1. Ingenious architecture and coloration generation in enamel of Rodent teethVesna Šrot, Sophia Houari, Gregor Kapun, Birgit Bußmann, Felicitas Predel, Boštjan Pokorny, Elena Bužan, Ute Salzberger, Bernhard Fenk, Marion Kelsch, Peter van Aken, 2024, izvirni znanstveni članek Povzetek: Teeth exemplify architectures comprising an interplay of inorganic and organic constituents, resulting in sophisticated natural composites. Rodents (Rodentia) showcase extraordinary adaptations, with their continuously growing incisors surpassing human teeth in functional and structural optimizations. In this study, employing state-of-the-art direct atomic-scale imaging and nanoscale spectroscopies, we present compelling evidence that the release of material from ameloblasts and the subsequent formation of iron-rich enamel and surface layers in the constantly growing incisors of rodents are complex orchestrated processes, intricately regulated and independent of environmental factors. The synergistic fusion of three-dimensional tomography and imaging techniques of etched rodent́s enamel unveils a direct correlation between the presence of pockets infused with ferrihydrite-like material and the acid resistant properties exhibited by the iron-rich enamel, fortifying it as an efficient protective shield. Moreover, observations using optical microscopy shed light on the role of iron-rich enamel as a microstructural element that acts as a path for color transmission, although the native color remains indistinguishable from that of regular enamel, challenging the prevailing paradigms. The redefinition of “pigmented enamel” to encompass ferrihydrite-like infusion in rodent incisors reshapes our perception of incisor microstructure and color generation. The functional significance of acid-resistant iron-rich enamel and the understanding of the underlying coloration mechanism in rodent incisors have far-reaching implications for human health, development of potentially groundbreaking dental materials, and restorative dentistry. These findings enable the creation of an entirely different class of dental biomaterials with enhanced properties, inspired by the ingenious designs found in nature. Ključne besede: teeth microstructure, ameloblasts, ferritin, Fe-rich enamel, tomography, rodent Objavljeno v DiRROS: 26.04.2024; Ogledov: 49; Prenosov: 17 Celotno besedilo (3,33 MB) Gradivo ima več datotek! Več... |
2. Bioresorbability dependence on microstructure of additivelly- manufactured and conventionally-produced Fe-Mn alloysMatjaž Godec, Jakob Kraner, Danijela Anica Skobir Balantič, Irena Paulin, Damjana Drobne, Veno Kononenko, Aleksandra Kocijan, Paul J. McGuiness, Črtomir Donik, 2024, zaključena znanstvena zbirka raziskovalnih podatkov Povzetek: The dataset supports the results shown in the tables and figures in the article entitled “Bioresorbability Dependence on Microstructure of Additivelly-Manufactured and Conventionally-Produced Fe-Mn Alloys” (doi.org/10.1016/j.jmrt.2024.04.097). It contains measurements of corrosion resistance of Fe-Mn samples, phase analysis of samples A, B and C, surface and depth profiling XPS, EDS measurements of a cross-section of Fe-Mn powder particles and viability measurements results. Ključne besede: Fe-Mn alloy, laser powder bed fusion, bioresorbable, microstructure, corrosion behaviour, biocompatibility Objavljeno v DiRROS: 12.04.2024; Ogledov: 170; Prenosov: 73 Celotno besedilo (2,55 MB) Gradivo ima več datotek! Več... |
3. The effect of heat treatment on the interface of 155 PH martensitic stainless steel and SAF 2507 duplex steel in functionally graded AM componentsMartina Koukolíková, Pavel Podaný, Sylwia Rzepa, Michal Brázda, Aleksandra Kocijan, 2023, izvirni znanstveni članek Povzetek: Multi-material components, also known as functionally graded materials (FGMs), are innovative materials that possess unique properties due to their composition and have many potential applications in engineering and science. The effect of the heat treatment (HT) of functionally graded materials 15–5 precipitation-hardened (PH) martensitic steel and SAF 2507 duplex stainless steel (and the opposite order of deposition, i.e. SAF 2507 first followed by 15–5 PH stainless steel) on the interface microstructures was