• 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 ...

• Electron Localizations in Alloy Exhibiting Nanotwinning 

  Zelený, Martin; Zemen, Jan; Veis, Martin; Král, Daniel; Straka, Ladislav; Heczko, Oleg (MDPI, 2019-09-05)

  In present work we have used firstprinciples calculations based on density functional theory (DFT) to simulate magneto-optical (MO) Kerr spectra for different phases of Ni2MnGa alloy: austenite, nonmodulated martensite ...

• Magnetic and Magneto-Optical Properties of Fe75-xMn25Gax Heusler-like Compounds 

  Král, Daniel; Beran, Lukáš; Zelený, Martin; Zemen, Jan; Antoš, Roman; Hamrle, Jaroslav; Zázvorka, Jakub; Rameš, Michal; Onderková, Kristýna; Heczko, Oleg; Veis, Martin (MDPI, 2020-02-04)

  Fe75-xMn25Gax Heusler-like compounds were investigated in a wide range of Fe/Ga ratios while keeping the Mn content constant and equal 25 at% in order to elucidate the interplay between magnetic properties and composition. ...

• The Origins of High-Entropy Alloy Contamination Induced by Mechanical Alloying and Sintering 

  Moravčík, Igor; Kubíček, Antonín; Moravčíkova de Almeida Gouva, Larissa; Adam, Ondřej; Kaňa, Václav; Pouchlý, Václav; Záděra, Antonín; Dlouhý, Ivo (MDPI, 2020-09-03)

  One of the prevailing problems for materials produced by powder metallurgy is contamination from various sources. This work deals with the influence of process parameters and presence of process control agents (PCA) on the ...

• Influence of Hydroxyapatite Nanoparticles and Surface Plasma Treatment on Bioactivity of Polycaprolactone Nanofibers 

  Šťastná, Eva; Částková, Klára; Ráheĺ, Jozef (MDPI, 2020-08-20)

  Nanofibers are well known as a beneficial type of structure for tissue engineering. As a result of the high acquisition cost of the natural polymers and their environmentally problematic treatment (toxic dissolution agents), ...

• Wear of grinding rotors with thermally-sprayed coatings in a high-speed mill 

  Tkachenko, Serhii; Dvořák, Karel; Jech, David; Slámečka, Karel; Klakurková, Lenka; Paloušek, David; Čelko, Ladislav (Elsevier, 2018-10-15)

  In this paper, the erosion behavior of three types of protective thermally-sprayed coatings and non-coated substrate steel was investigated under semi-industrial test conditions using a laboratory high-speed pin mill DESI-11. ...

• Structure–Properties Relationship of Electrospun PVDF fibers 

  Částková, Klára; Kaštyl, Jaroslav; Sobola, Dinara; Petruš, Josef; Šťastná, Eva; Říha, David; Tofel, Pavel (MDPI, 2020-06-23)

  Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers’ ...

• TiO2 Nanotube Layers Decorated with Al2O3/MoS2/Al2O3 as Anode for Li-ion Microbatteries with Enhanced Cycling Stability 

  Tesfaye, Alexandr T.; Sopha, Hanna Ingrid; Ayobi, Angela; Zazpe Mendioroz, Raúl; Rodriguez-Pereira, Jhonatan; Michalička, Jan; Hromádko, Luděk; Ng, Siow Woon; Spotz, Zdeněk; Přikryl, Jan; Macák, Jan; Djenizian, Thierry (MDPI, 2020-05-01)

  TiO2 nanotube layers (TNTs) decorated with Al2O3/MoS2/Al2O3 are investigated as a negative electrode for 3D Li-ion microbatteries. Homogenous nanosheets decoration of MoS2, sandwiched between Al2O3 coatings within ...

• 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 ...

• Self-supported sulphurized TiO2nanotube layers as positive electrodes forlithium microbatteries 

  Salian, Girish D.; Krbal, Miloš; Sopha, Hanna Ingrid; Lebouin, Chrystelle; Coulet, Marie-Vanessa; Michalička, Jan; Hromádko, Luděk; Tesfaye, Alexandr T.; Macák, Jan; Djenizian, Thierry (Elsevier, 2019-09-01)

  We report the synthesis and characterization of self-supported sulphurized TiO2 nanotube layers as a cathode material for Li microbatteries. Sulphurized TiO2 nanotubes were obtained by annealing of selfsupported TiO2 ...

