• Case Study of Polyvinylidene Fluoride Doping by Carbon Nanotubes 

  Kaspar, Pavel; Sobola, Dinara; Částková, Klára; Dallaev, Rashid; Šťastná, Eva; Sedlák, Petr; Knápek, Alexandr; Trčka, Tomáš; Holcman, Vladimír (MDPI, 2021-03-15)

  Modern material science often makes use of polyvinylidene fluoride thin films because of various properties, like a high thermal and chemical stability, or a ferroelectric, pyroelectric and piezoelectric activity. Fibers ...

• Structure Tuning and Electrical Properties of Mixed PVDF and Nylon Nanofibers 

  Černohorský, Petr; Pisarenko, Tatiana; Papež, Nikola; Sobola, Dinara; Ţălu, Ştefan; Částková, Klára; Kaštyl, Jaroslav; Macků, Robert; Škarvada, Pavel; Sedlák, Petr (MDPI, 2021-10-15)

  The paper specifies the electrostatic spinning process of specific polymeric materials, such as polyvinylidene fluoride (PVDF), polyamide-6 (PA6, Nylon-6) and their combination PVDF/PA6. By combining nanofibers from two ...

• Preserving Metamagnetism in Self-Assembled FeRh Nanomagnets 

  Motyčková, Lucie; Arregi Uribeetxebarria, Jon Ander; Staňo, Michal; Průša, Stanislav; Částková, Klára; Uhlíř, Vojtěch (AMER CHEMICAL SOC, 2023-02-15)

  Preparing and exploiting phase-change materials in the nanoscale form is an ongoing challenge for advanced material research. A common lasting obstacle is preserving the desired functionality present in the bulk form. Here, ...

• Micromechanical aspects of the effect of temperature and local plastic strain magnitude on the fracture tughness of ferrite steels 

  Kotrechko, Sergiy; Kozák, Vladislav; Zatsarna, Oleksandra; Zimina, Galina; Stetsenko, Nataliya; Dlouhý, Ivo (Elsevier, 2023-01-18)

  The paper shows that the influence of plastic strain and temperature on the rate of crack nuclei (CN) formation is a crucial factor controlling the shape of the temperature dependence of fracture toughness and its scatter ...

• Electron beam welding of AlCoCrFeNi2.1 high entropy alloy to EN 1.4301 austenitic steel 

  Rončák, Ján; Adam, Ondřej; Zobač, Martin (IOP Publishing, 2023-02-21)

  Eutectic high-entropy alloys (EHEA), also known as multi-principle component alloys (MPCA), are a group of materials exhibiting promising mechanical properties. The principle of the alloy is to achieve sufficient ductility ...

• Transparent LiOH-doped magnesium aluminate spinel produced by spark plasma sintering: Effects of heating rate and dopant concentration 

  Pouchlý, Václav; Talimian, Ali; Kaštyl, Jaroslav; Chvíla, Martin; Ščasnovič, Erik; Beltran, Ana Maria; Lozano , Juan Gabriel; Galusek, Dušan (Elsevier, 2023-07-01)

  The effects of LiOH doping of magnesium aluminate spinel powders and various Spark Plasma Sintering (SPS) schedules on densification behavior and final transparency of polycrystalline magnesium aluminate spinel were studied. ...

• Processing of AZ91D Magnesium Alloy by Laser Powder Bed Fusion 

  Nopová, Klára; Jaroš, Jan; Červinek, Ondřej; Pantělejev, Libor; Gneiger, Stefan; Senck, Sascha; Koutný, Daniel (MDPI, 2023-01-20)

  Magnesium alloys are perspective materials for use in transportation, aerospace and medical industries, mainly because of their good load-to-weight ratio, biocompatibility and biodegradability. For the effective production ...

• Additive manufacturing capabilities for heat switch technology: Key challenges & knowledge gaps 

  Mašek, Jakub; Löffelmann, František; Popela, Robert; Kubík, Petr; Šebek, František; Koutný, Daniel; Malý, Martin; Pantělejev, Libor; Pambaguian, Laurent (EUCASS association, 2022-09-28)

  The paper is to provide an overview of the key challenges and knowledge gaps in additive manufacturing of metals applied to two parts of a novel heat switch technology – a Baseplate and a Flexible thermal structure. Additive ...

• Impact of interstitial elements on the stacking fault energy of an equiatomic CoCrNi medium entropy alloy: theory and experiments 

  Moravčík, Igor; Zelený, Martin; Dlouhý, Antonín; Hadraba, Hynek; Moravčíková de Almeida Gouvea, Larissa; Papež, Pavel; Fikar, Ondřej; Dlouhý, Ivo; Raabe, Dierk; Li, Zhiming (Taylor & Francis, 2022-08-30)

  We investigated the effects of interstitial N and C on the stacking fault energy (SFE) of an equiatomic CoCrNi medium entropy alloy. Results of computer modeling were compared to tensile deformation and electron microscopy ...

• Effect of Preheating on the Residual Stress and Material Properties of Inconel 939 Processed by Laser Powder Bed Fusion 

  Malý, Martin; Nopová, Klára; Klakurková, Lenka; Adam, Ondřej; Pantělejev, Libor; Koutný, Daniel (MDPI, 2022-09-13)

  One of the main limitations of laser powder bed fusion technology is the residual stress (RS) introduced into the material by the local heating of the laser beam. RS restricts the processability of some materials and causes ...