systematically investigated in the presented research. The choice of HT followed the trend of optimum post-processing for the individual alloys. A significant modification in the interface microstructure, characterized in the microstructural transition zone (MTZ) formed above the fusion line. Mechanical properties by miniaturized testing method including hardness measurement characterized both types of interfaces. The sequence of the materials’ application did not have a significant effect on their final mechanical tensile properties in the heat-treated states. Nevertheless, the microstructural change at the MTZ led to drop in the hardness at the interface. The research presents heat-treated FGMs in a horizontal configuration to form a high-quality metallurgical joint between heterogeneous materials manufactured by powder-based directed energy deposition method. Ključne besede: heat treatment, additive manufacturing, martensitic stainless steel, duplex steel, microstructure, mechanical properties Objavljeno v DiRROS: 04.04.2024; Ogledov: 84; Prenosov: 22 Povezava na datoteko |
4. Evolution of microstructure and embrittlement during the tempering process in SiCrCu medium-carbon steelsPavel Salvetr, Aleksandr Gokhman, Črtomir Donik, Zbyšek Nový, Jakub Kotous, Matjaž Godec, 2023, izvirni znanstveni članek Ključne besede: medium-carbon steel, tempering martensite embrittlement, microstructure, mechanical properties Objavljeno v DiRROS: 08.03.2024; Ogledov: 104; Prenosov: 68 Celotno besedilo (4,44 MB) Gradivo ima več datotek! Več... |
5. Understanding carbide evolution and surface chemistry during deep cryogenic treatment in high-alloyed ferrous alloyPatricia Jovičević Klug, Levi Tegg, Matic Klug Jovičević, Rahul Parmar, Matteo Amati, Luca Gregoratti, László Almásy, Julie M. Cairney, Bojan Podgornik, 2023, izvirni znanstveni članek Ključne besede: cryogenic temperature, surface chemistry, microstructure, atom probe tomography (APT), scanning photoelectron microscopy (SPEM), small angle neutron scattering (SANS) Objavljeno v DiRROS: 08.03.2024; Ogledov: 98; Prenosov: 94 Celotno besedilo (20,08 MB) Gradivo ima več datotek! Več... |
6. In vitro and in vivo degradation behavior of Mg-0.45Zn-0.45Ca (ZX00) screws for orthopedic applicationsDiana C. Martinez, Anna Dobkowska, Romy Marek, Hanna Ćwieka, Jakub Jaroszewicz, T. Plociński, Črtomir Donik, Heike Helmholz, Bérengère Luthringer-Feyerabend, Berit Zeller-Plumhoff, Regine Willumeit-Römer, Wojciech Święszkowski, 2023, izvirni znanstveni članek Ključne besede: magnesium alloys, biodegradable implants, microstructure, electron microscopy, corrosion layers Objavljeno v DiRROS: 08.03.2024; Ogledov: 107; Prenosov: 104 Celotno besedilo (23,65 MB) Gradivo ima več datotek! Več... |
7. Insights into microstructural evolution of tungsten-tungsten carbide plasma facing composite materials prepared by field assisted sintering techniqueAljaž Iveković, Matej Kocen, Petra Jenuš, Anže Abram, Črtomir Donik, Saša Novak, 2023, izvirni znanstveni članek Ključne besede: tungsten, tungsten carbide, interface, microstructure, fusion energy Objavljeno v DiRROS: 07.02.2024; Ogledov: 140; Prenosov: 78 Celotno besedilo (14,95 MB) Gradivo ima več datotek! Več... |
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9. Possibilities for improvement of mechanical properties of high-strength medium-carbon SiCr steelsPavel Salvetr, Jakub Kotous, Črtomir Donik, Aleksandr Gokhman, Zbyšek Nový, 2023, izvirni znanstveni članek Ključne besede: spring steel, 54SiCr6 steel, microstructure, mechanical properties Objavljeno v DiRROS: 02.02.2024; Ogledov: 219; Prenosov: 76 Celotno besedilo (1,44 MB) Gradivo ima več datotek! Več... |
10. Austenite reversion suppression with deep cryogenic treatment : a novel pathway towards 3rd generation advanced high-strength steelsPatricia Jovičević Klug, Matic Klug Jovičević, Lars Thormählen, Jeffrey McCord, Michael Rohwerder, Matjaž Godec, Bojan Podgornik, 2023, izvirni znanstveni članek Ključne besede: Martensitic stainless steel, deep cryogenic treatment, microstructure, mechanical properties, microstructural transformations, phase transformation Objavljeno v DiRROS: 02.02.2024; Ogledov: 165; Prenosov: 85 Celotno besedilo (13,70 MB) Gradivo ima več datotek! Več... |