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RASULOVA Sitorabonu Institute of general & inorganic chemistry of Uzbekistan Academy of sciences, Tashkent, Uzbekistan, sitora_r91@mail.ru, vpguro@gmail.com
Co-authors:
GURO Vitaliy
IBRAGIMOVA Matluba
RAKHMATKARIYEVA Firuza
ADINAEV Khayitali
ERNAZAROV Umid
PARMONOV Gayrat
RAKHIMJONOV Zokhidjon
DOI: https://doi.org/10.37904/metal.2023.4734, 647-653
Abstract:
In the production of molybdenum compounds, JSC "Almalyk MMC" (Republic of Uzbekistan), for a long time used the method of nitric acid opening of raw material, replaced by the scheme of ammonia, then soda leaching of the cinder of the industrial product of molybdenum after oxidative roasting. In view of the improvement of technologies and equipment, there is an interest in environmentally friendly hydro-oxidative methods for their processing based on a strong oxidizer. [..]
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DRÁPALA Jaromír Advanced Metal Powders s.r.o., Kravaře, Czech Republic, EU, jar.drapala@amp.cz, reznar@metalpowders.cz, petlak@metalpowders.cz, halfar@metalpowders.cz
Co-authors:
REŽNAR Jiří
PETLÁK Daniel
HALFAR Martin
KRČIL Jan
MÁRA Vladimír
DOI: https://doi.org/10.37904/metal.2023.4735, 615-621
Abstract:
The aim of this work is to design and define technological procedures enabling the use of titanium scrap in the form of chips or piece of material as an input raw material for the production of spherical powders suitable for powder metallurgy or additive technologies. In this work, plasma metallurgy in the horizontal and vertical furnaces under a high purity atmosphere of argon (5N8 purity) was used for remelting the commercial titanium alloys. [..]
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RASULOVA Sitorabonu Institute of general & inorganic chemistry of Uzbekistan Academy of sciences, Tashkent, Uzbekistan
Co-authors:
GURO Vitaliy
IBRAGIMOVA Mavluda
ADINAEV Khayitali
KURBANOV Jakhongir
SAFAROV Edgorjon
FUZAYLOVA Feruza
PARDAEV Otabek
DOI: https://doi.org/10.37904/metal.2023.4736, 654-660
Abstract:
One of the types of technogenic metal-containing raw materials of Almalyk MMC JSC (Uzbekistan) is waste processing of molybdenite concentrate of previous years, based on nitric acid opening of sulfide concentrate: cakes stored in the tailings of the plant, allowing to some extent to increase the output of the plant's main products. In their composition, wt%: 4.1 Mo; 2.0 Fe, 3.87 S, 78.98 SiO2, 5.26 CaO, others 4.79 (including Au 20-25 g/t). [..]
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FOJTÍK Petr VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, petr.fojtik.st@vsb.cz, petra.vanova@vsb.cz
Co-authors:
VÁŇOVÁ Petra
DOI: https://doi.org/10.37904/metal.2023.4737, 629-634
Abstract:
The current automotive industry requires weight savings in the components used in the production of vehicles. At the same time, however, the demand for safety, high strength and fatigue life is increasing. [..]
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BARTÍKOVÁ Tereza Research Centre Řež, s.r.o., Husinec-Řež, Czech Republic, EU, tereza.bartikova@cvrez.cz
Co-authors:
PROCHÁZKA Jan
BERKA Jan
DOI: https://doi.org/10.37904/metal.2023.4738, 596-601
Abstract:
The corrosion coupons of 800H alloy with TIG weld filled with Nicrofer were exposed to impure helium in the High-Temperature Furnace (HTF) at 760 °C for 372, 1000 and 1500 hours. Impurities CH4, CO, H2 and H2O were chosen to simulate conditions in a High-Temperature Gas Reactor system (HTGR). [..]
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MACHÁČKOVÁ Adéla VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, adela.machackova@vsb.cz, silvie.brozova@vsb.cz, petra.vanova@vsb.cz, ales.sliva@vsb.cz, katerina.konecna@vsb.cz, grazyna.simha@vsb.cz
Co-authors:
BROŽOVÁ Silvie
VÁŇOVÁ Petra
SLÍVA Aleš
KONEČNÁ Kateřina
SIMHA MARTYNKOVÁ Grazyna
DOI: https://doi.org/10.37904/metal.2023.4739, 641-646
Abstract:
Nowadays, the use of waste materials from various technologies is increasingly discussed, not only in terms of environmental impact, but especially in terms of reducing primary raw materials wherever appropriate. One such use appears to be the reuse of material by recycling and subsequent processing of selected multi-metallic high temperature materials (in this case, for example, tungsten-based alloys/composites). [..]
