CMAS Corrosion Resistance Behavior and Mechanism of Hf6Ta2O17 Ceramic as Potential Material for Thermal Barrier Coatings

Liu, Sai; Liu, Qing; Hu, X.P.; Guo, Jin Yun; Zhu, Wang; Zhang, Fan; Xia, Jie

doi:10.3390/coatings13020404

Cited by 6 publications

(5 citation statements)

References 39 publications

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“…Materials are being forced past their initial design limits due to the need for engines to operate at higher temps in order to improve engine yields and continuous exposure to hostile environments and high pressures. Due to their thermal instability, most metals in atmospheric vapors usually combine to form oxides, sulfides, carbides, or a mix of these based on their makeup and working conditions.surface reactions may be minor or unnoticeable at low temperatures and humidity, but as temperatures rise, reaction rates rise as well, implying that an alloy's corrosion resistance becomes critical [8].…”

Section: High Temperature Induced Corrosionmentioning

confidence: 99%

“…According to a recent research by Liu et al [8], in both short-term and long-term testing, Hf 6 Ta 2 O 17 ceramic outperforms certain classic and innovative CMAS-resistant ceramic materials in TBCs. Temperature, which is controlled by CMAS viscosity, is the most important factor influencing the CMAS behavior of Hf…”

Section: Hafnium Oxide (Hfo 2 )mentioning

confidence: 99%

“…La 2 Zr 2 O 7 has a more advantageous thermal conductivity at high temps than YSZ, which is about 20% less. The La 2 Zr 2 O 7 layer didn't break during the initial [8] thermal cycle tests at temps above 1200 °C, and it showed thermal resilience. So La 2 Zr 2 O 7 is a very hopeful substance for modern TBCs.…”

Section: Lanthanum Zirconate (Lzo)mentioning

confidence: 99%

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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: High Temperature Induced Corrosionmentioning

confidence: 99%

Section: Hafnium Oxide (Hfo 2 )mentioning

confidence: 99%

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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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“…In addition to the performance required above, T/EBC also needs excellent resistance to high-temperature corrosion. During aero-engine operation, siliceous debris (such as sand, dust, and volcanic ash, mainly consisting of CaO, MgO, Al 2 O 3 , SiO 2 , CMAS) is ingested by the intake air and deposited on the surface of components, which corrodes T/EBCs, significantly decreasing their high-temperature capability [14][15][16][17]. For practical applications, T/EBCs inevitably face CMAS issues.…”

Section: Introductionmentioning

confidence: 99%

CeO2 Protective Material against CMAS Attack for Thermal–Environmental Barrier Coating Applications

Guo

Wang

Liu³

et al. 2023

Coatings

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Calcium–magnesium–alumina–silicate (CMAS) attack is a crucial issue for thermal–environmental barrier coatings (T/EBCs) with the ever-increasing operating temperature of turbine engines. In this study, CeO2 has been demonstrated as a promising protective material for T/EBCs against CMAS attack. At 1300 °C, CeO2 powder kept excellent phase and structural stability in molten CMAS; there were some CMAS constituents dissolved into the CeO2 lattice to form a solid solution. With higher CeO2 contents and longer duration time, more CeO2 solid solution particles were formed, which acted as the nucleating agent for CMAS crystallization. As a result, apatite, anorthite and wollastonite crystalline products were easily generated. At 1300 °C for 10 h, CeO2 pellets covered with CMAS powder had limited degradation, which was attributed to the rapid crystallization of molten CMAS due to the excellent nucleating agent effect of the precipitated CeO2 solid solution.

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“…To find and develop coatings with improved resistance to CMAS corrosion, research institutes have focused substantial research in the following directions: first, developing novel ceramic coating materials, such as RE 2 Zr 2 O 7 [13][14][15], REPO 3 [16], Ti 2 AlC [17], and Hf 6 Ta 2 O 17 [18]; second, doping YSZ with oxides, including rare earth oxide-doped YSZ [19,20] and Al-and Ti-doped YSZ [21][22][23]; third, depositing protective layers on the surface of the coatings, such as the Pt layer [24] and Al 2 O 3 layer [25]; fourth, designing dual-layer ceramic coating structures, such as Gd 2 Zr 2 O 7 /YSZ [26,27] and La 2 Ce 2 O 7 /YSZ [28]; fifth, optimization treatments on the surface of the ceramic coatings, such as reducing the surface roughness of coatings [29], laser modification [30], and creating micro-nano double-scale structure [31].…”

Section: Introductionmentioning

confidence: 99%

CMAS Corrosion Behavior of Nanostructured YSZ and Gd-Yb-Y-Stabilized Zirconia Coatings

Zou,

Gao,

et al. 2023

Coatings

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With the development of industry, the operating temperature of aero engines and gas turbines continues to increase; developing thermal barrier coatings (TBCs) with superior resistance to CaO-MgO-Al2O3-SiO2 (CMAS) corrosion has become a prominent research focus. In this study, atmospheric plasma spraying (APS) was used to prepare yttria-stabilized zirconia (YSZ), nanostructured yttria-stabilized zirconia (n-YSZ), and Gd-Yb-Y-stabilized zirconia (GYYSZ) coatings. The effects of CMAS exposure on the microstructure, chemical composition, phase transition, and microhardness of the coatings were investigated. Comparative analysis revealed that both phase transition and exfoliation occurred in corroded YSZ and n-YSZ coatings, with n-YSZ exhibiting more pronounced changes. In contrast, GYYSZ coatings remained stable without phase transition and exhibited a smaller increase in microhardness (270 HV0.3). Consequently, doping Gd/Yb/Y elements into ZrO2 can improve the performance of TBCs.

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CMAS Corrosion Resistance Behavior and Mechanism of Hf6Ta2O17 Ceramic as Potential Material for Thermal Barrier Coatings

Cited by 6 publications

References 39 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

CeO2 Protective Material against CMAS Attack for Thermal–Environmental Barrier Coating Applications

CMAS Corrosion Behavior of Nanostructured YSZ and Gd-Yb-Y-Stabilized Zirconia Coatings

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