scholarly journals Modification of the Properties of Al2O3/TZ-3YS Thermal Barrier Coating by the Addition of Silicon Carbide Particles and Fructose

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 387
Author(s):  
Amparo Borrell ◽  
Pablo Carpio ◽  
Maria Dolores Salvador ◽  
David Busquets Mataix ◽  
Víctor Carnicer ◽  
...  
Keyword(s):  
Thermal Characterization ◽  
Thermal Barrier ◽  
Mechanical And Thermal Properties ◽  
High Melting Point ◽  
Barrier Coating ◽  
Lower Porosity ◽  
Silicon Carbide Particles ◽  
Sic Reinforcement ◽  
Carbide Particles ◽  
Sic Particle

Al2O3/TZ-3YS coatings developed by suspension plasma spraying were studied in the present work. Mechanical and thermal characterization was realized to evaluate the suitability of thermal barrier coatings. In addition, SiC particle reinforcement was evaluated for its effect on the mechanical properties of the coating. The problem with SiC reinforcement is its high melting point that causes a large amount of unmolten material to be deposited on the coating. One possible solution followed in the present study consists of including fructose as an additive in order to modify the suspension characteristics. The results conclude that the use of fructose as an additive increases the mechanical and thermal properties (from 1.0 to 1.6 W/m·K), since the microstructure is modified, and results in a lower porosity (17%) compared to the SiC coating (25%).

scholarly journals Research on Thermal Stability and Properties of Ca3ZrSi2O9 as Potential T/EBC Materials

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 583
Author(s):  
Yangyang Pan ◽  
Bo Liang ◽  
Yaran Niu ◽  
Dijuan Han ◽  
Dongdong Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Stability ◽  
Fracture Toughness ◽  
Room Temperature ◽  
Coefficient Of Thermal Expansion ◽  
Atmospheric Plasma ◽  
Thermal Barrier ◽  
Mechanical And Thermal Properties ◽  
Self Healing ◽  
Barrier Coating

In this study, a new coating material for thermal barrier coating (TBC) or environment barrier coating (EBC) application, Ca3ZrSi2O9 (CZSO), was synthesized and prepared by atmospheric plasma spray (APS) technology. The evolution of the phases and microstructures of the coatings with different thermal-aged were characterized by XRD, XRF, EDS and SEM, respectively. The thermal stability was measured by TG-DTA and DSC. The mechanical and thermal properties, including Vickers hardness (HV), fracture toughness (KIC), thermal conductivity () and coefficient of thermal expansion (CTE) were focused on. It was found that the as-sprayed CZSO coating contained amorphous phase. Crystalline transformation happened at 900–960 ∘C and no mass changes took place from room temperature (RT) to 1300 ∘C. The phenomena of microcrack self-healing and composition uniformity were observed during thermal aging. The of coating was very low at about 0.57–0.80 Wm−1K−1 in 200–1200 ∘C. The combined properties indicated that the CZSO coating might be a potential T/EBC material.

Mechanical and thermal properties of phthalonitrile resin reinforced with silicon carbide particles

2015 ◽  
Vol 71 ◽  
pp. 48-55 ◽  
Author(s):  
Mehdi Derradji ◽  
Noureddine Ramdani ◽  
Tong Zhang ◽  
Jun Wang ◽  
Tian-tian Feng ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Thermal Properties ◽  
Mechanical And Thermal Properties ◽  
Silicon Carbide Particles ◽  
Carbide Particles

scholarly journals Review on Nickel Aluminide based Bond Coat Properties and Oxidation Performance for Thermal Barrier Coating (TBC) Application

2018 ◽  
Vol 7 (4.35) ◽  
pp. 624
Author(s):  
NF. Kadir ◽  
A. Manap ◽  
M. Satgunam ◽  
Nurfanizan Mohd Afandi
Keyword(s):  
Thermal Barrier Coating ◽  
Test Performance ◽  
Bond Coat ◽  
Nickel Aluminide ◽  
Protective Coatings ◽  
Thermal Barrier ◽  
Mechanical And Thermal Properties ◽  
Barrier Coating ◽  
Oxidation Performance ◽  
Structural Failures

Thermal Barrier Coating (TBC) as protective coatings are applied to maintain efficiency and prevent structural failures mainly in gas turbine system. This paper reviews on recent bond coating from Nickel aluminide bond coat with addition of Reactive Elements (RE). This paper also reviews the major concern in TBC with presence of different Reactive Element (RE) added in term of RE composition, properties and oxidation test performance. Recent studies are more focusing on few REs including Ce, Hf, La, Y and Zr based on oxidation property test results. The comparisons clearly show that ceramics addition are superior for bond coat mechanical and thermal properties improvement while RE addition such as Ce and Zr present excellent oxidation performance at 900°C and above.

