Wydział Inżynierii Metali i Informatyki Przemysłowej
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Item type:Article, Access status: Open Access , Development of PV panel recycling process enabling complete recyclability of end-of-life silicon photovoltaic panels(2025) Nalluri, Srinath; Kuśmierczyk, Filip; Leow, Shin Woei; Reindl, Thomas; Padhamnath, Pradeep; Kopyściański, Mateusz; Karbowniczek, Joanna; Kozieł, Tomasz
Wydział Inżynierii Metali i Informatyki PrzemysłowejThe cumulative PV panel waste is expected to reach ≈8 million tonnes by 2030 and ≈ 80 million tonnes by 2050. This presents an opportunity to pursue new avenues in terms of recycling and improving the circularity of the PV panels. In this work we present experimental results for recycling c-Si PV panels using recently developed electrohydraulic shock-wave fragmentation (EHF) of PV panels. The EHF process allows for the recovery of all materials used in the manufacturing of PV panels. We use different types of panels for the recycling process and analyse the material recoverability in each condition. Further, we analyse the effectiveness of chemical treatment in isolating metals from the silicon obtained from recycled c-Si PV panels, providing an opportunity of recovering high quality metal and silicon. The separation process allows for the high-quality material recovery and could potentially improve the economic feasibility of the overall recycling process.Item type:Article, Access status: Open Access , Thermally insulating mats based on electrospun fibers with bioinspired nano-groove surface structure(2025) Ura, Daniel Paweł; Szewczyk, Piotr K.; Parisi, Gregory; Osak, Andrzej; Puzio, Bartosz; Wrona, Jan; Kim, Il-Doo; Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki PrzemysłowejHeating and heat retention in buildings account for over 50 % of total energy costs, emphasizing the urgent need not only for advanced thermal insulation materials but also for nature-inspired design strategies to enhance energy efficiency and address the global energy crisis. In this study, we present a one-step fabrication method that improves both thermal insulation efficiency and the mechanical performance of polymer fiber mats. By leveraging bioinspired design, we successfully fabricate nanogroove fibers by precisely controlling humidity during in-situ electrospinning. This approach mimics the nanogroove topography of Old Man Cactus hair, enabling a simple yet effective method to regulate the nanoscale morphology of fibers. The resulting nanogroove fibers exhibit a substantial ~10 % reduction in surface temperature compared to conventional insulation coatings when applied to hot water pipes. Remarkably, our nanogroove fibrous coatings achieve 25 % higher energy savings per unit area and approximately 29 times higher per gram of material mass than commercial rubber insulation materials. This study highlights the critical role of nanoscale surface morphology engineering, particularly in the facile fabrication of nanogroove structures, in mitigating energy and heat loss during thermal transport processes. Based on the unique advantages of humidity-controlled polymer fiber architectures, this approach enables the development of flexible, high-performance thermal insulation materials, opening new avenues for versatile applications across various fields.Item type:Article, Access status: Open Access , Electrohydraulic fragmentation processing enabling separation and recovery of all components in end-of-life silicon photovoltaic panels(2025) Padhamnath, Pradeep; Nalluri, Srinath; Kuśmierczyk, Filip; Kopyściański, Mateusz; Karbowniczek, Joanna; Leow, Shin Woei; Reindl, Thomas
Wydział Inżynierii Metali i Informatyki PrzemysłowejThe exponential increased use of PV panels for energy production would also lead to enormous volumes of PV waste that need to be dealt with in an environmentally responsible manner. In this work we present experimental results for recycling crystalline silicon (c-Si) PV panels using recently developed electrohydraulic shock wave-based fragmentation of PV panels. The electrohydraulic fragmentation process allows for the efficient delamination of the modules and subsequent recovery of almost all valuable materials used in the manufacturing of PV panels, without thermally decomposing the polymers and eliminates creation of any toxic or hazardous waste during the process. We study the impact of the type of panel, size of the feed material and process duration on the quantity and quality of material recovered after the process.Item type:Interactive Resource, Access status: Metadata only , Podstawy baz danych z encyklopedią SQL(2009) Englert, Eryk
