Slévárenské metody výroby porézních kovů se stochastickým uspořádáním vnitřních dutin

Abstract

The dissertation is focused on the possibilities of manufacturing of unique material, on which has been given a great deal of attention in many areas of human activity in recent years - metallic foam. This porous metal material has unique features that can be combined with each other. Thanks to these properties, metallic foams can be used in a wide range of sectors of human activity from vehicle construction, thermal engineering to medicine. However, the application potential of these materials is limited by the economic demands of their production technologies. In most cases, these are costly methods based on complicated procedures and the use of non-standard and expensive input materials. The presented work is devoted to the development of the production processes of metallic foams, which are based on conventional casting technologies. The use of standard casting processes and standard materials will make it possible to classify the range of metallic foams amongst affordable materials, thereby making full use of its application potential. Casting technology also offers the possibility of producing very complex parts, both with a solid surface layer and without it. The experimental part is focused on the development and subsequent optimization of the casting processes of cast metal foams with irregular internal cell structure. The whole experiment is then divided into two main directions of research: the development of a two-stage investment casting process using disposable evaporable polymeric pattern and the development of technology of infiltration of molten metal into mould cavity filled with precursors.