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3D microstructure evaluation of developed Si3N4 material for alloyed wire rolling applications
Lövy, Vít ; Salamon, David (referee) ; Chlup, Zdeněk (advisor)
This diploma thesis is devoted to the use of 3D reconstruction using EBSD method for microstructural analysis of silicon nitride ceramic material predetermined for the rolling-mill used in the wire production. Application of this method can be used for the grain structure reconstruction and basic microstructural parameters can be than extracted. The development of a suitable method for 3D reconstruction of the structure of the materials the main aim of this work. There are described the different steps begun by sample preparation from the investigated material trough the optimisation of analysis parameters up to the visualization of the grain structure. New type of sample geometry has been designed which leads to the better and faster observation of the microstructure of ceramic materials. This thesis also describes optimal reconstruction parameters such as the geometry of the assembly used in the microscope without mechanical movement of the sample or the influence of conductive coating prepared via in-situ sputtering of suitable metal, or adjustment of the electron and ion beams. Further are described two options of software which can be used for the final generation of 3D structure information and are assessed their advantages and disadvantages. The effect of the filter setting and other parameters and their influence on the resulting structural parameters are also evaluated.
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Transparent fibre reinforced ceramics
Lövy, Vít ; Drdlík, Daniel (referee) ; Chlup, Zdeněk (advisor)
This bachelor thesis summarizes possibilities of toughening of ceramic materials with various types of fibres and describes the basic principles for preparation of transparent fibre-reinforced composite materials. The role of fibre-matrix interface and the measurement methods enabling estimation of the interfacial strength and other characteristics are explained. The single fibre push-out test using a standard indentation technique was chosen for interfacial parameters determination of the composite consisting from a borosilicate matrix reinforced by SiC fibres in the practical part of this work.
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3D microstructure evaluation of developed Si3N4 material for alloyed wire rolling applications
Lövy, Vít ; Salamon, David (referee) ; Chlup, Zdeněk (advisor)
This diploma thesis is devoted to the use of 3D reconstruction using EBSD method for microstructural analysis of silicon nitride ceramic material predetermined for the rolling-mill used in the wire production. Application of this method can be used for the grain structure reconstruction and basic microstructural parameters can be than extracted. The development of a suitable method for 3D reconstruction of the structure of the materials the main aim of this work. There are described the different steps begun by sample preparation from the investigated material trough the optimisation of analysis parameters up to the visualization of the grain structure. New type of sample geometry has been designed which leads to the better and faster observation of the microstructure of ceramic materials. This thesis also describes optimal reconstruction parameters such as the geometry of the assembly used in the microscope without mechanical movement of the sample or the influence of conductive coating prepared via in-situ sputtering of suitable metal, or adjustment of the electron and ion beams. Further are described two options of software which can be used for the final generation of 3D structure information and are assessed their advantages and disadvantages. The effect of the filter setting and other parameters and their influence on the resulting structural parameters are also evaluated.
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Transparent fibre reinforced ceramics
Lövy, Vít ; Drdlík, Daniel (referee) ; Chlup, Zdeněk (advisor)
This bachelor thesis summarizes possibilities of toughening of ceramic materials with various types of fibres and describes the basic principles for preparation of transparent fibre-reinforced composite materials. The role of fibre-matrix interface and the measurement methods enabling estimation of the interfacial strength and other characteristics are explained. The single fibre push-out test using a standard indentation technique was chosen for interfacial parameters determination of the composite consisting from a borosilicate matrix reinforced by SiC fibres in the practical part of this work.
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