A review of possible application of the focussed ion beam by identification of phases in Al-casting alloys.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 20693270Krka's recognition of a secondary school reserach work: The aim of our research paper was to synthesize gold nanoparticles with required shapes and sizes from two precursors HAuCl4×3H2O(aq) and Au(CH3COO)3(aq) and also to find the effect of the precursor's chemical content and other technological parameters on the final properties of the gold nanoparticles. In order to carry out the synthesis, we had to design a modified horizontal USP apparatus, where the evaporation and reaction systems are separated. Besides this, we had to do the calibration of the apparatus's evaporation and reaction systems on the chosen working temperatures. In the experiments, we prepared the precursors with the required molar concentrations, pH values and volumes. Additionally, we determined some other technological parameters, such as flow of the transportation and reaction gases, temperatures in evaporation and reaction systems, the proper concentration of Au in the precursors, the membreane's oscillation frequency, and so on. Gold nanparticles were collected in deionized water in collection bottles. The investigations of the nanostructures of gold nanoparticles were conducted wiht SEM and TEM techniques, including EDS, DLS, UV-vis and ICP-MS analyses with the measurement of the zeta potential.
E.01 National awards
COBISS.SI-ID: 2366080Faculty of Mechanical Engineering, which is represented by members of our research group, is a co-organizer of the International Foundry Conference, which takes place each year in Portorož.
B.01 Organiser of a scientific meeting
Weldability of kinetically activated bainite (KAB) steels with the process of activated tungsten inert gas (A-TIG) welding was evaluated by means of mechanical testing and metallographic techniques. The latter were used to identify which phases formed, determine their volume fractions as well as formation mechanisms. Based on this information correlations were established between the welding parameters and the observed metallurgical phenomena. Particular emphasis was put on the morphology and amount of retained austenite and the local formation of martensite. It is shown that the mechanical properties of the weld are drastically improved when the retained austenite content is reduced below 10%. The high impact toughness of the weld with low content of retained austenite is also maintained after regeneration treatment at the same strength level as the base material.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 21910550In this paper, we present Nanotechnology, which is a branch of science and engineering focused on materials with at least one dimension below 100 nm. It involves the understanding of materials or processes on the "nano" scale. Nanomaterials, in the form of nanoparticles, nanotubes, nanopyramids, etc., have different properties compared to materials with ordinary dimensions. They have altered physical and chemical properties, which come from the large surface-to-volume ratio. This is reflected in their high surface activity and, because of this, they are useful in various fields (Electronics, Chemistry, Biotechnology, Medicine). Based on this fact, Nanotechnology is a broad term that covers many areas of science, research and technology. It is known today that industry (including Metallurgy) is focused mainly on miniaturization and how to realize the idea of the “science of small things” which is fostering major advances. According to this, we studied the existing literature, and we used the different sources with the aim to analyze the level of Nanotechnology development, and to show what the main Nanotechnology trends are in the near future. Consequently, we will present the adoption of Nanotechnology in the frame of the modeling and building of the smart new construction materials (steel, glasses, coatings, other products, etc.). The discussion will be focused on how it is possible to transfer Nanotechnology knowledge for sustainable use of construction materials for the achievement of sustainable developments in a circular economy.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 21701398