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Collection's Items (Sorted by Submit Date in Descending order): 1 to 11 of 11
Houška, Jiří
Maximum N content in a-CNx by ab-initio simulations

Structures of amorphous CNx materials are predicted by extensive ab-initio molecular-dynamics simulations (more than 800 trajectories) in a wide range of compositions and densities. The main attention is paid to the formation of N2 molecules, with the aim to predict and explain the ...

Musil, Jindřich , Jaroš, Martin , Kos, Šimon
Superhard metallic coatings

The letter reports on the surface hardening of bulk soft metal materials by protective coatings made of the same metal as bulk but with up to 6 times higher hardness than that of the bulk material. This surface hardening is demonstrated by covering of the Ti substrat...

Rezek, Jiří , Novák, Petr , Houška, Jiří , Pajdarová, Andrea Dagmar , Kozák, Tomáš
High-rate reactive high-power impulse magnetron sputtering of transparent conductive Al-doped ZnO thin films prepared at ambient temperature

Reactive high-power impulse magnetron sputtering was used for high-rate (deposition rate of 60 nm/min) deposition of conductive (resistivity of 0.003 Ω·cm) and optically transparent (extinction coefficient at the wavelength of 550 nm of 0.01) ZnO:Al thin films at ambient temperature (<&#x...

Musil, Jindřich , Kos, Šimon , Jaroš, Martin , Čerstvý, Radomír , Haviar, Stanislav , Zenkin, Sergei , Čiperová, Zuzana
Coating of overstoichiometric transition metal nitrides (TMNx (x > 1)) by magnetron sputtering

This article reports on the formation of strongly overstoichiometric ZrNx>1 and Ti(Al, V)Nx>1 coatings by reactive magnetron sputtering. Problems in the formation of overstoichiometric coatings and possible ways to form strongly overstoichiometric TMNx>1 nitride coatings up to TMNx=2 dinitride...

Javdošňák, Daniel , Musil, Jindřich , Soukup, Zbyněk , Haviar, Stanislav , Čerstvý, Radomír , Houška, Jiří
Tribological properties and oxidation resistance of tungsten and tungsten nitride films at temperatures up to 500 °C

The paper reports on the structure, microstructure, mechanical and tribological properties and oxidation resistance of WNx films with a stoichiometry x = [N]/[W] ranging from 0 to 1.5 prepared by magnetron sputtering. It was found that (i) films with x ≤ 0.20 exhibit α-W ...

Houška, Jiří , Kolenatý, David , Vlček, Jaroslav , Bárta, Tomáš , Rezek, Jiří , Čerstvý, Radomír
Significant improvement of the performance of ZrO2/V1–xWxO2/ZrO2 thermochromic coatings by utilizing a second-order interference

The paper deals with VO2-based thermochromic coatings prepared by reactive magnetron sputtering. We combine four ways how to improve the coating performance and to increase its application potential. First, reactive high-power impulse magnetron sputtering with a pulsed O2 flow control allowed...

Vejchodský, Tomáš , Jaroš, Filip , Kučera, Milan , Rybář, Vojtěch
Unilateral regulation breaks regularity of Turing patterns

We consider a reaction-diffusion system undergoing Turing instability and augment it by an additional unilateral nonsmooth unilateral source term. We investigate its influence on the Turing instability and on the character of resulting patterns. We illustrate the importance of the nonsmoothness&#...

Loewenhoff, Thorsten , Linke, Jochen Max , Matějíček, Jiří , Rasiński, Marcin , Vostřák, Marek , Wirtz, Marius
Laser re-melting of tungsten damaged by transient heat loads

In the current study, a solid state disc laser with a wavelength of 1030 nm and maximum power of 5.3 kW was used to melt the surface of pure tungsten samples (manufactured according to ITER specifications by Plansee SE). Several combinations of laser power and traverse&#x...

Tvarožek, Vladimír , Szabó, O. , Novotný, I. , Kováčová, S. , Škriniarová, J. , Šutta, Pavol
Plazmonické vlastnosti naprášených Au nano-ostrůvkových polí

The specificity of the formation of Au sputtered nanoisland arrays (NIA) on a glass substrate or on a ZnO thin film doped by Ga is demonstrated. Statistical analysis of morphology images (SEM, AFM) exhibited the Log-normal distribution of the size (area) of nanoislands—their modus&...

Musil, Jindřich , Šícha, Jan
Decomposition of organic dyes with sputtered TiO2 photocatalytic films

Musil, Jindřich , Heřman, David , Šícha, Jan , Strýhal, Zdeněk , Pavlík, Jaroslav
High-rate low-temperature dc pulsed magnetron sputtering of photocatalytic TiO2 films: the effect of repetition frequency

Collection's Items (Sorted by Submit Date in Descending order): 1 to 11 of 11