Hot-corrosion resistance and phase stability of Yb2O3–Gd2O3–Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts

Song, Dowon; Song, Taeseup; Paik, Ungyu; Lyu, Guanlin; Kim, Junseong; Yang, Seung Cheol; Jung, Yeon Gil

doi:10.1016/j.surfcoat.2020.126197

Cited by 36 publications

(10 citation statements)

References 48 publications

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“…The source material Yb 2 O 3 powder they used has relatively high melting point of about 2346 °C. [122][123][124] For the conventional CVD methods, it is hard for the evaporation of Yb 2 O 3 powder. In their synthesis system, NaCl powder was used, which can increase the vapor pressure of Yb 2 O 3 power and decrease the energy barrier, leading to the formation of 2D YbOCl at 730-800 °C.…”

Section: Cvdmentioning

confidence: 99%

Recent Advances in 2D Rare Earth Materials

Chen

Han

Zhao

et al. 2020

Adv Funct Materials

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2D rare earth (RE) materials have received considerable attention in recent years due to the fascinating luminescence, magnetism, and electric properties originated from RE associated with sharp and various emission peaks, intrinsic 2D ferromagnetism, and incommensurate charge density wave. These materials might open up a new prospect in next‐generation lighting, magnetic devices, and phototransistors. Herein, a comprehensive review of 2D RE materials is presented, focusing on their recent progresses. First, the crystal structures of 2D RE materials are discussed. Then, typical synthesis methods such as mechanical exfoliation, molecular beam epitaxy, pulsed laser deposition, and chemical vapor deposition are introduced. Furthermore, various properties in luminescence, magnetism, and electronics are summarized. The recently reported RE‐based 2D novel photodetectors are outlined as three constructions: MoS2/RE, graphene/RE, and perovskite/RE, which show promising applications for both narrow and broad band detection arised from the special absorption windows of different RE elements. Finally, the conclusions and outlook of this area are proposed, such as exploring novel 2D RE compounds, improving stability, and broadening applications.

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Section: Cvdmentioning

confidence: 99%

Recent Advances in 2D Rare Earth Materials

Chen

Han

Zhao

et al. 2020

Adv Funct Materials

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“…An explanation for the high Y 2 O 3 reactivity in SO 3 /Na 2 SO 4 is derived from Lewis acid‐base theory 40 . Y 2 O 3 has an electron configuration that creates large polar sites acting as Lewis base sites, exhibiting high reactivity by donating electron pairs to the Lewis acid SO 3 from Na 2 SO 4 decomposition.…”

Section: Discussionmentioning

confidence: 99%

“…An explanation for the high Y 2 O 3 reactivity in SO 3 /Na 2 SO 4 is derived from Lewis acid-base theory. 40 Y 2 O 3 has an electron configuration that creates large polar sites acting as Lewis base sites, exhibiting high reactivity by donating electron pairs to the Lewis acid SO 3 from Na 2 SO 4 decomposition. Additionally, SiO 2 is reported to be an acidic oxide due to its electron-deficient configuration, 41,42 which is consistent with high silica-activity phases being less reactive to SO 3 .…”

Section: Discussionmentioning

confidence: 99%

Interactions of Na₂SO₄ and yttrium‐silicate environmental barrier coatings at 825°C

Ardrey,

Heinrich,

Opila

2023

J Am Ceram Soc.

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Yttrium‐silicates (Y2Si2O7 and Y2SiO5) are candidate environmental barrier coating (EBC) systems for silicon carbide ceramic matrix composites (SiC‐CMCs). These materials' high‐temperature, high‐velocity steam, and siliceous debris resistance are well studied. However, Na2SO4‐induced hot corrosion mechanisms are less understood. Free‐standing atmospheric plasma sprayed Y2Si2O7 and Y2SiO5 coupons were exposed to 2.5 mg/cm2 of Na2SO4 at 825°C in 0.1% SO2‐O2 (g). Scanning electron microscopy (SEM), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and inductively coupled plasma‐optical emission spectrometry (ICP‐OES) were used to identify a previously unknown damage mechanism. Water‐soluble Y and Na‐Y sulfates and oxysulfates formed in reaction with Na2SO4, causing significant damage to the yttrium‐silicate EBCs materials.This article is protected by copyright. All rights reserved

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“…Various research has been conducted to overcome the challenges of TBC to prolong the service life, and one of the common methods is by using dopant. Co-doping Yb 2 O 3 -Gd 2 O 3 -Y 2 O 3 co-doped with ZrO 2 (YGYZ), the outcome showed the tetragonal phase able to be retained 40% compared to the undoped YSZ [15].…”

Section: Limitation and Solutionsmentioning

confidence: 99%

“…The conceptual illustration of the method on gas turbine is illustrated in Figure 10. [15]. This earlier work revealed that applying dopant to YSZ and using different sintering method are one of those effective strategies to overcome the limitation which been mentioned in TBC application.…”

Section: High-velocity Air Fuel (Hvaf) Techniquementioning

confidence: 99%

Perspective Chapter: The Application of Yttria-Stabilized Zirconia (YSZ)

Cheong¹,

Sivanesan²

2023

Zirconia - New Advances, Structure, Fabrication and Applications

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Pure zirconia will transform into different phases, which include monoclinic, tetragonal, and cubic, at different high temperature levels. Specific phases can be retained at room temperature by adding stabilizer and yttria is one of the most common stabilizers for zirconia, commonly formed yttria stabilizer zirconia (YSZ). To utilize YSZ in various industry applications, the amount of yttria and sintering temperature played a vital role. Thus far, YSZ has received a warm welcome in the industries of thermal barrier coating (TBC), solid oxide fuel cell (SOFC), and biomaterial. However, the limitations and challenges still occur, and this opens up the room and possibility of enhancing and improving the material properties of YSZ for a better performance in the mentioned area. This chapter explained the working principles of YSZ in the industries respectively and the research been conducted to improve the materials accordingly.

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Hot-corrosion resistance and phase stability of Yb2O3–Gd2O3–Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts

Cited by 36 publications

References 48 publications

Recent Advances in 2D Rare Earth Materials

Recent Advances in 2D Rare Earth Materials

Interactions of Na₂SO₄ and yttrium‐silicate environmental barrier coatings at 825°C

Perspective Chapter: The Application of Yttria-Stabilized Zirconia (YSZ)

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Hot-corrosion resistance and phase stability of Yb2O3–Gd2O3–Y2O3 costabilized zirconia-based thermal barrier coatings against Na2SO4 + V2O5 molten salts

Cited by 36 publications

References 48 publications

Recent Advances in 2D Rare Earth Materials

Recent Advances in 2D Rare Earth Materials

Interactions of Na2SO4 and yttrium‐silicate environmental barrier coatings at 825°C

Perspective Chapter: The Application of Yttria-Stabilized Zirconia (YSZ)

Contact Info

Product

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Interactions of Na₂SO₄ and yttrium‐silicate environmental barrier coatings at 825°C