Open Access Conference Proceedings

Abstract: Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. The selective flotation of chromite minerals of any chromite ore have some difficulties due to dissolved cations from gangue minerals. [..] Read more

Abstract: In this study were investigated the surface morphology, chemical content and phase composition of two sorts of copper cakes from zinc plant of KCM-Plovdiv, Bulgaria. The aim of this research is the utilization of valuable copper from copper cakes and reduction the amounts of the specific secondary wastes from hydrometallurgy plants. [..] Read more

Abstract: The following article is a continuation of research that examines the problem of utilization of phosphorus-containing sludge that is produced in the phosphorus industry. Using models for coagulation and coalescence of the sludge, both within its hydraulic mix and following sedimentation in a ribbon mixer apparatus, very important parameters were identified. [..] Read more

Abstract: The MgYNdScMn alloy was squeeze-cast under a protective atmosphere. Precipitation reactions were studied by differential scanning calorimetry. [..] Read more

Abstract: The most common allotropic modification of tin is white tin (β tin), which is thermodynamically stable from 13.2 °C to 161 °C. The allotropic modification grey tin (α tin) is thermodynamically stable below 13.2 °C. [..] Read more

Abstract: The iron aluminides can be applied in many engineering applications due to the wide range of their positive properties. One possibility of their use could be for machine components working at elevated temperatures in corrosive environments. [..] Read more

Abstract: This study presents results of high-cycle fatigue measurements of cast polycrystalline nickel superalloy Inconel 713LC and the analysis of acoustic emission response of this material. Inconel 713LC is usually used for gas turbines in aerospace and power industry. [..] Read more

Abstract: Polycrystalline nickel-base superalloy MAR-M247 is used for high temperature applications requiring excellent combination of fatigue properties, creep resistance and surface stability. These superior high temperature characteristics derive from the microstructure which habitually consists of face centred cubic matrix γ and precipitate γ´ (L12 type ordered structure). In the present work, the high temperature low cycle fatigue behaviour of cast nickel-base superalloy MAR-M247 in as received condition and in hot isostatically pressed (HIP) condition was studied. [..] Read more

Abstract: Report deals with the occurrence of copper and copper oxides in the Heating Plant heat-transfer circuit, particularly in the steam-water system of high pressure steam boilers. Boilers produce high-pressure superheated steam, which is used for cogeneration of heat and electricity. [..] Read more

Abstract: Since the discovery of porous metallic materials numerous methods of production have been developed. Porous metallic materials can be made from liquid metal, from powdered metal, metal vapours, or from metal ions. [..] Read more

Abstract: Porous metallic materials have generally an extensive potential for various applications. It is therefore necessary to know the basic properties of these unconventional materials. [..] Read more

Abstract: Metallic nanoparticles are considered as very prospective material due to unique properties and wide range of possible applications. In this work, our attention was focused on preparation of silver nanoparticles by selective leaching of aluminium matrix under various conditions. [..] Read more

Abstract: The study of deformation distribution in tensile test specimens of IN 738 LC alloy was performed before and after hydrogenation. Tensile specimens were submitted to hot isostatic pressing before hydrogenation and tensile test. [..] Read more

Abstract: Annealing at ambient temperature connected with a substantial degree of strengthening (natural ageing) is well known and investigated in Al-based alloys. Clustering of solute atoms at room temperature proven by atom probe tomography is believed to be assisted by vacancies quenched in material from high annealing temperature. [..] Read more

Abstract: The aim of the experiment was to study the technique of production of porous metal foams by reduction of metal oxides during sintering. The foams were produced by powder metallurgy. [..] Read more

Abstract: Samples of Ni3Al based alloys with hypo-stoichiometric composition Ni-24Al and Ni-22Al were directionally solidified at rates of 50 and 70 mm/h. The directionally solidified samples were used for creep tests at 900 °C. Testing was performed under a load of 200 MPa in an argon atmosphere. [..] Read more

Abstract: X-ray diffraction analysis and simulation of X-ray diffraction patterns are used to study the phase composition of sintered (Nd, Pr, Dy)-Fe-B magnets prepared from powder mixtures with 2 % DyH2 addition. After optimum heat treatment, which includes 1-h holding at 500 C followed by quenching in gaseous nitrogen, the magnets exhibit high magnetic properties: Br = 1.29 T, jHc = 1309 kA/m, Hk = 1220 kA/m, (BH)max = 322 kJ/m3. [..] Read more

Abstract: Aluminium alloys are frequently used structural materials. Their properties can be affected by manufacturing method. [..] Read more

Abstract: In this study Al-Ni alloys with nickel contents between 1-5 wt-% were cast. Microstructures of the specimens were investigated under optical microscope and scanning electron microscope. [..] Read more

Abstract: Ti-3Al-8V-6Cr-4Mo-4Zr alloy (Grade 19) belongs to the group of beta-titanium alloys. Among the important properties of this alloy good ductility and high strength can be mentioned. [..] Read more