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PACANA Andrzej Rzeszow University of Technology, Rzeszow, Poland, EU, app@prz.edu.pl
Co-authors:
CZERWIŃSKA Karolina
DWORNICKA Renata
DOI: https://doi.org/10.37904/metal.2023.4740, 622-628
Abstract:
The turbulent manufacturing market, and in particular the metallurgical industry, determines continuous improvement in the level of production efficiency and product quality. The aim of the study was to create a universal model enabling an assessment to be made of the impact of the modernity of aluminium casting machining technology on the quality of the final product and occupational safety in the company under study. [..]
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ČADA Radek VSB – Technical University of Ostrava, Ostrava, Czech Republic, EU, radek.cada@vsb.cz
Co-authors:
PEKTOR Tomáš
DOI: https://doi.org/10.37904/metal.2023.4741, 609-614
Abstract:
The article concerns the experimental determination of a suitable method of heat treatment of the shank of a hip arthroplasty, that is, an artificial replacement of the femoral head with the neck, to obtain the mechanical properties required by the customer. The hip replacement shank is manufactured from Ti-6Al-4V titanium alloy. [..]
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KOPELENT Michal VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, michal.kopelent@vsb.cz
Co-authors:
LOSERTOVÁ Monika
Adamczyk-Cieślak Bogusława
KONEČNÁ Kateřina
MATÝSEK Dalibor
HALO Tomáš
KLIMKOVÁ Kristýna
DOI: https://doi.org/10.37904/metal.2023.4742, 635-640
Abstract:
The aim of this work was to study the influence of thermal treatment of the NiTi alloy on the microstructure, fracture features, and phase composition. NiTi sheets with a thickness of 2 mm and a chemical composition of 56.3 wt% Ni and 43.7 wt% Ti were used for the experiment. [..]
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PACANA Andrzej Rzeszow University of Technology, Rzeszow, Poland, EU, app@prz.edu.pl, d.siwiec@prz.edu.pl
Co-authors:
SIWIEC Dominika
DWORNICKA Renata
DOI: https://doi.org/10.37904/metal.2023.4743, 697-702
Abstract:
Improving product sustainability is challenging in times of climate change. The research aimed to develop a method for sustainable product development in a circular economy. [..]
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LENORT Radim ŠKODA AUTO University, Mladá Boleslav, Czech Republic, EU, radim.lenort@savs.cz
Co-authors:
YAO Wenlong
HAN Weixue
DUAN Jingjing
DOI: https://doi.org/10.37904/metal.2023.4744, 709-717
Abstract:
In 2015, China fully launched the supply-side reform and carried out the work of reducing iron and steel production overcapacity. However, the China-United States trade war that began in 2018 and the global COVID-19 pandemic that began in 2020 have had a massive impact and uncertainty on the development of China and even the global economy, and the external business risks of enterprises have increased significantly. [..]
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DOHNAL Pavel VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, pavel.dohnal@vsb.cz
Co-authors:
DOHNAL Pavel Jr.
KAZANTSEV Dmitry
DOI: https://doi.org/10.37904/metal.2023.4745, 690-696
Abstract:
Artificial intelligence today has become a tool suitable not only for solving household and industrial problems, but also for optimizing and improving the efficiency of business processes. Using the example of the procurement of high-tech metallurgical products, the article demonstrates the areas of effective application of artificial intelligence in a multi-stage international project. [..]
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HUBATKA Slavomír TUKE - Technical University of Košice, Košice, Slovakia, EU, slavomir.hubatka@tuke.sk
Co-authors:
BUĽKO Branislav
BARICOVÁ Dana
DEMETER Peter
FOGARAŠ Lukáš
DEMETER Jaroslav
HRUBOVČÁKOVÁ Martina
DOI: https://doi.org/10.37904/metal.2023.4746, 703-708
Abstract:
The metallurgical sector is one of the main pillars of European industry. Steel is important not only for modern economies of developed countries but is an essential part of building infrastructure in developing countries, and thus in the coming decades, global demand for steel is expected to increase to meet growing social and economic needs. [..]
