Burner Rig for Small Particle Erosion Testing of Thermal Barrier Coatings

2014 ◽  
Vol 42 (3) ◽  
pp. 20120303 ◽  
Author(s):  
Robert A. Miller ◽  
Maria A. Kuczmarski
Keyword(s):  
Thermal Barrier Coatings ◽  
Small Particle ◽  
Thermal Barrier ◽  
Particle Erosion ◽  
Barrier Coatings ◽  
Erosion Testing

Erosion Behavior of PS-PVD Thermal Barrier Coatings and the Effect of Composite Coating (PS-PVD + APS) Thickness

2020 ◽  
Vol 993 ◽  
pp. 1095-1103
Author(s):  
Wen Long Chen ◽  
Hong Jian Wu ◽  
Min Liu ◽  
Xiao Ling Xiao
Keyword(s):  
Thermal Barrier Coatings ◽  
Erosion Resistance ◽  
Failure Behavior ◽  
Thermal Barrier ◽  
Dense Layer ◽  
Particle Erosion ◽  
Barrier Coatings ◽  
Erosion Behavior ◽  
Layered Coating ◽  
Resistance Performance

In this work, feather-column 7YSZ thermal barrier coatings (TBCs) were prepared by plasma spray-physical vapor deposition (PS-PVD). The anti-particle erosion test was carried out at room temperature to study the erosion behavior and failure mechanism of PS-PVD TBCs. The results showed that the particle erosion process of the PS-PVD TBCs experienced three stages of high-rate, medium-rate and slow-rate erosion. In order to improve the particle erosion resistance of the PS-PVD TBCs, different thicknesses of dense-layered coatings were prepared on the surface of the PS-PVD TBCs by air plasma spraying (APS). The effect of dense-layered thickness on the erosion behaviour of PS-PVD TBCs was discussed. Experimental results showed that, as the thickness of the dense-layered increased, the erosion resistance of the PS-PVD TBCs enhanced. When the thickness of the dense-layered coating was 5μm, it was not obvious upon the influence on the erosion failure behavior of the PS-PVD TBCs. In the case of a 10μm dense-layered coating, the erosion resistance performance of the PS-PVD TBCs improved by about 30%. While the erosion resistance performance of the PS-PVD TBCs increased almost 4 times when the thickness of the dense layer reached 20μm.

Solid particle erosion of standard and advanced thermal barrier coatings

Wear ◽  
2016 ◽  
Vol 348-349 ◽  
pp. 43-51 ◽  
Author(s):  
F. Cernuschi ◽  
C. Guardamagna ◽  
S. Capelli ◽  
L. Lorenzoni ◽  
D.E. Mack ◽  
...  
Keyword(s):  
Solid Particle ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Barrier Coatings

Solid particle erosion of thermal spray and physical vapour deposition thermal barrier coatings

Wear ◽  
2011 ◽  
Vol 271 (11-12) ◽  
pp. 2909-2918 ◽  
Author(s):  
F. Cernuschi ◽  
L. Lorenzoni ◽  
S. Capelli ◽  
C. Guardamagna ◽  
M. Karger ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Solid Particle ◽  
Thermal Barrier Coatings ◽  
Vapour Deposition ◽  
Thermal Barrier ◽  
Solid Particle Erosion ◽  
Physical Vapour Deposition ◽  
Particle Erosion ◽  
Barrier Coatings

scholarly journals A solution to the challenges of particle erosion and thermal cycle for PS-PVD 7YSZ thermal barrier coatings

2021 ◽  
Author(s):  
Xiaofeng Zhang ◽  
Ming Li ◽  
Yan Zhang ◽  
Ziqian Deng ◽  
Jiafeng Fan ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coatings ◽  
Vapor Deposition ◽  
Thermal Cycle ◽  
Physical Vapor Deposition ◽  
Thermal Barrier ◽  
Particle Erosion ◽  
Barrier Coatings ◽  
Aero Engine ◽  
High Temperature Components

