performance evaluation of plasma sprayed yttria coatings

Effect of controlled segmentation on the thermal cycling behavior of plasma sprayed YSZ thick coatings

Atmospheric plasma sprayed (APS) Yttria-stabilized zirconia (YSZ)-coatings are deposited on Ni-based superalloy IN738. Thermal cycling performance was tested before and after the development of controlled segmentation crack densities in the coatings at 1150 C for 500 cycles.

Characterization of Wear Properties of Plasma Sprayed Ceramic Coatings

of plasma sprayed coatings after wear test under water-lubricated conditions and images of wear tracks, it may be presume, that dominant wear mechanism is abrasive wear. a b Fig. 3. Typical optical view and surface plot of plasma sprayed coating Z100 with

[PDF] The Evolution of Thermal Barrier Coatings in Gas

Thermal barrier coatings (TBCs) have been used for almost three decades to extend the life of combustors and augmentors and, more recently, stationary turbine components. Plasma-sprayed yttria-stabilized zirconia TBC currently is bill-of-material on many commercial jet engine parts. A more durable electron beam-physical vapor deposited (EB-PVD) ceramic coating recently has been developed for

Thermal conductivity and sintering characteristics of

Yttria-stabilized zirconia has long been the favoured refractory material for demanding applications such as thermal barrier coatings on turbine components. Its low thermal conductivity, relatively high thermal expansion coefficient, and good fracture toughness are most useful parameters when acute thermal cycles are considered. In recent years however, the demand for higher turbine operating

EFFECTS OF YTTRIUM, ALUMINUM, AND CHROMIUM CONCENTRATIONS IN BOND COATINGS ON THE PERFORMANCE OF ZIRCONIA

of the plasma sprayed bond coating (350 rms). It is believed that the surface roughnesses of the Ni-19,8Al t Ni-20.2Cr, and Ni-16.2Cr~5.5Al bond coatings were very similar since all three bond coatings were applied under similar conditions.

Preparation and in vitro evaluation of plasma

The bonding strength between the coatings and Ti-6Al-4V substrates is around 38.7-42.2 MPa, which is higher than that of plasma sprayed hydroxyapatite (HA) coatings reported previously. The prepared akermanite coatings reveal a distinct apatite-mineralization ability in simulated body fluid.

Characterization of Plasma

Characterization of Plasma-Sprayed Yttria-Stabilized Zirconia Coatings by Cathodoluminescence Characterization of Plasma-Sprayed Yttria-Stabilized Zirconia Coatings by Cathodoluminescence Mauer, Georg; Sebold, Doris; Vaen, Robert; Stver, Detlev 2009-08-20 00:00:00 JTTEE5 18:572–577 DOI: 10.1007/s11666-009-9370-x 1059-9630/$19.00 ASM International Characterization of Plasma-Sprayed Yttria

Parametric Appraisal of Process Parameters for

This paper presents the application of the Taguchi experimental design in developing nanostructured yittria stabilized zirconia (YSZ) coatings by plasma spraying process. This paper depicts dependence of adhesion strength of as-sprayed nanostructured YSZ coatings on various process parameters, and effect of those process parameters on performance output has been studied using Taguchi#x2019;s

Parametric Appraisal of Process Parameters for

This paper presents the application of the Taguchi experimental design in developing nanostructured yittria stabilized zirconia (YSZ) coatings by plasma spraying process. This paper depicts dependence of adhesion strength of as-sprayed nanostructured YSZ coatings on various process parameters, and effect of those process parameters on performance output has been studied using Taguchi#x2019;s

Unique performance of thermal barrier coatings made of yttria

Unique performance of thermal barrier coatings made of yttria-stabilized zirconia at extreme temperatures (1500 C) Robert Vaen1,2 explanation of these astonishing findings is given by the evaluation of energy release rate peaks during fast transient cooling

Characterization of air plasma

2016/11/8Air plasma-sprayed (APS) yttria-stabilized zirconia (YSZ) conventional and nanostructured coatings were deposited with nitrogen as the primary plasma gas. Nanostructured coatings were deposited as a function of critical plasma spray parameter (CPSP). Microstructural characteristics, e.g., phase distribution, porosity, microhardness, percentage of partially melted (PM) regions, surface

Parametric appraisal of process parameters for adhesion of

2013/10/28This paper presents the application of the Taguchi experimental design in developing nanostructured yittria stabilized zirconia (YSZ) coatings by plasma spraying process. This paper depicts dependence of adhesion strength of as-sprayed nanostructured YSZ coatings on various process parameters, and effect of those process parameters on performance output has been studied using

Structural evolution of plasma

The microstructure of plasma-sprayed nanostructured yttria-stabilized zirconia (YSZ) coatings may change during high-temperature exposure, which would influence the coating performance and service lifetime. In this study, the phase structure and the microstructural evolution of 3YSZ (zirconia-3 mol% yttria) and 5YSZ (zirconia-5 mol% yttria) nanostructured coatings were investigated by means of

Performance of Thermal Barrier Coatings in High Heat Flux

cessing of coatings for improved tolerance to such loads. In this study, a commercial plasma torch has been used as a high heat flux source. Various plasma sprayed zirconia-yttria thermal barrier coating systems were exposed in this rig and the response of

Characterization and durability testing of plasma

Characterization and durability testing of plasma-sprayed zirconia-yttria and hafnia-yttria thermal barrier coatings. Part II, Effect of spray parameters on the performance of several hafnia-yttria and zirconia-yttria coatings Author: Robert A Miller; George W Leissler; United States. United States.