• Deviations of the SLM produced Lattice Structures and Their Influence on Mechanical properties 

  Vrána, Radek; Koutecký, Tomáš; Červinek, Ondřej; Zikmund, Tomáš; Pantělejev, Libor; Kaiser, Jozef; Koutný, Daniel (MDPI, 2022-04-26)

  Selective laser melting (SLM) is an additive manufacturing technology suitable for producing cellular lattice structures using fine metal powder and a laser beam. However, the shape and dimensional deviations occur on the ...

• Triboelectric Response of Electrospun Stratified PVDF and PA Structures 

  Tofel, Pavel; Částková, Klára; Říha, David; Sobola, Dinara; Papež, Nikola; Kaštyl, Jaroslav; Talu, Stefan; Hadaš, Zdeněk (MDPI, 2022-01-22)

  Utilizing the triboelectric effect of the fibrous structure, a very low cost and straightforward sensor or an energy harvester can be obtained. A device of this kind can be flexible and, moreover, it can exhibit a better ...

• High-energy ball milling and spark plasma sintering of molybdenum - lanthanum oxide (Mo-La2O3) and molybdenum - lanthanum zirconate (Mo-La2Zr2O7) composite powders 

  Čelko, Ladislav; Tkachenko, Serhii; Casas Luna, Mariano; Dyčková, Lucie; Bednaříková, Vendula; Remešová, Michaela; Komarov, Pavel; Deák, Andréa; Baláž, Matej; Crawford, Deborah E.; Díaz de la Torre, Sebastian; Bodoki, Ede; Cihlář, Jaroslav (Elsevier, 2022-01-01)

  The current study is focused on the preparation of Mo-10 vol%La2O3 and Mo-10 vol% La2Zr2O7 composite powders via low- and high-energy ball milling approaches as potential candidates for near-future high-temperature structural ...

• TiO2 nanotube layers decorated by titania nanoparticles as anodes for Li-ion microbatteries 

  Sopha, Hanna Ingrid; Ghigo, Clement; Ng, Siow Woon; Alijani, Mahnaz; Hromádko, Luděk; Michalička, Jan; Djenizian, Thierry; Macák, Jan (Elsevier, 2022-01-15)

  In this work, the utilization of TiO2 nanotube (TNT) layers decorated with TiO2 nanoparticles (NPs) as anodes in Li-ion microbatteries is reported for the first time. Such TiO2 NPs decorated TNT layers possess an increased ...

• An Ab Initio Study of Pressure-Induced Changes of Magnetism in Austenitic Stoichiometric Ni2MnSn 

  Friák, Martin; Mazalová, Martina; Turek, Ilja; Zemanová, Adéla; Kaštil, Jiří; Kamarád, Jiří; Míšek, Martin; Arnold, Zdeněk; Schneeweiss, Oldřich; Všianská, Monika; Zelený, Martin; Kroupa, Aleš; Pavlů, Jana; Šob, Mojmír (MDPI, 2021-01-22)

  We have performed a quantum-mechanical study of a series of stoichiometric Ni2MnSn structures focusing on pressure-induced changes in their magnetic properties. Motivated by the facts that (i) our calculations give the ...

• Effect of electron localization in theoretical design of Ni-Mn-Ga based magnetic shape memory alloys 

  Zelený, Martin; Sedlák, Petr; Heczko, Oleg; Seiner, Hanuš; Veřtát, Petr; Obata, Masao; Kotani, Takao; Oda, Tatsuki; Straka, Ladislav (Elsevier, 2021-06-19)

  The precise determination of the stability of different martensitic phases is an essential task in the successful design of (magnetic) shape memory alloys. We evaluate the effect of electron delocalization correction on ...

• ALD coating of centrifugally spun polymeric fibers and postannealing: case study for nanotubular TiO2 photocatalyst 

  Říhová, Martina; Yurkevich, Oksana; Motola, Martin; Hromádko, Luděk; Spotz, Zdeněk; Zazpe Mendioroz, Raúl; Knez, Mato; Macák, Jan (Royal Society of Chemistry, 2021-08-07)

  This work describes the synthesis of highly photocatalytically active TiO2 tubes (TiTBs) by combining centrifugal spinning and atomic layer deposition (ALD). Poly(vinyl pyrrolidone) (PVP) fibers were first produced by ...

• Microstructure evolution of Cu-Fe-based immiscible alloys prepared by powder metallurgy 

  Adam, Ondřej; Jan, Vít (IOP Publishing, 2021-09-22)

  The work is focused on the preparation of bulk immiscible Cu-Fe-based alloys by powder metallurgy. Three samples with chemical composition Cu70Fe30, Cu70Fe15Co15, and Cu50Fe25Co25 were prepared by mechanical alloying and ...

• Stage I fatigue cracking in MAR-M 247 superalloy at elevated temperatures 

  Šmíd, Miroslav; Hutař, Pavel; Horník, Vít; Hrbáček, Karel; Kunz, Ludvík (Elsevier, 2016-07-21)

  Nickel base superalloys exhibit fatigue fracture behavior with features of brittle-like cleavage cracking under high cycle fatigue loading at temperatures up to approximately 800 °C. This specific fracture behavior was ...

• Microstructure modification of CGDS and HVOF sprayed CoNiCrAlY bond coat remelted by electron beam 

  Krajňáková, Petra; Čížek, Jan; Čupera, Jan; Hasegawa, Makoto; Dlouhý, Ivo (Elsevier, 2016-05-06)

  In the present work two techniques are combined to optimize bond coat properties before thermal barrier coating (TBC) application, the cold gas dynamic spraying (CGDS) and electron beam remelting (EB). Results of the work ...

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