A5020373789- Advanced materials and composites
- High-Temperature Coating Behaviors
- Advanced ceramic materials synthesis
- Welding Techniques and Residual Stresses
- Metal and Thin Film Mechanics
- Titanium Alloys Microstructure and Properties
- Engineering and Environmental Studies
- Nuclear Materials and Properties
- Diamond and Carbon-based Materials Research
- Metal Alloys Wear and Properties
- Engineering Diagnostics and Reliability
- Advanced Welding Techniques Analysis
- Catalytic Processes in Materials Science
- Additive Manufacturing Materials and Processes
- Surface Modification and Superhydrophobicity
- Industrial Engineering and Technologies
- Intermetallics and Advanced Alloy Properties
- Microstructure and Mechanical Properties of Steels
- MXene and MAX Phase Materials
- Nuclear materials and radiation effects
- Advanced machining processes and optimization
- Engineering Technology and Methodologies
- Advanced Surface Polishing Techniques
- Tribology and Wear Analysis
- Plasma Applications and Diagnostics
Central European Institute of Technology
2018-2022
Brno University of Technology
2017-2022
Novosibirsk State Technical University
2014-2018
A method of surface alloying titanium substrates with tantalum in order to obtain corrosion-resistant layers is described. An electron beam injected into the atmosphere used as a power source. powder layer containing composition components and fluxing agent was placed on Ti plate. The plate exposed scanning moved at speed 1cm/sec. range 5cm, frequency 50 Hz 33.5 kW. To enhance degree coating procedure repeated up 4 times. Alloyed 2-3 mm thick 40 wt % Ta were obtained. rate corrosion HNO 3...
Changes in fluids contact angle the interaction with materials surface can play a critical role enhancement of hydro-machine components and pipelines efficiency and/or service lifetime. However most nowadays used coatings are made from polymers or ceramic polymer composites produced by highly sophisticated very expensive techniques. Unfortunately there lack mechanical properties. With aim to study topography on water changes, representatives wear resistant (WC10Co4Cr, Cr 2 O 3 +5SiO +3TiO Al...
The study investigates the possibility of inert gas arc welding a double layer composite material on titanium base with an anti-corrosive obtained by fused deposition powder mix containing tantalum and niobium over using electron beam emitted into atmosphere. Butt fillet options were tested two types edge preparation. Welds subjected to metallographic examination including structural analysis chemical phase composition welds. A conclusion was made regarding for manufacturing items from...
One of the approaches to increase thermic efficiency aerospace engines is application abradable coatings enabling minimization and control clearance between stator rotating blades tips. The main purpose this contribution define role different technological parameters utilized for atmospheric plasma spraying AlSi-polyester coating on its resulting microstructure. Deposition real engine parts mostly dependent stand-off distance angle. These two influence not only microstructure but also...
The contribution focuses on the description of failure mechanism atmospheric plasma sprayed multilayer thermal barrier coatings subjected to calcia-magnesia-alumino-silicate (CMAS) environmental attack. To identify exothermic and endothermic reactions which occurred during heating/cooling by means calorimetry was also utilized initial yttria stabilized zirconia (YSZ) powder subsequently used for spraying coating system (TBCs), CMAS later thin layer deposition its mixture. Atmospheric spray...
Nowadays, the contribution of rare-earth oxide compounds is extensively investigated with aim to improve service life gas turbine engine components protected by thermal barrier coatings (TBCs) against environmental Calcia-Magnesia-Alumino-Silicate (CMAS) attack. Therefore, TBCs consisting a NiCrAlY bond coat, Yttria Stabilized Zirconia (YSZ) and/or mixture YSZ and Gadolinium Zirconate (YSZ+GZ) interlayers, GZ top which were all deposited atmospheric plasma spraying onto nickel-based...
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Only a few types of commercially available high temperature ceramic abradable coatings are presented on the market and most them consist partially stabilized yttria zirconia with polymer porosity former agent and/or hBN solid lubricant. The basic demand placed include balance between hardness erosion resistance. contribution focuses description microstructure, phase composition alternative atmospheric plasma sprayed deposited from four different experimental powder mixtures: (i) commercial...
This paper shows the results of solving a 3D problem to define types structures and tensions which can appear during butt contact welding process dissimilar steels through low carbon steel inserts. The finite element method calculate welded was used. thickness inserts main variable parameter. According numerical simulation using increase reliability joints between pearlitic high-carbon austenitic chromium-nickel steel. best result obtained by an insert with less than 20 mm. Structural...
Nowadays commonly used thermal barrier coatings (TBC) are based on yttria stabilized zirconia (YSZ). Addition of mullite phase into the YSZ coating can improve resulting high temperature properties. The contribution focuses cyclic oxidation behaviour two TBC systems with different top coats (TC) deposited by means atmospheric plasma spraying. initial mullite-YSZ powder mixture consisted 29 vol. % and 71 YSZ. conventional system ~ 150 µm thick NiCoCrAlYHfSi bond coat (BC) 300 coat....
The present study was focused on the high-energy ball milling preparation of oxide dispersed Mo-10 vol.%La 2 O 3 composite powder by using two systems, including an attritor mill with a horizontally operating rotor and planetary mill. Microstructural investigations scanning electron microscopy (SEM) X-ray diffraction (XRD) found out that powders refined laminated microstructure can be obtained both systems. Under selected conditions, Mo-La better particle size homogeneity more uniform...
The possibility of joining titanium substrates with Ti-Ta corrosion-resistant coatings was investigated. Joints were obtained by manual tungsten inert gas welding. Microstructure investigations revealed the inhomogeneous distribution alloying elements and a martensitic microstructure in joints. Microhardness values welded seams approximately equal varied from 380 to 420 HV. value substrate microhardness about 180 An ultimate strength joints 580 MPa while starting material 365MPa.
ПОЛУЧЕНИЕ СТРУКТУРЫ БЕЙНИТА РЕГУЛИРУЕМОЙТЕРМИЧЕСКОЙ ОБРАБОТКОЙ СТАЛИ 20ГФЛ
According to the value of water contact angle (WCA), surfaces can be roughly defined as hydrophilic (with WCA less than 90°) or hydrophobic higher 90°). Water wetting behavior plays important role and with special wettability (hydrophobic-superhydrophobic; hydrophilic-superhydrophilic) used both in daily life (solar cells, smartphones, car windows, etc.) industry (corrosion resistance, self-cleaning, anti-icing properties, etc.). Nowadays, development surface treatment that may applied is...
The high-speed grinding wheel can be defined as a self-sharpening composite structural tool composed from abrasive grains held in specific binder. main properties of wheels depend on the type elements, grit size, grade, binder and resulting structure, which is influenced by several crucial technological processing steps. Preparation an initial mixture particles together with permanent binder’s temporary followed pressing high-temperature sintering essential step manufacturing high-quality...
Abstract Mo-La 2 O 3 composites are potential high-temperature materials for future technology devices operating at temperatures above 1300 °C because of their excellent thermal stability, high mechanical properties and good creep resistance. In this study, we focused on the preparation Mo-matrix/lanthanum oxide (La ) composite powders using high-energy attrition milling. The effects rotational milling speed (350 800 rpm) La content (2.5 10 vol. %) microstructural evolution, phase...