• Monotonic and cyclic properties of TiAl alloys Monotic and cyclic properties of TiAl alloys doped with Nb, Mo and C 

  Chlupová, Alice; Obrtlík, Karel; Beran, Přemysl; Heczko, Milan; Polák, Jaroslav; Kruml, Tomáš (Elsevier, 2014-06-25)

  Six grades of TiAl alloys doped with 7 at.% Nb and variable content of C and/or Mo were studied. The as-received microstructure and phase composition of the alloys was characterized using neutron diffraction experiments ...

• 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 ...

• Nitrogen Interstitial Alloying of CoCrFeMnNi High Entropy Alloy through Reactive Powder Milling 

  Moravčík, Igor; Čížek, Jan; Moravčíkova de Almeida Gouva, Larissa; Čupera, Jan; Gubán, Ivan; Dlouhý, Ivo (MDPI, 2019-04-04)

  The present work is focused on the synthesis of CoCrFeMnNi high entropy alloy (HEA) interstitially alloyed with nitrogen via powder metallurgy routes. Using a simple method, nitrogen was introduced to the HEA from the ...

• Selective Laser Melting Strategy for Fabrication of Thin Struts Usable in Lattice Structures 

  Vrána, Radek; Koutný, Daniel; Paloušek, David; Pantělejev, Libor; Jaroš, Jan; Zikmund, Tomáš; Kaiser, Jozef (MDPI, 2018-09-18)

  This paper deals with the selective laser melting (SLM) processing strategy for strut-lattice structure production which uses only contour lines and allows the porosity and roughness level to be managed based on ombination ...

• First-principles study of Zn-doping effects on phase stability and magnetic anisotropy of Ni-Mn-Ga alloys 

  Janovec, Jozef; Straka, Ladislav; Sozinov, Alexei; Heczko, Oleg; Zelený, Martin (IOP Publishing, 2020-02-04)

  The effect of Zn doping on Ni-Mn-Ga magnetic shape memory alloy was studied by the first-principles calculations using exact muffin-tin orbital method in combination with the coherent-potential approximation and projector ...

• Evaluation of Sintering Behavior of Premix Al-Zn-Mg-Cu Alloy Powder 

  Rudianto, Haris; Jang, Gwang Joo; Sun, Yang Sang; Kim, Yong Jin; Dlouhý, Ivo (Hindawi, 2015-05-09)

  Sintering of light aluminium alloys powder has been investigated as a way to substitute steels in automotive and aerospace industries. Premix Al-5.5Zn-2.5Mg-0.5Cu composite powder called Alumix 431D was analyzed in this ...

• A Practical Approach for the Calculation of the Activation Energy of the Sintering 

  Pouchlý, Václav; Hrubý, Jan; Maca, Karel (International Institute for the Science of Sintering, 2016-12-15)

  Newly developed software for calculation of activation energy (Qs in the following) of sintering using the Wang and Raj model is presented. To demonstrate the practical potential of the software and to evaluate the behaviour ...

• Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering 

  Talimian, Ali; Pouchlý, Václav; El-Maghraby, H.F.; Maca, Karel; Galusek, Dušan (ELSEVIER SCI LTD, 2020-06-01)

  The discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used ...

• Synthesis of high density sub-10 µm (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3-xCeO2 lead-free ceramics using a twostep sintering technique 

  Bijalwan, Vijay; Tofel, Pavel (TAYLOR & FRANCIS LTD, 2019-10-29)

  (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3-xCeO2, (BCZTCe) lead-free piezoelectric ceramics were processed conventionally using a two-step sintering technique. The results suggest that two-step sintering is an effective technique to ...

• Elastic and Plastic Behavior of the QE22 Magnesium Alloy Reinforced with Short Saffil Fibers and SiC Particles 

  Zapletal, Josef; Doležal, Pavel (MDPI AG, 2018-02-15)

  Magnesium alloy QE22 (nominal composition 2 wt % Ag, 2 wt % mixture of rare earth elements, balance Mg) was reinforced with 5 vol % Saffil fibers and 15 vol % SiC particles. The hybrid composite was prepared via the squeeze ...

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