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Collection's Items (Sorted by Submit Date in Descending order): 1 to 18 of 18
Moskovchenko, Alexey , Vavilov, V. P. , Bernegger, Raphael , Maierhofer, Christiane , Chulkov, Arsenii O.
Detecting Delaminations in Semitransparent Glass Fiber Composite by Using Pulsed Infrared Thermography

Thanks to its good strength/mass ratio, a glass fibre reinforced plastic (GFRP) composite is a common material widely used in aviation, power production, automotive and other industries. In its turn, active infrared (IR) nondestructive testing (NDT) is a common inspection technique for&...

Pérez, Rosalina , Querejeta, Amaia L. , Corres, María Ángeles , Muñoz, Josemari Maria , Grande, Hans Jürgen , Honnerová, Petra
Thermal behaviour of vitreous ceramic coatings obtained by electrophoretic deposition

In this study, three different vitreous ceramic coatings have been designed to improve radiation heat transfer and thereby increase the thermal efficiency of fired heaters or furnaces working at high temperatures. The vitreous ceramic coatings were produced through Electrophoretic Deposition tech...

Schmailzl, Anton , Käsbauer, Johannes , Martan, Jiří , Honnerová, Petra , Schäfer, Felix , Fichtl, Maximilan , Lehrer, Tobias , Tesař, Jiří , Honner, Milan , Hierl, Stefan
Measurement of core temperature through semi-transparent polyamide 6 using scanner-integrated pyrometer in laser welding

Predicting the core temperature during welding is an ambitious aim in many research works. In this work, a 3D-scanner with integrated pyrometer is characterized and used to measure the temperature during quasi-simultaneous laser transmission welding of polyamide 6. However, due to welding&#x...

Martan, Jiří , Moskal, Denys , Smeták, Ladislav , Honner, Milan
Performance and Accuracy of the Shifted Laser Surface Texturing Method

Shifted laser surface texturing method (sLST) was developed for increasing of production speed of functional surface textures to enable their industrial applicability. In this work, the shifted method is compared with classic methods on real texturing example with focus on achieving highest&...

Muzika, Lukáš , Švantner, Michal , Moskal, Denys
Experimental investigation of time-power transformation method for flash-pulse thermographic testing

The paper deals with flash-pulse thermography, which is one of the most used thermographic inspection methods. The method is based on flash excitation of an inspected object and an analysis of its thermal response recorded by an infrared camera. This paper deals with a time-po...

Švantner, Michal , Muzika, Lukáš , Houdková Šimůnková, Šárka
Quantitative inspection of coating thickness by flash-pulse thermography and time-power transformation evaluation

sample. Its application to coatings can indicate a presence of local thickness variations; however, it mostly does not bring any quantitative information about the thickness of the coatings. This contribution is focused on a quantification of the thermographic inspection, which would make&#x...

Švantner, Michal , Študent, Josef , Veselý, Zdeněk
Continuous walking-beam furnace 3D zonal model and direct thermal-box barrier based temperature measurement

Numerical simulation of industrial reheating furnaces belongs to important procedures for an optimization of their designand processing parameters. A 3D numerical model of a continuous gas burners heated walking-beam furnace is introduced in this paper. The main benefit of the model is ...

Matějíček, Jiří , Vilémová, Monika , Moskal, Denys , Mušálek, Radek , Krofta, Jan , Janata, Marek , Kutílek, Zdeněk , Klečka, Jakub , Heuer, Simon , Martan, Jiří , Nardozza, Emanuele , Houdková Šimůnková, Šárka , Dorow-Gerspach, Daniel
The Role of Laser Texturing in Improving the Adhesion of PlasmaSprayed Tungsten Coatings

Švantner, Michal , Muzika, Lukáš , Houdková Šimůnková, Šárka
Quantitative inspection of coatings thickness by time-power transformation flash pulse thermographic method

Thermographic testing is an inspection method, which primary indicates a presence of discontinuities in a tested sample. Its application to coatings can indicate a presence of local thickness variations; however, it mostly does not bring a quantitative information about a thickness of t...