Laser Surface Annealing of Plasma Sprayed Coatings

Laser surface annealing provides a rapid and efficient means for surface alloying and modification of ceramic materials. In this study, Alumina-13% Titania coatings were sprayed with a water-stabilized plasma spray gun. The coated surface was treated by Excimer

Unique performance of thermal barrier coatings made of

Unique performance of thermal barrier coatings made of yttria‐stabilized zirconia at extreme temperatures which has a concentration of 330 ppm in the YSZ powder and can give a yellowish color of the as‐sprayed coatings. 23 The photos indicate that this

Evaluation of Wear Resistance of Plasma Sprayed

Various ceramic coatings based on yttria stabilized zirconia (YSZ), deposited by atmospheric plasma spraying technique on stainless steel substrates were studied for investigation of their tribological behaviour. Materials selected for this investigation were tetragonal

Performance of vacuum plasma spray and HVOF bond

2021/4/28article{osti_1423091, title = {Performance of vacuum plasma spray and HVOF bond coatings at 900 and 1100 C}, author = {Lance, Michael J. and Haynes, James A. and Pint, Bruce A.}, abstractNote = {The effects of Ti and B additions to a vacuum plasma sprayed (VPS) NiCoCrAlYHfSi bond coating on thermal barrier coating (TBC) performance were studied at 1100 C and 900 C and

CHARACTERISTIC EVALUATION OF MECHANICAL PROPERTIES OF PLASMA SPRAYED

materials, process and evaluation related issues. The life and functional efficiency of ceramic coatings made by plasma spraying method are influenced by the coating properties among which the wear resistance, fatigue strength, bond strength, hardness etc., of

[PDF] The Evolution of Thermal Barrier Coatings in Gas

Thermal barrier coatings (TBCs) have been used for almost three decades to extend the life of combustors and augmentors and, more recently, stationary turbine components. Plasma-sprayed yttria-stabilized zirconia TBC currently is bill-of-material on many commercial jet engine parts. A more durable electron beam-physical vapor deposited (EB-PVD) ceramic coating recently has been developed for

Publications

The influence of process equipment on the properties of suspension plasma sprayed yttria-stabilized zirconia coatings (2012) Proceedings of the International Thermal Spray Conference, pp. 793-799. Cuglietta, M., Kesler, O. Fabrication of direct oxidation solid oxide fuel cell anodes using a novel atmospheric plasma spraying technique (2011) ECS Transactions, 35 (2 PART 2), pp. 1781-1790.

Understanding the Formation of Vertical Cracks in Solution

Yttria‐stabilized zirconia (YSZ) deposition by the solution precursor plasma spraying (SPPS) route has been of interest for potential thermal barrier coating (TBC) applications. It has been surmised that realization of unique microstructural features like vertical cracks, nanosized pores and fine splats in the TBCs can significantly enhance coating durability and performance.

Investigation of Plasma Coatings Manufactured from Synthesized

structural data of plasma sprayed zirconia coatings pre-pared from yttria stabilized zirconia powders synthesized by precipitation method. The relationship between the started powder characteristics and the structural data of plasma sprayed coatings has been

Erosion Performance of Atmospheric Plasma Sprayed

Erosion Performance of Atmospheric Plasma Sprayed Thermal Barrier Coatings with Diverse Porosity Levels Share Abstract: Thermal barrier coatings (TBCs) prolong the durability of gas turbine engine components and enable them to operate at high temperature.

Coatings

The spallation of the ceramic topcoat, typically made of yttria-stabilized zirconia (YSZ), is one of the factors that hinders the service of TBCs. The failure of atmospheric plasma-sprayed (APS) TBCs can be affected by many factors, such as TGO growth [1,2,4,5,6,7,8], thermal expansion mismatch [1,8,9,10], YSZ sintering [11,12,13,14,15], the temperature gradient across YSZ coating [16,17,18,19

Microstructure and mechanical properties of plasma

In this paper, HA/yttria stabilized zirconia (YSZ)/Ti-6Al-4V composite coatings that possess superior mechanical properties to conventional plasma sprayed HA coatings were developed. Ti-6Al-4V powders coated with fine YSZ and HA particles were prepared through a

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