Abstract Advanced aero-engine is a key technique that is used all over the world, where many high-temperature components such as turbine blades and combustor, are made of Ni/Co/Fe based superalloys. However, they need high-temperature protection to avoid fast performance degradation. Generally, the superalloy high-temperature components are protected by thermal barrier coatings (TBCs) obtained via an atmospheric plasma spray (APS) and an electron beam-physical vapor deposition (EB-PVD). Here, a novel 3rd generation TBCs process using plasma spray-physical vapor deposition (PS-PVD) is presented, showing a more promising use than the traditional APS and EB-PVD. The PS-PVD feature uses evaporating ceramic powder, which results in the deposition of a feather-like columnar coating. This special microstructure showed good strain tolerance and non-line-of-sight (NLOS) deposition, giving great potential for application. In a working aero-engine, the high-temperature components face a serious environment, where foreign particle erosion is a great challenge and is the first barrier to the application of PS-PVD TBCs. As a solution, an Al-modification approach was proposed in this investigation. The results demonstrate that this approach can improve particle erosion resistance. Also, the thermal cycle performance had an apparent optimization.

Preparation and Solid Particle Erosion Behaviors of Plasma-Sprayed and Laser-Remelted ZrO2-7wt.%Y2O3 Thermal Barrier Coatings

2012 ◽  
Vol 159 ◽  
pp. 191-197 ◽  
Author(s):  
Dong Sheng Wang ◽  
Zong Jun Tian ◽  
Bin Yang ◽  
Li Da Shen
Keyword(s):  
Solid Particle ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Solid Particle Erosion ◽  
Laser Remelting ◽  
Particle Erosion ◽  
Barrier Coatings ◽  
Erosion Damage ◽  
Sprayed Coating ◽  
Plasma Sprayed

In this study, ZrO2-7wt.%Y2O3 thermal barrier coatings (TBCs) were prepared on TiAl base intermetallic alloy substrates by plasma spraying process. After that, the plasma-sprayed TBCs were laser remelted using a CO2 laser. Influences of laser remelting on the microstructure and solid particle erosion characterization of the coatings were researched. Meanwhile, the erosion damage modes of the two types of TBCs were discussed. The results show that the as-sprayed TBC has a typical lamellar stacking characteristic. The lamellar defect of the plasma-sprayed coating is erased, and the compactness of the coating is improved significantly after laser remelting. The laser-remelted coating consists of column-like crystals along the direction of the heat current. The laser-remelted coating had better erosion resistance than the as-sprayed coating. Owing to the limited bonding at the interfaces between lamellar, the spalling of the sprayed splats from the lamellar interface is mainly attributed to the erosion failure of the as-sprayed coating. In addition, crushing of brittle ceramic coating is also responsible for the erosion damage of the plasma-sprayed TBC. In contrast, cracking occurs within region near the surface of the laser-remelted layer and that erosion occurs mainly by removal of these small blocks. Moreover, the laser-remelted has evident mciro-cutting marks and shows some ductile erosion characteristic.

Characterization of thermal barrier coatings formed by electon-beam physical vapor deposition (EB-PVD)

1989 ◽  
Vol 47 ◽  
pp. 426-427
Author(s):  
Ozer Unal
Keyword(s):  
Thermal Barrier Coatings ◽  
Physical Vapor Deposition ◽  
Ceramic Coating ◽  
High Vacuum ◽  
Ceramic Coatings ◽  
High Energy ◽  
Thermal Barrier ◽  
Protective Oxide ◽  
Barrier Coatings ◽  
Energy Beam

Interest in ceramics as thermal barrier coatings for hot components of turbine engines has increased rapidly over the last decade. The primary reason for this is the significant reduction in heat load and increased chemical inertness against corrosive species with the ceramic coating materials. Among other candidates, partially-stabilized zirconia is the focus of attention mainly because ot its low thermal conductivity and high thermal expansion coefficient.The coatings were made by Garrett Turbine Engine Company. Ni-base super-alloy was used as the substrate and later a bond-coating with high Al activity was formed over it. The ceramic coatings, with a thickness of about 50 μm, were formed by EB-PVD in a high-vacuum chamber by heating the target material (ZrO2-20 w/0 Y2O3) above its evaporation temperaturef >3500 °C) with a high-energy beam and condensing the resulting vapor onto a rotating heated substrate. A heat treatment in an oxidizing environment was performed later on to form a protective oxide layer to improve the adhesion between the ceramic coating and substrate. Bulk samples were studied by utilizing a Scintag diffractometer and a JEOL JXA-840 SEM; examinations of cross-sectional thin-films of the interface region were performed in a Philips CM 30 TEM operating at 300 kV and for chemical analysis a KEVEX X-ray spectrometer (EDS) was used.

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