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KHOMIAKOVA Natalia Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic, EU, natalia.khomiakova@mff.cuni.cz
Co-authors:
SOCHA Aleš
SOLAŘ Pavel
CIESLAR Miroslav
AL-MUHKHRABI Yasmina
KRATOCHVÍL Jiří
KYLIÁN Ondřej
DOI: https://doi.org/10.37904/nanocon.2023.4747, 22-27
Abstract:
In this work, we consider the possibility of obtaining bimetallic W/Cu nanoparticles (NPs) by means of a magnetron-based gas aggregation source (GAS) of NPs. For this, a GAS of original construction was equipped with a segmental target consisting of two metals: tungsten and copper. [..]
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NIKITIN Daniil Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic, EU, daniil_nikitin@kmf.troja.mff.cuni.cz
Co-authors:
BILIAK Kateryna
LEMKE Jonathan
PROTSAK Mariia
PLESKUNOV Pavel
TOSCA Marco
ALI-OGLY Suren
ČERVENKOVÁ Veronika
ADEJUBE Blessing
BAJTOŠOVÁ Lucia
ČERNOCHOVÁ Zulfiya
PROKEŠ Jan
KŘIVKA Ivo
BIEDERMAN Hynek
FAUPEL Franz
VAHL Alexander
CHOUKOUROV Andrei
DOI: https://doi.org/10.37904/nanocon.2023.4748, 28-33
Abstract:
Neuromorphic engineering is a rapidly developing branch of science that aims to implement the unique attributes of biological neural networks in artificial devices. Most neuromorphic devices are based on the resistive switching effect, which involves changing the device’s conductivity in response to an external electric field. [..]
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FRIÁK Martin Institute of Physics of Materials, v.v.i., Czech Academy of Sciences, Brno, Czech Republic, EU, friak@ipm.cz, 500008@mail.muni.cz; roupcova@ipm.cz; mihalikova@ipm.cz;
Co-authors:
ČÍPEK Petr
PAVLŮ Jana
ROUPCOVÁ Pavla
MIHÁLIKOVÁ Ivana
MSALLAMOVÁ Šárka
MICHALCOVÁ Alena
DOI: https://doi.org/10.37904/nanocon.2023.4749, 15-21
Abstract:
Motivated by a decades-long controversy related to the crystal structure of Pb-supersaturated solid solutions of Pb in Sn, we have performed a quantum-mechanical study of these materials. Focusing on both bodycentred-tetragonal β-Sn and simple-hexagonal γ-Sn structures, we have computed properties of two alloys with the chemical composition Pb5Sn11, i.e. [..]
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OSMERA Pavel NCT Ltd., Praha, Czech Republic, EU, pavelosmera789@seznam.cz
DOI: https://doi.org/10.37904/nanocon.2023.4750, 34-39
Abstract:
Using the ring model of atoms and molecules, was revealed that there must be two types (type A and type B) of atoms that differ in the direction of rotation of individual rings (for type B, all rings rotate opposite to the directions of rotation for type A) but have the same structure. The rotations of protons and neutrons in atoms are given by a system that resembles a "cogwheel" in gear box. [..]
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BENDOVA Maria Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic, EU, bendova@vut.cz, mozalev@vut.cz
Co-authors:
PRASEK Jan
MOZALEV Alexander
DOI: https://doi.org/10.37904/nanocon.2023.4751, 9-14
Abstract:
Molybdenum oxides exhibit numerous electronic properties thanks to the ability of Mo to possess various oxidation states and coordinations. Molybdenum oxides are thus attractive for applications in energy storage, conversion, electrochromic, gas sensing, or superconducting devices. [..]
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RŮŽEK Vojtěch Department of Materials, Technical University of Liberec, Liberec, Czech Republic, EU, vojtech.ruzek@tul.cz
Co-authors:
SVOBODOVÁ Lucie
DOI: https://doi.org/10.37904/nanocon.2023.4752, 100-105
Abstract:
This paper investigates the antimicrobial effect of geopolymer composites with metal microparticles (metal powder). The geopolymer matrix was modified with silver, copper, or nickel microparticles in the concentration of 1, 2, 3, or 4 %. [..]
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USTA Canan ITU - Istanbul Technical University, Beyoglu, Istanbul, Turkiye, gurarslan@itu.edu.tr
Co-authors:
ATALAY Ozgur
GURARSLAN Alper
DOI: https://doi.org/10.37904/nanocon.2023.4753, 106-111
Abstract:
With the advancement of the wearable electronics, there is a growing demand for the textile electrodes due to their compliance and comfortableness to wear. Hence, a thorough investigation of suitable materials, fabrication methodologies and sensing elements needs to be developed. [..]
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