced by these technologies can achieve better specific properties. The sintering in Spark Plasma Sintering have been in the past few years subject of intensive research. Nevertheless, all the sintering conditions (for example the sintering mechanism) in Spark Plasma Sintering are not completely clarified. The aim of this thesis is to summarize the findings about the preparation of advanced ceramic materials using the non-conventional methods of sintering. During experimental work, the effect of the heating rate while sintering by the Spark Plasma Sintering method on the amount of activation energy of sintering that is needed for sintering of the material ZrO2 + 3 mol. % Y2O3 with regard to the microstructure has been investigated. During the thesis was proved that the time and energetic efficiency is increased using the Spark Plasma Sintering method with higher rating rate (50 °C/min compared to 750 °C/min). The relative densities of samples manufactured by using different heating rate with constant pressure stayed almost unchanged. By using higher heating rates, it was possible to achieve a high relative density and shrinkage already at lower temperature. The method of Master Sintering Curve proved that the activation energy of sintering decreases when higher heating rates of sintering were used.
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High-speed sintering of ceramic materials
 Chvíla, Martin ; Spusta, Tomáš (referee) ; Pouchlý, Václav (advisor)
Modern ceramic materials are of a key function in a number of applications in all industrial sectors. The process of preparation of the modern ceramic materials includes an important technological step – sintering. Recently methods operating also with sintering by an electric field have been used. These methods are called non-conventional sintering methods (Spark Plasma Sintering, Flash Sintering etc.) and they represent a promising progress in the manufacturing of advanced ceramic materials. These methods provides time and energy saving, and materials produced by these technologies can achieve better specific properties. The sintering in Spark Plasma Sintering have been in the past few years subject of intensive research. Nevertheless, all the sintering conditions (for example the sintering mechanism) in Spark Plasma Sintering are not completely clarified. The aim of this thesis is to summarize the findings about the preparation of advanced ceramic materials using the non-conventional methods of sintering. During experimental work, the effect of the heating rate while sintering by the Spark Plasma Sintering method on the amount of activation energy of sintering that is needed for sintering of the material ZrO2 + 3 mol. % Y2O3 with regard to the microstructure has been investigated. During the thesis was proved that the time and energetic efficiency is increased using the Spark Plasma Sintering method with higher rating rate (50 °C/min compared to 750 °C/min). The relative densities of samples manufactured by using different heating rate with constant pressure stayed almost unchanged. By using higher heating rates, it was possible to achieve a high relative density and shrinkage already at lower temperature. The method of Master Sintering Curve proved that the activation energy of sintering decreases when higher heating rates of sintering were used.
Detailed record

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