Intrinsic and Extrinsic Variable Effects on Thermal Barrier Coatings Life

2002 ◽  
Author(s):  
Zaher Mutasim
Keyword(s):  
Thermal Barrier Coatings ◽  
Laboratory Testing ◽  
Ceramic Coating ◽  
The Other ◽  
Interface Temperature ◽  
Thermal Barrier ◽  
Mechanical And Thermal Properties ◽  
Barrier Coatings ◽  
Gaseous Environment ◽  
Barrier Coating

Thermal barrier coating life is dependent on many intrinsic and extrinsic variables within the environment that they operate within. Intrinsic variables include material composition, mechanical and thermal properties, microstructure and ceramic coating thickness. On the other hand, extrinsic variables include cycle time, interface and top surface temperatures, and the gaseous environment, among others. Laboratory testing was conducted to determine the effects of these variables on TBC life. This paper addresses TBC life as a function of microstructure, thickness, and interface temperature.

Compressive and thermal characterization of syntactic foams containing hollow silicon carbide particles with porous shell

2014 ◽  
Vol 131 (17) ◽  
pp. n/a-n/a ◽  
Author(s):  
Matthew Labella ◽  
Vasanth Chakravarthy Shunmugasamy ◽  
Oliver M. Strbik ◽  
Nikhil Gupta
Keyword(s):  
Silicon Carbide ◽  
Thermal Characterization ◽  
Syntactic Foams ◽  
Porous Shell ◽  
Silicon Carbide Particles ◽  
Carbide Particles

HOT CORROSION OF CERIA-YTTRIA STABILIZED ZIRCONIA PLASMA SPRAYED THERMAL BARRIER COATING BY EUTECTIC VANDIUM PENTAOXIDE-SODIUM SULFATE

2018 ◽  
Vol 18 (1) ◽  
pp. 182-192 ◽  
Author(s):  
Mohammed J Kadhim ◽  
Mohammed H Hafiz ◽  
Maryam A Ali Bash
Keyword(s):  
Thermal Barrier Coating ◽  
Hot Corrosion ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
High Volume ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Plan View ◽  
Barrier Coating ◽  
Plasma Sprayed

The high temperature corrosion behavior of thermal barrier coating (TBC) systemconsisting of IN-738 LC superalloy substrate, air plasma sprayed Ni24.5Cr6Al0.4Y (wt%)bond coat and air plasma sprayed ZrO2-20 wt% ceria-3.6 wt% yttria (CYSZ) ceramic coatwere characterized. The upper surfaces of CYSZ covered with 30 mg/cm2 , mixed 45 wt%Na2SO4-55 wt% V2O5 salt were exposed at different temperatures from 800 to 1000 oC andinteraction times from 1 up to 8 h. The upper surface plan view of the coatings wereidentified for topography, roughness, chemical composition, phases and reaction productsusing scanning electron microscopy, energy dispersive spectroscopy, talysurf, and X-raydiffraction. XRD analyses of the plasma sprayed coatings after hot corrosion confirmed thephase transformation of nontransformable tetragonal (t') into monoclinic phase, presence ofYVO4 and CeVO4 products. Analysis of the hot corrosion CYSZ coating confirmed theformation of high volume fraction of YVO4, with low volume fractions of CeOV4 and CeO2.The formation of these compounds were combined with formation of monoclinic phase (m)from transformation of nontransformable tetragonal phase (t').

Evaluation of Spatial Resolution of Nondestructive Testing of Thermal Barrier Coating by Terahertz Imaging

2012 ◽  
Vol 132 (10) ◽  
pp. 864-870
Author(s):  
Tetsuo Fukuchi ◽  
Norikazu Fuse ◽  
Mitsutoshi Okada ◽  
Tomoharu Fujii ◽  
Maya Mizuno ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Thermal Barrier Coating ◽  
Spatial Resolution ◽  
Terahertz Imaging ◽  
Thermal Barrier ◽  
Barrier Coating
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