Browsing Ústav materiálových věd a inženýrství by Title

Now showing items 1-20 of 78

  • 2D MoTe2 nanosheets by atomic layer deposition: Excellent photo-electrocatalytic properties 

    Zazpe Mendioroz, Raúl; Sopha, Hanna Ingrid; Charvot, Jaroslav; Krumpolec, Richard; Rodriguez Pereira, Jhonatan; Michalička, Jan; Mistrík, Jan; Bača, Dominik; Motola, Martin; Bureš, Filip; Macák, Jan (Elsevier, 2021-06-01)
    Herein, the synthesis of MoTe2 nanosheets by means of Atomic Layer Deposition (ALD) is demonstrated for the first time. ALD enables tight control over the thickness and the composition of the deposited material, which are ...

  • An Ab Initio Study of Connections between Tensorial Elastic Properties and Chemical Bonds in Sigma5(210) Grain Boundaries in Ni3Si 

    Friák, Martin; Zelený, Martin; Všianská, Monika; Holec, David; Šob, Mojmír (2018-11-13)
    Using quantum-mechanical methods we calculate and analyze (tensorial) anisotropic elastic properties of the ground-state configurations of interface states associated with Sigma5(210) grain boundaries (GBs) in cubic ...

  • Ab initio study of Ni2MnGa under shear deformation 

    Zelený, Martin; Straka, Ladislav; Sozinov, Alexei (EDP Sciences, 2015-12-07)
    The effect of shear deformation on Ni2MnGa magnetic shape memory alloy has been investigated using ab initio electronic structure calculations. We used the projector-augmented wave method for the calculations of total ...

  • 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 ...

  • Ab initio study of properties of Co- and Cu- doped Ni-Mn-Ga alloys 

    Zelený, Martin; Sozinov, Alexei; Björkman, Torbjörn; Straka, Ladislav; Nieminen, Risto M. (Elsevier Ltd., 2015-11-06)
    The influence of Co and Cu doping on Ni-Mn-Ga alloy is investigated using the first-principles exact muffin-tin orbital method in combination with the coherent-potential approximation. The energy difference between the ...

  • 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 ...

  • 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 ...

  • Analysis of cyclic plastic response of heat resistant sanicro 25 steel at ambient and elevated temperatures 

    Polák, Jaroslav; Petráš, Roman; Heczko, Milan; Kruml, Tomáš; Chai, Guocai (Elsevier, 2014-06-25)
    Austenitic heat resistant steel Sanicro 25 developed for high temperature applications in power generation industry has been subjected to selected low cycle fatigue tests at ambient and at elevated temperature. Saturated ...

  • Atomic Layer Deposition of MoSe2 Using New Selenium Precursors 

    Zazpe Mendioroz, Raúl; Charvot, Jaroslav; Krumpolec, Richard; Hromádko, Luděk; Pavliňák, David; Dvořák, Filip; Knotek, Petr; Michalička, Jan; Přikryl, Jan; Ng, Siow Woon; Jelínková, Veronika; Bureš, Filip; Macák, Jan (Elsevier, 2020-05-01)
    Among the emerging 2D materials, transition metal chalcogenides are particularly encouraging as alternative semiconducting graphene-like nanomaterial. Recently, 2D MoSe2 has been gaining interest due to its intriguing ...

  • Automated calibration of advanced cyclic plasticity model parameters with sensitivity analysis for aluminium alloy 2024-T351 

    Peč, Michal; Šebek, František; Zapletal, Josef; Petruška, Jindřich; Hassan, Tasnim (SAGE Publications, 2019-03-18)
    The plasticity models in finite element codes are often not able to describe the cyclic plasticity phenomena satisfactorily. Developing a user-defined material model is a demanding process, challenging especially for ...

  • Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes 

    Kaspar, Pavel; Sobola, Dinara; Částková, Klára; Knápek, Alexandr; Burda, Daniel; Orudzhev, Farid; Dallaev, Rashid; Tofel, Pavel; Trčka, Tomáš; Grmela, Lubomír; Hadaš, Zdeněk (MDPI, 2020-11-24)
    Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and ...

  • Cold Sprayed Tungsten Armor for Tokamak First Wall 

    Čížek, Jan; Vilémová, Monika; Lukáč, František; Koller, Martin; Kondas, Jan; Singh, Reeti (MDPI, 2019-12-07)
    Harnessing nuclear fusion is a challenging task, in particular because of the demands put on the used materials. In tokamaks, future energy sources, the inner-most chambers are to be coated with dense coatings of W, or ...

  • Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting 

    Červinek, Ondřej; Werner, Benjamin; Koutný, Daniel; Vaverka, Ondřej; Pantělejev, Libor; Paloušek, David (MDPI, 2021-05-10)
    Additive manufacturing methods (AM) allow the production of complex-shaped lattice structures from a wide range of materials with enhanced mechanical properties, e.g., high strength to relative density ratio. These structures ...

  • Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids 

    Talimian, Ali; Pouchlý, Václav; Maca, Karel; Galusek, Dušan (MDPI, 2020-01-01)
    Highly dense magnesium aluminate spinel bodies are usually fabricated using pressure-assisted methods, such as spark plasma sintering (SPS), in the presence of lithium fluoride as a sintering aid. The present work investigates ...

  • Derivation of losses from impedance spectrum for contour modes of ceramic resonator 

    Erhart, Jiří; Bijalwan, Vijay; Solař, Filip; Maca, Karel (Taylor & Francis, 2020-04-02)
    Method of loss coefficients calculation from mechanical quality factors of transversal vibration modes is presented. Theoretical formulae are derived for the contour mode of thin square plate and width extensional mode of ...

  • 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 ...

  • 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 ...

  • Effect of heat treatment on mechanical properties and residual stresses in additively manufactured parts 

    Vaverka, Ondřej; Koutný, Daniel; Vrána, Radek; Pantělejev, Libor; Paloušek, David (Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018-05-14)
    Heat treatments commonly used for post-processing in additive manufacturing (AM) deal with relieving residual stresses. However, generally these treatments reduce strength properties of material such as yield stress (YS) ...

  • 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 ...

  • Effect of SiC particles on sinterability of Al-Zn-Mg-Cu P/M alloy 

    Rudianto, Haris; Jang, Gwang Joo; Yang, Sang Sun; Kim, Yong Jin; Dlouhý, Ivo (Institute of Metallurgy and Materials Science of Polish Academy of Sciences, Commitee on Metallurgy of Polish Academy of Sciences, 2015-05-10)
    Premix Al-5.5Zn-2.5Mg-0.5Cu alloy powder was analyzed as matrix in this research. Gas atomized powder Al-9Si with 20% volume fraction of SiC particles was used as reinforcement and added into the alloy with varied ...