Preparation of plasma sprayed nanostructured GdPO4 thermal barrier coating and its hot corrosion behavior in molten salts

Li, Mingzhu; Cheng, Yuxiang; Guo, Liu; Zhang, Chenglong; Zhang, Yuchen; He, Sixian; Ye, Fuxing

doi:10.1016/j.ceramint.2017.03.092

Cited by 25 publications

(5 citation statements)

References 44 publications

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“…To further prove the phase constitution of coatings of YSZ and YYG, Figure 3 shows diagrams of the Raman shift of the coatings, respectively. The Raman signal from cubic zirconia is weaker than that from tetragonal zirconia; however, the sensitivity of the monoclinic phase in Raman spectroscopy is much higher than that in XRD [31,32]. The irreducible representation for optical and acoustical zone center phonons can be determined by a group theory analysis [33].…”

Section: Xrd Analysis Of Powders and Coatingsmentioning

confidence: 99%

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Ai,

Wang,

Yang

et al. 2023

Coatings

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Thermal barrier coatings have been used to protect superalloys under extremely harsh conditions. The durability of TBCs with a NiCoCrAlY bond layer prepared via the air plasma spray process and an ultrathin dense layer prepared via magnetron sputtering was investigated under different corrosion conditions. This paper discusses the corrosion resistance improvement mechanism of TBCs with a dense layer produced by magnetron sputtering under corrosion conditions with environmental contaminants such as calcium–magnesium–aluminum–silicon oxide systems (CMAS) at 1300 °C and NaCl-Na2SO4-V2O5 (NV) at 900 °C. The corrosion results show that CMAS will react with the stabilizers of zirconium oxide, which will change the rate of the phase transition, as determined via X-ray diffraction tests. A thermal ablation test verified that TBCs with a dense layer have a better corrosion resistance and better thermal insulation properties. All results show that preparing TBCs with a dense layer via the magnetron sputtering method will be an efficient method to improve TBCs’ properties at high temperatures in the future.

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Section: Xrd Analysis Of Powders and Coatingsmentioning

confidence: 99%

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Ai,

Wang,

Yang

et al. 2023

Coatings

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“…Currently, the most widely used TBC material is 7-8% of yttria (Y2O3)stabilized zirconia (YSZ) due to its low thermal conductivity, good thermo-mechanical properties and compatible coefficient of thermal expansion with the bonding layer [1]. When operated over an extended period of time at temperatures exceeding 1200 °C, the YSZ will experience significant phase transition and sintering [2,3]. With the increasing inlet temperature of gas turbines, the conventional YSZ cannot satisfy the industrial requirements of advanced engines.…”

Section: Introductionmentioning

confidence: 99%

“…However, limited research was carried out on the LYZ coating's hot corrosion behaviors. Previous studies mainly focused on the molten salts, which were the mixed Na2SO4+V2O5 salt with a molar ratio of 1:1 [2,13]. Variations in the relative content of V2O5 and Na2SO4 could cause effect on the hot corrosion of TBCs, which requires further exploration.…”

Section: Introductionmentioning

confidence: 99%

Hot corrosion behaviours of the LaYbZr₂O₇ thermal barrier coatings in different corrosive salts

Yan,

Xiang,

Lei

et al. 2024

J. Phys.: Conf. Ser.

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In this study, the LaYbZr2O7 (LYZ) thermal barrier coatings (TBCs) were deposited by air plasma spray (APS) and were subjected to hot corrosion in the single V2O5 salts and the mixture of V2O5+Na2SO4 with different Na2SO4 content at 1000 °C. The reaction mechanism and corrosion layer evolution of the LYZ coating in different corrosive molten were comparatively investigated. After hot corrosion in the single V2O5 salt, the surface of the LYZ coating develops a dense corrosion layer, which could keep structural integrity with the extension of exposure time, indicating the LYZ coating showed higher resistance to the V2O5 corrosion. However, the dense layer failed to form on the surface of the LYZ coating in the V2O5+Na2SO4 mixed salts. With the increase of Na2SO4 content, the corrosion products formed on the surface of the LYZ coating gradually decreased, and the corrosion layer disappeared. The dominant reason for the difference was that the addition of Na2SO4 resulted in the acidity reduction of the mixed salts, which eventually caused a decrease in the corrosion rate. Compared with the single V2O5, the V2O5+Na2SO4 mixed salts showed higher penetration ability in the LYZ coating and could be more damaging.

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“…Various branches of modern industry require materials with thermal insulation and barrier properties [6][7][8][9]. In this regard, rare earth element (RE) orthophosphates with monazite and zircon type structures are promising [10][11][12][13][14]. Monazites structured RE orthophosphates have a high melting temperature (T m ∼2173-2345 K) [15,16], low water solubility [17], high isomorphic capacity [18][19][20][21], resistance to aggressive media [22] and radiation damage [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…A thorough study of the mechanisms of formation and stability of RE orthophosphate phases will help broaden their potential application in modern technology. At present, the obtaining of monazite REPO 4 (RE= La -Gd) based materials are aimed at producing composites for the radioactive waste form [21,[36][37][38][39], thermal barrier coatings [11,12], and for the manufacture of luminescent materials [26,40].…”

Section: Introductionmentioning

confidence: 99%

The influence of condition of the monazite structured La0.9Y0.1PO4 nanocrystals sintering on thermal and mechanical properties of the material

Enikeeva¹,

Проскурина²,

Motaylo³

et al. 2021

Nanosystems: Phys. Chem. Math.

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A lanthanum orthophosphate-and yttrium-based monazite structured La 0.9 Y 0.1 PO 4 nanocrystalline material was synthesized. The influence of the thermal treatment temperature on its thermal and mechanical properties has been determined. It was shown that the hydrothermal treatment of coprecipitated phosphates at 230 • C for 110 minutes yielded monazite structured nanoparticles with the crystallite size of about 16 nm. Nanopowder thermal treatment for 20 min in the annealing-quenching mode at 1000-1400 • C resulted in obtaining compact materials, the porosity of which varied from 52 to 27% with the grain growth from ∼20 to ∼100 nm. Active sintering occurred at temperatures above 1300 • C. Nanocrystalline materials obtained by heat treatment at 1200 • C with a grain size of ∼40 nm have a porosity of 42%, microhardness of Hv(25 • C) = 4±0.5 GPa, thermal conductivity λ(25 • C) = 0.4 W•m −1 •K −1 , and can be used as thermal insulation material.

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Preparation of plasma sprayed nanostructured GdPO4 thermal barrier coating and its hot corrosion behavior in molten salts

Cited by 25 publications

References 44 publications

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Hot corrosion behaviours of the LaYbZr₂O₇ thermal barrier coatings in different corrosive salts

The influence of condition of the monazite structured La0.9Y0.1PO4 nanocrystals sintering on thermal and mechanical properties of the material

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Preparation of plasma sprayed nanostructured GdPO4 thermal barrier coating and its hot corrosion behavior in molten salts

Cited by 25 publications

References 44 publications

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Effects of Top Ceramic Layers with an Ultrathin Dense Layer on the Thermal–Physical Properties of Thermal Barrier Coatings

Hot corrosion behaviours of the LaYbZr2O7 thermal barrier coatings in different corrosive salts

The influence of condition of the monazite structured La0.9Y0.1PO4 nanocrystals sintering on thermal and mechanical properties of the material

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Hot corrosion behaviours of the LaYbZr₂O₇ thermal barrier coatings in different corrosive salts