Moskal, Denys , Martan, Jiří , Kučera, Martin
Shifted Laser Surface Texturing (sLST) in Burst Regime

High laser-scanning speed and high precision are two opposite parameters for effective laser surface texturing (LST). Application of a sequence of laser pulses (called burst) helps to increase the processing effectivennes and speed, but precision control of laser pulses arriving becomes a&#x...

Lyphout, Christophe , Bolelli, Giovanni , Karhanová, Eva , Sato, Kazuto , Yamada, Junya , Houdková Šimůnková, Šárka , Lusvarghi, Luca , Manfredini, Tiziano
Influence of hardmetal feedstock powder on the sliding wear and impact resistance of High Velocity Air-Fuel (HVAF) sprayed coatings

The present work aimed to clarify how the characteristics of WC-CoCr hardmetal feedstock powders, namely thegrain size of the WC carbides and of the binder and the compressive strength of the sintered aggregates, affect the dry sliding wear and impact resistance of coatings deposit...

Martan, Jiří , Moskal, Denys , Kučera, Martin
Laser surface texturing with shifted method—Functional surfaces at high speed

Laser surface texturing is a promising technology for future wide application of functional surfaces with specific properties like hydrophobic, antibacterial, adhesive, selfcleaning, anticorrosion, light absorbing, low friction, etc. Great advancements have been made in this field in last years, but&#...

Cizek, Jan , Brožek, Vlastimil , Chráska, Tomáš , Lukáč, František , Medricky, Jan , Mušálek, Radek , Tesar, Tomas , Šiška, Filip , Antos, Z. , Čupera, Jan , Matějková, Michaela , Spotz, Zdeněk , Houdková Šimůnková, Šárka , Kverka, Miloslav
Silver-Doped Hydroxyapatite Coatings Deposited by Suspension Plasma Spraying

Pure hydroxyapatite suspension was produced by wet chemical synthesis. Using a hybrid water-stabilized torch, a series of HA coatings were produced on SS304 and Ti6Al4V substrates and their properties were characterized by SEM, EDX and XRD techniques. After deposition, the amorphous phase&#x...

Mertl, Jiří , Žáčková, Eva , Řepová, Barbora
Quality of life of patients after total laryngectomy: the struggle against stigmatization and social exclusion using speech synthesis

In this article, we deal with the problem of potential stigmatization and social exclusion of people that have voice/speech problems due to neck cancer, especially those who have lost their voice because of total laryngectomy, and we analyze how this potential stigmatization could&...

Vostřák, Marek , Houdková Šimůnková, Šárka , Bystrianský, Martin , Česánek, Zdeněk
Vliv procesních parametrů laserového povlakování na strukturu a odolnost proti abrazivnímu opotřebení povlaku WcNiCrBSi

In laser cladding, the final structure of coatings and thus their functional properties are dependent on process parameters used and the initial powder composition. This study focuses on laser cladding of WC-NiCrBSi coatings. As the powder used is a blend of 60% tungsten carbide...

Kučera, Martin , Martan, Jiří , Franc, Aleš
Časově rozlišené měření teploty při laserovém značení korozivzdorné oceli

A new measurement system was developed for time-resolved surface temperature measurement in nanosecond time scale. A study of surface temperatures reached by different parameters of laser marking and their correlation with resulting microstructure, phase composition and corrosion tests performed on...

Martan, Jiří , Tesař, Jiří , Kučera, Martin , Honnerová, Petra , Benešová, Martina , Honner, Milan
Analysis of short wavelength infrared radiation during laser welding of plastics

In this article, a new measurement system and a new approach in calculation for infrared (IR) radiation investigation in quasi-simultaneous transmission laser welding of plastics are presented. The measurement system is based on a MW/SWIR (medium-wave/short-wave infrared) camera and optical&...

Muzika, Lukáš , Švantner, Michal , Kučera, Martin
Lock-in and pulsed thermography for solar cells testing

Inspection of solar cells is an important part of their production process, because even their small defects can cause a significant drop of a whole photo-voltaic module performance. LED illuminated lock-in (LEDILIT) and flash-pulse (FPT) thermographic techniques were compared in this study....

Collection's Items (Sorted by Submit Date in Descending order): 1 to 18 of 18