Wydział Inżynierii Metali i Informatyki Przemysłowej; Centrum e-Learningu i Innowacyjnej DydaktykiStrona internetowa poświęcona jest podstawowym pojęciom związanym z bazami danych. Znajdziesz na niej encyklopedię słów kluczowych języka SQL, służącego do konstruowania zapytań do baz danych. Jeśli nie miałeś do tej pory styczności z SQL możesz skorzystać z kategorii „pierwsze kroki”, w której zebrano podstawowe pojęcia, umożliwiające tworzenie m.in. tabeli w bazie danych, wprowadzanie nowych rekordów, aktualizację ich zawartości lub wyświetlanie. Dodatkowo na stronie znajdziesz informacje nt. modeli baz danych, postulatów Codda, kluczy, więzi, zależności, diagramów ERD, transakcji, czy normalizacji. Możesz również sprawdzić swoją aktualną wiedzę, rozwiązując test. Strona brała udział w konkursie <a href="https://notatki.cel.agh.edu.pl/">„Notatki w Internecie”.</a>Item type:Interactive Resource, Access status: Metadata only , Projektowanie systemów komputerowych(2009) Frączek, Beata
Wydział Inżynierii Metali i Informatyki Przemysłowej; Centrum e-Learningu i Innowacyjnej DydaktykiStrona internetowa zawiera informacje nt. projektowania systemów informatycznych. Omówione zostały wszystkie rodzaje diagramów UML – możliwe symbole i notacje. Przedstawiono wzorce projektowe oraz język ograniczeń OCL. Zamieszczono również informacje o programowaniu ekstremalnym, zarządzaniu projektami IT oraz kompletną dokumentację projektu Aukcji Internetowej, wykonanego w ramach ćwiczeń przedmiotowych. Strona brała udział w konkursie <a href="https://notatki.cel.agh.edu.pl/">„Notatki w Internecie”.</a>Item type:Doctoral Dissertation, Access status: Open Access , Wpływ mikrododatków i azotu na hartowność stali średniowęglowej z 2% Cr(2002-01-18) (Data obrony: 2007-09-24) Staśko, Renata
Wydział Inżynierii Metali i Informatyki PrzemysłowejIn work results of investigations of increased nitrogen content (in the rangę of 0.004÷0,04 %) and microalloying additions of V, Ti, Nb, Al on hardenability and austenite grain size of 0,4 %C, 2 %Cr are presented. Investigations were carried out on 26 laboratories melts. The hardenability of steels were carried out using austenitising temperature in the range 840÷1000°C. Using thermodynamic model the chemical composition of austenite as well as content of undissolved carbonitrides and nitrides were calculated and their effect on hardenability and austenite grain size was investigated. It was found, that in studied steel the increase of nitrogen content without microalloying additions decreases the hardenability of steel and increases susceptibility for austenite grain growth. However introduction microalloing additions at enlarged content of nitrogen permitted to get high hardenability at low grain of austenite at suitable temperature of hardening. Values of estimated ideal critical diameters were in the range 100 to 200 mm. Results of investigations permitted to affirm synergetic effect Mn and Cr onto hardenability of steel. Quantitative and qualitative analysis carbonitrides were carried out The effect of microalloying and nitrogen contents on mechanical properties of heat treated steel was investigated. Introduction of microalloing elements in steel with increased nitrogen content resulted in increasing tensile properties and decreasing impact strength of quenched and tempered steel.Item type:Article, Access status: Open Access , Modulating Surface Properties and Osteoblast Responses in Bone Regeneration via Positive and Negative Charges during Electrospinning of Poly(L‑lactide-co-ε-caprolactone) (PLCL) Scaffolds(2026) Marszalik, Katarzyna; Polak, Martyna; Berniak, Krzysztof; Knapczyk-Korczak, Joanna; Szewczyk, Piotr K.; Marzec, Mateusz M.; Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki PrzemysłowejThe global demand for faster and more effective bone regeneration calls for biomimetic scaffolds that actively guide cell behavior beyond providing structural support. Electrospinning offers unique opportunities to tailor scaffold properties, yet the influence of positive and negative voltage polarities during fabrication on cell−material interactions remains largely unexplored. Here, we investigate poly(L-lactide-co-ε-caprolactone) (PLCL) scaffolds, a statistical copolymer combining strength and elasticity, produced under positive (PLCL+) and negative (PLCL−) polarity. Both scaffold types display comparable morphologies and bulk chemistry. However, X-ray photoelectron spectroscopy reveals charge dependent surface chemistry, with PLCL− enriched in O C and O−C groups. Zeta potential results highlight pronounced voltage polarity effects under aqueous conditions at pH 7.5, showing −29.19 mV for PLCL+ and −34.77 mV for PLCL−. Biologically, both scaffolds support rapid osteoblast attachment, with robust filopodia and collagen type I deposition by day 14. Strikingly, PLCL+ scaffolds promote deeper cellular infiltration and broader cytoskeletal distribution, whereas PLCL− scaffolds enhance proliferation, but with a flatter cell