Number of found documents: 582
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Test procedure - neosted SOT test bench
Pleštil, Jan; Steiger, Lukáš; Václavík, Jan; Veselý, Martin
2018 - English
This document describes the final design of the NEOSTED SOT Test Bench, i.e. its individual components, and serves as a groundwork for the acceptance test procedure.\nThe test to be performed according to this procedure are to demonstrate the compliance of the above item to the requirements specified in the applicable document [1] as part of the overall verification program. The test results shall be collected in a Test Report. Keywords: collimator; optical tests; stage; alignment Available at various institutes of the ASCR
Test procedure - neosted SOT test bench

This document describes the final design of the NEOSTED SOT Test Bench, i.e. its individual components, and serves as a groundwork for the acceptance test procedure.\nThe test to be performed ...

Pleštil, Jan; Steiger, Lukáš; Václavík, Jan; Veselý, Martin
Ústav fyziky plazmatu, 2018

Výzkumná zpráva Projekt MidFree
Beneš, Jiří; Matoušek, Ondřej; Špína, Michal; Tomka, David
2018 - Czech
Výzkumná zpráva popisující model procesního řetězce, metodiky měření a charakterizace středních frekvencí (MSF), vibrací a hodnocení nástrojů. Research report describing the process chain model, MSF measurement methodology, vibration and tool evaluation. Keywords: mid spatial frequencies measurement; vibration measurement Available at various institutes of the ASCR
Výzkumná zpráva Projekt MidFree

Výzkumná zpráva popisující model procesního řetězce, metodiky měření a charakterizace středních frekvencí (MSF), vibrací a hodnocení nástrojů....

Beneš, Jiří; Matoušek, Ondřej; Špína, Michal; Tomka, David
Ústav fyziky plazmatu, 2018

Vývoj optického řešení Prototypu II
Pintr, Pavel
2018 - Czech
Zpráva popisuje vývoj aktivní laserové hlavice. Zpráva je rozdělena do dvou etap. První etapa popisuje vývoj navařovací laserové hlavice s obdélníkovým spotem. Druhá část popisuje vývoj svařovací hlavice s proměnným zvětšením. This report describes the development of an active laser head. This report is separated into two sections. First section describes a development of laser head with the rectangular spot. The second section describes a development of welding laser head with the adaptive zoom. Keywords: laser head; active optics; LIMO Available at various institutes of the ASCR
Vývoj optického řešení Prototypu II

Zpráva popisuje vývoj aktivní laserové hlavice. Zpráva je rozdělena do dvou etap. První etapa popisuje vývoj navařovací laserové hlavice s obdélníkovým spotem. Druhá část popisuje vývoj svařovací ...

Pintr, Pavel
Ústav fyziky plazmatu, 2018

Combined coatings against mechanical wear and corrosion low carbon steel
Brožek, Vlastimil; Pokorný, P.; Kolísko, J.; Vokáč, M.; Mastný, L.; Stoulil, J.
2018 - English
In this study, special ceramic coatings were prepared on low carbon steel (1.0060 - EN 10027-2) via the plasma spraying technique using a WSP®-H plasma generator with output of up to 40 kg/h of aluminum oxide. Corundum coatings were deposited directly on the surface of steel plungers equipped with an anti-corrosion interlayer of zinc phosphate. Coating adhesion properties were tested using pin-off tests (modified ISO 4624) and reached a maximum value of 26 MPa. Corrosion resistance was evaluated by measurements of impedance spectra in the 100 kHz - 10 mHz range in a water solution of sodium sulfate. The capacity of electric double-layer varied depending on the porosity and thickness of the coating. Low-porosity coatings of >1.5 mm thickness had RCT 1.29·105 Ω·m2. The abrasive resistance of coatings was measured by rotary/machining test with SiC cutting knives, using a downforce of 50 kg·cm-2. Abrasion losses decreased with the quality of finish - starting at 0.00266 g cm-2 min-1 down to virtually zero losses after polishing the surface below Ra = 0.55 micro m. Keywords: Abrasion; Ceramic coatings; Corrosion resistance; Plasma spraying; Steel phosphating Available at various institutes of the ASCR
Combined coatings against mechanical wear and corrosion low carbon steel

In this study, special ceramic coatings were prepared on low carbon steel (1.0060 - EN 10027-2) via the plasma spraying technique using a WSP®-H plasma generator with output of up to 40 kg/h of ...

Brožek, Vlastimil; Pokorný, P.; Kolísko, J.; Vokáč, M.; Mastný, L.; Stoulil, J.
Ústav fyziky plazmatu, 2018

Suspension plasma spraying of sub-stoichiometric titania by hybrid water/argon stabilized plasma torch
Mušálek, Radek; Ctibor, Pavel; Medřický, Jan; Tesař, Tomáš; Kotlan, Jiří; Lukáč, František
2018 - English
In this study, suspension plasma spraying of sub-stoichiometric titania was attempted using hybrid water/argon stabilized plasma torch (WSP-H). Porous coatings with fine cauliflower-like columnar microstructure were successfully deposited in two separate experiments with different power levels of the plasma torch. In both cases, high solid-load content (40 wt. %) of the water-based suspension resulted in considerable coating thickness increase per deposition cycle. Coating annealing and partial remelting of the surface asperities were also achieved by additional pass of plasma torch in front of the coating surface. According to X-ray diffraction, all coatings consisted dominantly of rutile phase. Detailed microscopic observation of the as-sprayed and annealed deposits showed that the local coloration of the coating (ranging from dark blue to beige) was driven by the local overheating of the rough coating surface which could also promote the oxygen intake. Moreover, sample annealing was also observed to increase the sample reflectivity as observed by UV-VIS-NIR scanning spectrophotometry Keywords: Liquid feedstock; Plasma spraying; Suspension; Thermal spraying; Titania; WSP-H Available at various institutes of the ASCR
Suspension plasma spraying of sub-stoichiometric titania by hybrid water/argon stabilized plasma torch

In this study, suspension plasma spraying of sub-stoichiometric titania was attempted using hybrid water/argon stabilized plasma torch (WSP-H). Porous coatings with fine cauliflower-like columnar ...

