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The study of recycling non-ferrous metals in the EU and the Czech Republic
Rákosník, Vítězslav ; Benešová, Libuše (advisor) ; Tonika, Jaroslav (referee)
Overall, recycling entails both advantages and disadvantages. The major advantage is saving large amounts of energy in recycling compared to primary raw material, which is another big plus for recycling non-ferrous metals - save primary raw material. The Czech Republic and many other countries are largely dependent on imports of certain raw materials (aluminum, lead, copper, etc.) or just on mentioned recycling. Nowadays, increase in the number of electrical devices (computers, mobile telephones, tablets, etc.), is recycling of scrap metal very important, because in each device occurs a certain amount of non- ferrous metals, noble metals, which can be used again. In this work will be described commonly used non-ferrous metals (properties, inventories, recovery and recycling). Theses also deal with e-waste and its management. Key words: non-ferrous metals, recycling, utilization
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Technology of Galvanic Anodization of Non-ferrous Materials and Its Alloys
Remešová, Michaela ; Hadraba,, Hynek (referee) ; Čelko, Ladislav (advisor)
The thesis is focused on the theoretical description of the technology of anodizing of aluminium, magnesium, zinc and their alloys. In this work, methods for formation of oxide layers and the used chemical processes are described in detail. The experimental part of this work deals with formation of oxide layers on aluminium, magnesium and zinc of high purity under different conditions. Oxide layers of different thicknesses were created on all three experimental materials. Aluminium was anodized in a bath of 10% H2SO4, magnesium in the bath of 1 mol/dm3 NaOH, and zinc in the bath of 0.5 mol/dm3 NaOH. Processes were carried out at laboratory temperature. On the aluminium, continuous oxide layer was formed. Furthermore rule "312" was verified, that can indicatively be used for calculating the thickness of the resulting oxide layer on the aluminium. When using lower current of 0.08 and 0.2 A for magnesium anodizing, dark colored layer was created comparing to higher current of 0.5 A. More rough appearance of the oxide layer was produced with increasing voltage. Further, it was observed for magnesium that the resulting layer comprises of two sublayers. For zinc, black colored layer was created when the voltage 20 V and current from 0.4 to 0.5 A were used. In the layer, two sublayers were also observed. For lower voltage and current (0.05 A, 0.17 V), formation of the oxide layer on the zinc does not occur, but the crystallographic etching was observed.
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Mechanical properties of titanium alloys
Prudíková, Alena ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis was created in a form of literary search and it summarizes the basic information of Titanium and its alloys. The most significant features, such as its position in Periodic Table of the Elements, allotropic modifications and their crystal lattices, chemical or physical qualities, are mentioned in the first chapters. The attention was also paid to both the mechanical and the technological qualities of titanium as such, including the effect of impurities that may be very significant. General and summarized information about the history of titanium, as well as current directions in the development of its alloys are discussed in chapter 1.3. As a following, the information about production and the methods used during the production are discussed in chapter 2. Distinct part of the thesis depicts the partition of concrete titanium alloys and the heat treatment of them. The TiAl6V4 alloy was described in details, since it is the most widely used, therefore the most often produced titanium alloy.
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The History of Non-Ferrous Alloys in Aircraft Industry
Dušek, Přemysl ; Gejdoš, Pavel (referee) ; Němec, Karel (advisor)
Main part bachelor work be concerned common description magnesium alloys,compare with aluminium alloys,benefits or disadvantages magnesium alloy,describe groups of magnesium alloys after alloying component,technological properties and heat treatment.Next part my bachelor work includes application magnesium alloys in aircraft constructions from second worl war in Germany to present day.
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Forming technologies of non-ferrous materials
Zuhla, Michal ; Dvořák, Milan (referee) ; Císařová, Michaela (advisor)
This work is focused on the surface forming, in particular, non-ferrous metals. There are described methods of cutting, drawing and bending. For each of these methods are listed and summarized the issues. There are also given individual production technologies cutting, drawing and bending, along with examples of products and their use. The work is complemented with an overview of the most important non-ferrous metals. For these metals are described their properties, suitability for molding and their alloys.
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