morphology. These findings reveal that subtle, charge-driven surface chemical differences in random copolymer scaffolds profoundly modulate osteoblast behavior. This work identifies electrospinning voltage polarity as a powerful yet underutilized design parameter for engineering next-generation scaffolds for bone tissue regeneration.Item type:Article, Access status: Open Access , Direct electrospinning of short polymer fibers: factors affecting size and quality(2024) Ura, Daniel Paweł; Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki PrzemysłowejThe growing demand for lightweight and robust materials drives the development of polymer-based and fiber-reinforced composites. Here, using short fibers offers several advantages; however, currently employed methods for producing short fibers, such as homogenization, result in a wide dispersion of dimensions in the produced fibers, which is an undesirable effect in composite materials. In this study, electrospinning is used to produce polymer short fibers directly. This research highlights, for the first time, the differences in the electrospinning process dynamics between short and continuous fibers. By adjusting parameters: voltage and distance, we control dimensions of short fibers below 1 µm in diameter and around 4 µm in length to a few microns in diameter and approximately 14 µm in length. Direct electrospinning of short fibers offers significant advantages, including a narrow size distribution and reproducibility compared to chopped continuous fibers with homogenization.Item type:Article, Access status: Open Access , Realization of a Novel FeSiAlCuSn Multicomponent Alloy and Characterization of Intermetallic Phases Formed at Different Temperatures During Cooling(2025) Kuśmierczyk, Filip; Padhamnath, Pradeep; Kopyściański, Mateusz; Gondek, Łukasz; Migas, Piotr; Karbowniczek, Mirosław
Wydział Inżynierii Metali i Informatyki PrzemysłowejFerrosilicon (FeSi) is a commercially important material with multiple uses in metallurgical processes. Recently, in an attempt to reduce the carbon impact of the FeSi production process, researchers have proposed using recycled Si recovered from electronic waste in the production of FeSi. However, Si recovered from electronic waste usually contains Al, Cu, and Sn as impurities. Hence, FeSi alloys produced with recycled Si from electronic waste may contain all these elements in varying proportions. Al, Cu, and Sn have been explored as alloying elements to produce alloys with Fe. FeSiAl alloys have also been studied recently for their superior properties. In this work, a multicomponent FeSiAlCuSn alloy is produced, and the phases formed at different temperatures are analyzed using different phase identification techniques. We also analyze the hardness of the multicomponent alloy to find any deviation from the standard FeSi alloy without the additional alloying elements. Understanding the phases and the composition of such alloys may help design future multi-component or high-entropy alloys involving Fe, Si, Al, Cu, and Sn for specific applications.Item type:Doctoral Dissertation, Access status: Open Access , Numeryczne modelowanie zjawisk segregacji i pękania wlewka w końcowym etapie ciągłego odlewania stali(2008-05-26) (Data obrony: 2011) Rec, Tomasz
Wydział Inżynierii Metali i Informatyki PrzemysłowejThe main thesis of research was development numerical model of continuous casting process with mechanical soft reduction process. The central segregation occurs in continuously cast ingot influence on mechanical properties, chemical composition and microstructure of final products. Formation and evolution of central segregation in continuously cast ingot dependent on many factors (steel chemistry, casting speed, cooling regime, machine geometry). The researches presented in literature show that segregation in continuous ingot can be decrease by using soft reduction process at the end stage of continuous casting process. Efficiency of soft reduction dependents on the values reduction, contents of liquid phase in center of ingot moreover parameters of continuous casting process. Moreover, the soft reduction process to change the stress-strain state in the slab and it can cause formation cracks on slab surface. The development of optimal parameters of soft reduction process is difficult task. The purpose of this work was develop a numerical FEM model of continuous casting process with soft reduction process and optimization of parameters of soft reduction for industrial example. The proposed numerical model of slabs casting with soft reduction technology takes into ac-count the processes of crystallization, thermal stress, diffusion, macrosegregation and mechanical deformation. Base on developed model continuous casting process a series of computer simulation were performer for the industrial conditions.