Hot corrosion studies of nanostructured gadolinium zirconate thermal barrier coatings

Ganesan, B; Hariharan, P.; Durgalakshmi, D.

doi:10.1016/j.ceramint.2021.06.002

Cited by 7 publications

(3 citation statements)

References 48 publications

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“…The Gd 2.3 Zr 1.7 O 6.85 coating exhibited up to a 35% reduction in penetration depth after a 24-h annealing process, indicating improved long-term corrosion resistance compared to Gd 2.0 Zr 2.0 O 7.0 and Gd1.8Zr2.2O 7.1 coatings. This study suggests that developing practical fabrication techniques for non-stoichiometric GZO coatings with adaptable CMAS corrosion resistance could lead to the development of more durable TBCs in the future [19,20].…”

Section: Gadolinium Zirconate (Gzo)mentioning

confidence: 91%

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Recent Development in Advance Ceramic Materials and Understanding the Mechanisms of Thermal Barrier Coatings Degradation

Iqbal

Moskal

2023

Arch Computat Methods Eng

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Metallic alloys' behavior at high temperatures, especially their response to corrosion and formation of protective surface layers, has long been a focus of scientific inquiry. Although certain alloy compositions require an initiation period before hot corrosion advances to the propagation stage, no combination of alloys can be considered impervious to hot corrosion indefinitely. The capacity of nickel-based materials to tolerate extreme circumstances such high temperatures, acidity, corrosion, and scratching is highly valued. However, they are unable to satisfy the strict demands of today's high-temperature applications. The durability of thermal barrier coatings (TBCs), which are prone to oxidation, rust, and degradation from sulphates and foreign object damage, has been the subject of recent study. For sophisticated ceramic materials exposed to high temperatures, hot rust degradation poses a considerable challenge. The main objective of this study is to investigate the effects of severe degradation on several advanced ceramic material types and their level of advancement. The purpose of the inquiry is to comprehend the deteriorating processes at the long term working condition, including the function of oxidation and liquid salts. Additionally, we investigate the effects of temperature, environment, and contact duration on the heated weathering behavior of earthenware. Finally, we discuss strategies for mitigating hot corrosion degradation in ceramics, such as protective coatings like new design of TBCs, doping, and composition optimization. This paper aims to offer a thorough understanding of the hot corrosion behavior of ceramics, which is crucial for developing durable materials suitable for high-temperature applications. Additionally, it explores the fabrication of protective coatings and addresses the challenges faced in this regard. The insights gained from this research can contribute to the advancement of resilient ceramic fabrics and the development of effective protective coatings.

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Section: Gadolinium Zirconate (Gzo)mentioning

confidence: 91%

“…Fig 19. The residual stresses (S22) at room temperature in different FE models after 799 h oxidation: a TBC in the absence of internal oxides, b TBC with ten[121] …”

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confidence: 99%

Recent Development in Advance Ceramic Materials and Understanding the Mechanisms of Thermal Barrier Coatings Degradation

Iqbal

Moskal

2023

Arch Computat Methods Eng

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“…The LZ powders utilized in this investigation were synthesized by the solid-state method [9,18,19]. The raw materials for the synthesis of LZ, lanthanum oxide (La 2 O 3 , 99.9%, molecular weight-325.81 g mol −1 ), and zirconium oxide (ZrO 2 , 99.5%, molecular weight −123.22 g mol −1 ) powders were employed.…”

Section: Synthesis Of Lanthanum Zirconate Powdersmentioning

confidence: 99%

Optimization of plasma spray process variables to attain the minimum porosity and maximum hardness of the LZ/YSZ thermal barrier coatings utilizing the response surface approach

Mathanbabu¹,

Thirumalaikumarasamy²,

Tamilselvi³

et al. 2022

Mater. Res. Express

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Lanthanum zirconate (LZ) has emerged as a novel thermal barrier coating (TBC) material because of its higher temperature phase stability, and low sintering ability than the current standard yttria-stabilized zirconia (YSZ). In order to combine the advantages, LZ and YSZ feedstock powders are blended with predetermined weight ratios (50:50) as composite coatings. The leading issue in developing the composite coating using the atmospheric plasma spray method (APS) is finding the optimum range of input parameters to attain the desired coating properties. This issue can be resolved by developing empirical relations to find the porosity and micro hardness of the coating by the atmospheric plasma spray method (APS). Spray parameters such as input power, spray distance, and powder feed rate play a vital part in determining the coating quality. Three variables and five levels of central composite rotatable design (CCD) to reduce the overall run of the experiment were utilized in the research. The empirical relations were predicted to find the porosity and micro hardness of the specimens with APS process parameters, and the empirical relations were examined through ANOVA. Optimizing the plasma spray parameters was done using response surface methodology (RSM), which provides the minimum porosity and maximum hardness. It is validated using the surface response graphs, contour plots, and overlay plots. As a result, the input power has the greatest impact on the coating properties among the three variables, and the standoff distance and powder feed rate are the subsequent important spray parameters.

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Comparative study on the synthesis and characterization of Gd2Zr2O7 nanoparticles by mechanical milling and Co-precipitation techniques

Bhavesh,

Hariharan,

Dhinasekaran

2024

Ceramics International

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Hot corrosion studies of nanostructured gadolinium zirconate thermal barrier coatings

Cited by 7 publications

References 48 publications

Recent Development in Advance Ceramic Materials and Understanding the Mechanisms of Thermal Barrier Coatings Degradation

Recent Development in Advance Ceramic Materials and Understanding the Mechanisms of Thermal Barrier Coatings Degradation

Optimization of plasma spray process variables to attain the minimum porosity and maximum hardness of the LZ/YSZ thermal barrier coatings utilizing the response surface approach

Comparative study on the synthesis and characterization of Gd2Zr2O7 nanoparticles by mechanical milling and Co-precipitation techniques

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