The present paper is focused on the characterization of differences between two microstructures that can be obtained using SPS technology, namely (i) columnar and (ii) two-zone microstructure including lamellas fine unmelted particulates. optimization spray parameters was made, advanced microstructural studies coatings were performed. work zirconia stabilized by yttria (YSZ, ZrO2 + 14 wt.% Y2O3) both ceria (YCSZ, 24 CeO2 2.5 which are frequently used as thermal barrier coatings. Two types...

This study investigates the strain‐controlled low‐cycle fatigue (LCF) behaviour of an untreated and surface‐treated MAR‐M247 superalloy in a symmetrical push‐pull cycle with constant strain rate at 900°C laboratory air. A newly developed experimental thermal environmental barrier coating (TEBC) system, consisting 170 μ m thick CoNiCrAlY bond coat (BC) bilayer ceramic top (TC), interlayer upper layer, was deposited using air plasma spray techniques. The average thickness 77 formed from...

One of the directions intensively investigated in field milling is high-energy (HEM). type HEM high-speed grinding disintegrators. This mill particularly suitable for and activation fine powder materials. It has several advantages, such as a very intensive continual refining process. disadvantage that its pins are prone to abrasion, which may result decrease efficiency grinding. effect was this paper. Laboratory high speed disintegrator DESI 11 with steel used. Portland clinker chosen...

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...

Barium-Magnesium-Aluminium-Silicate (BMAS) powder was produced from a mixture of initial compounds BaO–MgO–Al 2 O 3 –SiO by means solid state synthesis at the temperature 1200 °C for hours in laboratory furnace. Synthetized crushed into fraction 15-45 μm planetary ball mill. Thermal barrier coating system consisting CoNiCrAlY (bond coat) and BMAS (top sprayed atmospheric plasma spray technique onto polycrystalline nickel-based superalloy substrate. During spraying process, underwent phase...

This contribution deals with thermal cycling of barrier coatings (TBCs) NiCrAlY and NiCoCrAlY bond-coats, yttria stabilized zirconia (YSZ) top-coat that were prepared by atmospheric plasma spraying from commercial powders. The samples pre-oxidized, based on isothermal oxidation the two in order to diminish influence residual stresses after experiments. Surface topographies both bond-coats measured using optical profilometry several surface parameters evaluated characterize them....

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...

Microstructural changes in conventional yttria stabilized zirconia (YSZ) and multilayer Mullite-YSZ/YSZ (M-YSZ) thermal barrier coatings were compared based on high temperature isothermal oxidation at the temperatures of 1050, 1150 1250 °C. Both types produced from commercially available powders utilizing atmospheric plasma spray technique. Initial M-YSZ powder mixture consisted 29 vol. % Mullite 71 YSZ. Inconel Alloy 713LC nickel-based superalloy was used as a substrate material (cylinders,...

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...

Electrochemical process of conversion coatings formation on Zn-Ti alloy surface during one-step anodizing was studied in NaOH and KOH electrolytes over the range voltages (4-50 V) constant time order to investigate parameters for origin anodic zinc coating. Stainless steel used as a counter electrode electrolyte agitated by compressed air. Coatings microstructures morphology were characterized means scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDX). Surface...

The 8 wt. % yttria stabilized zirconia top coat (TC) and the CoNiCrAlY bond (BC) were sprayed onto surface of newly developed fine-grained cast polycrystalline nickel-based superalloy Inconel 713LC by means atmospheric plasma spraying (APS). As-prepared samples isothermally exposed at temperature 1050 °C for 200 hours in an ambient atmosphere. Structural changes thermal barrier coatings (TBC) system after exposure studied scanning electron microscope equipped with energy dispersive...

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...

The main goal of this contribution is to investigate the influence substrate morphology on resulting thermally sprayed coatings microstructure. Therefore, three different representative coating systems and/or thermal spray techniques were utilized produce grid-like structure substrates: (i) CoNiCrAlY bond coat (BC) by high velocity oxygen fuel (HVOF) technique and yttria stabilized zirconia (YSZ) top (TC) means atmospheric plasma (APS) technique, (ii) YSZ APS (iii) nanoparticle colloid...

Abstract The main purposes of applying the coatings on surface different components include improvement their functional and decorative properties. properties coating are strongly dependent its microstructure. goal paper is to show differences two microstructures that can be obtained using suspension plasma spraying technology: (i) columnar one; and, (ii) lamellar, two-zone Initially, optimization spray parameters was made then microstructural studies were performed. work focused zirconia...