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Polymeric biocompatible materials
Matlák, Jiří ; Stránský, Lubomír (referee) ; Molliková, Eva (advisor)
The aim of the bachelor’s thesis is polymeric biocompatible materials. In the first part the problematic of the biocompatible materials is discussed and the basic terms are explained. In the next part are described polymeric materials and their chemical composition, mechanical and chemical properties and examples of applications.
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Induced siphonage of air into the flowing fluid.
Matlák, Jiří ; Opravil, Tomáš (referee) ; Svěrák, Tomáš (advisor)
The aim of this diploma thesis is to deepen the knowledge in the field of drain liquid from vessel with free surface due to the effluent jet with defined profile. Formation of complete suction vortex is taken place gradually depending on the starting conditions. In the diploma thesis basic relations in liquids considering whirl are described and the types of vortex are divided on the bases of circulation intensity. In the experimental part of diploma thesis the possibilities of liquid level prediction are searched for, where the whirl is formed depending on the size of effluent jet.
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Surface treatment of selected steels using electron beam
Matlák, Jiří ; Jan, Vít (referee) ; Kouřil, Miloslav (advisor)
The aim of diploma thesis was preparation of hardened layer on three chosen types of materials with different alloying components content without surface melt by using electron beam technology. The influence of chosen process parameters was observed on the prepared hardened layers properties and shapes. In the first part of bibliographic search there are described electron beam properties, possibilities of his influencing and control. There is given example of complete set of electron beam are mentioned in the second part of theoretical research.
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Surface melting of graphitic cast iron for hard layer preparation and its optimization
Adam, Ondřej ; Matlák, Jiří (referee) ; Jan, Vít (advisor)
The aim of bachelor thesis is description of microstructures, which were created by surface melting of ductile iron by using electron beam technology. The first part of bibliographic search deals with carbon and its effect on iron. The second part is focused on the general knowledge about cast irons, especially on graphitic cast irons. The last part of bibliographic search deals with electron beam technology. The practical part presents a microstructures, which were created by surface melting. Temperature cycles of the different material areas are described based on microstructures. In the end of bachelor thesis, there are chosen remelted layer with the best parametres and surface melting technology is optimized.
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Surface Treatment Technology of Metallic Materials and its Applications using Electron Beam
Matlák, Jiří ; Dupák, Libor (referee) ; Houdková, Šárka (referee) ; Foret, Rudolf (advisor)
Fast deflection is one of the great advantages of an electron beam, making it possible to process a relatively large area at once and also to modify the distribution of the supplied energy. The dissertation deals with surface heat treatment with a focus on the effect of beam deflection on the process. Furthermore, the influence of processing speed and defocusing of the electron beam is studied. The principles of electron beam technology and the summary of surface heat treatment of various materials are presented in the literary part of the thesis. The experimental part is focused on the influence of process parameters on processing in the solid phase, carried out on steel 42CrMo4, and in in the liquid phase, carried out on alloy NiCrBSi. Especially changes in structure, hardness, shape of the processed area and wear resistance are evaluated on processed samples. The results are also evaluated from an energy perspective. Furthermore, an optimum combination of technological parameters is recommended for solid and liquid phase surface heat treatment.
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Interaction of adhesive tapes with surfaces of structural aeronautical alloys
Matlák, Jiří ; Tulka,, Jaromír (referee) ; Molliková, Eva (advisor)
This work deals with the selection of the most appropriate adhesive tape, which one perfectly adheres to the surface of sheet, which is made of dural coated with aluminum in 99,5 % purity, and to the dural angle without surface treatment. The tape is expected to be de-cohesion and disruption resistant during the application of complex coating system to protect the materials in air traffic against corrosion, and smoothly removal of the treated material without affecting the surface. Twelve types of commercially available adhesive tape were tested, and the most appropriate one was chosen after extensive experiment and photographic documentation.
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Surface Treatment Technology of Metallic Materials and its Applications using Electron Beam
Matlák, Jiří ; Dupák, Libor (referee) ; Houdková, Šárka (referee) ; Foret, Rudolf (advisor)
Fast deflection is one of the great advantages of an electron beam, making it possible to process a relatively large area at once and also to modify the distribution of the supplied energy. The dissertation deals with surface heat treatment with a focus on the effect of beam deflection on the process. Furthermore, the influence of processing speed and defocusing of the electron beam is studied. The principles of electron beam technology and the summary of surface heat treatment of various materials are presented in the literary part of the thesis. The experimental part is focused on the influence of process parameters on processing in the solid phase, carried out on steel 42CrMo4, and in in the liquid phase, carried out on alloy NiCrBSi. Especially changes in structure, hardness, shape of the processed area and wear resistance are evaluated on processed samples. The results are also evaluated from an energy perspective. Furthermore, an optimum combination of technological parameters is recommended for solid and liquid phase surface heat treatment.
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Surface melting of graphitic cast iron for hard layer preparation and its optimization
Adam, Ondřej ; Matlák, Jiří (referee) ; Jan, Vít (advisor)
The aim of bachelor thesis is description of microstructures, which were created by surface melting of ductile iron by using electron beam technology. The first part of bibliographic search deals with carbon and its effect on iron. The second part is focused on the general knowledge about cast irons, especially on graphitic cast irons. The last part of bibliographic search deals with electron beam technology. The practical part presents a microstructures, which were created by surface melting. Temperature cycles of the different material areas are described based on microstructures. In the end of bachelor thesis, there are chosen remelted layer with the best parametres and surface melting technology is optimized.
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Surface treatment of selected steels using electron beam
Matlák, Jiří ; Jan, Vít (referee) ; Kouřil, Miloslav (advisor)
The aim of diploma thesis was preparation of hardened layer on three chosen types of materials with different alloying components content without surface melt by using electron beam technology. The influence of chosen process parameters was observed on the prepared hardened layers properties and shapes. In the first part of bibliographic search there are described electron beam properties, possibilities of his influencing and control. There is given example of complete set of electron beam are mentioned in the second part of theoretical research.
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Induced siphonage of air into the flowing fluid.
Matlák, Jiří ; Opravil, Tomáš (referee) ; Svěrák, Tomáš (advisor)
The aim of this diploma thesis is to deepen the knowledge in the field of drain liquid from vessel with free surface due to the effluent jet with defined profile. Formation of complete suction vortex is taken place gradually depending on the starting conditions. In the diploma thesis basic relations in liquids considering whirl are described and the types of vortex are divided on the bases of circulation intensity. In the experimental part of diploma thesis the possibilities of liquid level prediction are searched for, where the whirl is formed depending on the size of effluent jet.
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