Mušálek, Radek; Ctibor, Pavel; Medřický, Jan; Tesař, Tomáš; Kotlan, Jiří; Lukáč, František
Ústav fyziky plazmatu, 2018

Výroba optických komponent pro prototyp I
Doleček, Roman; Pintr, Pavel
2018 - Czech
Zpráva popisuje proces výroby freeform zrcadel, které jsou částí optické soustavy prototypu laserové hlavy. This report describes the process of a freeform mirrors production. Mirrors are part of optical system of the laser head prototype. Keywords: SPDT; freeform; laser head Available at various institutes of the ASCR
Výroba optických komponent pro prototyp I

Zpráva popisuje proces výroby freeform zrcadel, které jsou částí optické soustavy prototypu laserové hlavy....

Doleček, Roman; Pintr, Pavel
Ústav fyziky plazmatu, 2018

Opracování materiálu S-FPL53
Melich, Radek; Rail, Zdeněk; Šípová, Gabriela
2018 - Czech
Cílem práce je zvládnutí opracování materiálu S-FPL53 vzhledem ke kvalitě tvaru optického povrch a minimalizaci mikrodrsnosti povrchu. The aim of the work is mastering of S-FPL53 material machining with respect to the optical surface shape accuracy and to minimize the surface microroughness. Keywords: S-FPL 53 machining Available at various institutes of the ASCR
Opracování materiálu S-FPL53

Cílem práce je zvládnutí opracování materiálu S-FPL53 vzhledem ke kvalitě tvaru optického povrch a minimalizaci mikrodrsnosti povrchu....

Melich, Radek; Rail, Zdeněk; Šípová, Gabriela
Ústav fyziky plazmatu, 2018

Thin nitride layers as permeation barriers
Veverka, Jakub; Matějíček, Jiří; Lukáč, František; Pospíšil, D.; Cvrček, L.; Nemanič, V.
2018 - English
Permeation barriers represent one of the crucial fields in materials development for thermonuclear fusion. Primary objective of the barriers is to suppress the permeation of hydrogen isotopes (mainly tritium) from future thermonuclear fusion facilities. Secondary objective is to reduce their retention in structural materials. Expected reactor conditions put high demands on the material, as well as on the final barrier quality. Key properties are tritium permeation reduction, absence of defects (especially cracks), high-temperature stability and corrossion resistance, and compatibility with structural materials (mostly ferritic-martensitic steels). Thin nitride layers, identified as promising permeation barriers, were prepared by diffusion-based nitridation and physical vapour deposition (PVD), and characterized. Keywords: Permeation barriers; Nitride layers; PVD coating; Permeation measurement Available at various institutes of the ASCR
Thin nitride layers as permeation barriers

Permeation barriers represent one of the crucial fields in materials development for thermonuclear fusion. Primary objective of the barriers is to suppress the permeation of hydrogen isotopes (mainly ...

Veverka, Jakub; Matějíček, Jiří; Lukáč, František; Pospíšil, D.; Cvrček, L.; Nemanič, V.
Ústav fyziky plazmatu, 2018

Characterization of flame sprayed abradable seal NiCrAl-bentonite coatings
Houdková, Š.; Schubert, Jan; Česánek, Z.; Lukáč, František; Bystrianský, M.
2018 - English
The NiCrAl-21% Bentonite abradable coating, deposited by flame spraying, was exposed to 720°C / 1 hour air-annealing to evaluate its resistance against heat-induced changes. The SEM and XRD microstructure evaluation was done. After the air-annealing, the increase of HR15Y surface hardness was recorded and accompanied with decrease of abradability evaluated by Progressive Readability Hardness (PAH) test, although no demonstrable microstructural changes was recorded by SEM. XRD analyses evidenced the formation of nickel oxides and ordered Ni3Al phase during the air-annealing. Besides the abradable coating evaluation, this work brings the verification of the potential of PAH for scratch hardness testing. The measurement provides the results with low scatter, compared to usual surface hardness testing, and enables to distinguish between the depth of indentation in loaded and unloaded state, pointing out to the elastic/plastic deformation ratio. Keywords: Abradability; Abradable seal; Flame spray; NiCrAl-Bentonite Available at various institutes of the ASCR
Characterization of flame sprayed abradable seal NiCrAl-bentonite coatings

The NiCrAl-21% Bentonite abradable coating, deposited by flame spraying, was exposed to 720°C / 1 hour air-annealing to evaluate its resistance against heat-induced changes. The SEM and XRD ...

Houdková, Š.; Schubert, Jan; Česánek, Z.; Lukáč, František; Bystrianský, M.
Ústav fyziky plazmatu, 2018

Study on polishing of ZnSe with diamond suspension
Procháska, František; Thoř, Tomáš
2018 - English
Observe the effect of diamond slurries as polishing element on ZnSe, i.e. observe the change of surface of ZnSe as consequence to the series of polishing with the use of mentioned diamond slurries. Keywords: ZnSe polishing; Diamond polishing slurry Available at various institutes of the ASCR
Study on polishing of ZnSe with diamond suspension

Observe the effect of diamond slurries as polishing element on ZnSe, i.e. observe the change of surface of ZnSe as consequence to the series of polishing with the use of mentioned diamond slurries.

Procháska, František; Thoř, Tomáš
Ústav fyziky plazmatu, 2018

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