Preparation of YSZ/Al2O3 micro-laminated coatings and their influence on the oxidation and spallation resistance of MCrAlY alloys

Gao, Junguo; He, Yedong; Wang, Deren

doi:10.1016/j.jeurceramsoc.2010.08.010

Cited by 28 publications

(9 citation statements)

References 22 publications

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“…The uncoated specimen (Fig. a) emerged with a single phase of iron peaks assigned to the characteristics of the mild steel (EN3) specimen based on the previous report . However, after heat‐treated at 600°C for 6 h, the coated specimen (Fig.…”

Section: Resultsmentioning

confidence: 72%

“…The superimposed nanostructure coating provides a better thermal insulating barrier and effectively suppresses the corrosion‐oxidizing species on the specimen at high temperature with minimum surface deterioration. The degree of surface delamination coating depends on decomposition and diffusion of elements from substrate . The high‐temperature retardant behavior of Al 2 O 3 ‐ZrO 2 hybrid silicate coatings are due to the presence of thin films of adherent oxide and critical grain size that entraps the metallic ions on the EN3 mild steel substrate.…”

Section: Resultsmentioning

confidence: 99%

“…[5][6][7][8] However, it loses its phase stability that is accompanied by volumetric shrinkage when it is exposed to high temperature as in refractory applications 9 because of its high oxygen diffusivity. 10 Hence, to improve the phase stability, a different approach for the incorporation of ZrO 2 in alumina (Al 2 O 3 ) matrix is eventually required. The composite materials provide positive and improved physico-chemical properties as compared to individual components.…”

Section: Introductionmentioning

confidence: 99%

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Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating

Karthik¹,

Manivasakan²,

Arunmetha³

et al. 2013

Int J Applied Ceramic Tech

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Al2O3‐stabilized tetragonal ZrO2 nanoparticles were obtained through hot‐air spray pyrolysis and characterized after postsynthesized treatments. The produced nanoparticles were 26 nm in size with surface area of 59 m2/g. A multilayer thermal barrier coating of nanostructured Al2O3‐ZrO2‐embedded silicate was applied to the mild steel (EN3) specimen using spin‐coating technique and characterized comprehensively employing X‐ray diffraction and scanning electron microscope. The Al2O3‐stabilized ZrO2 with silicate matrix facilitates the formation of zirconium silicate nanostructured surface‐protective coating on EN3 specimen. The Al2O3‐ZrO2/SiO2 matrix‐based hybrid inorganic coating shows effective thermal barrier for EN3 after firing at a high temperature of 600°C.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating

Karthik¹,

Manivasakan²,

Arunmetha³

et al. 2013

Int J Applied Ceramic Tech

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“…Furthermore, the oxidation resistance of TBC is gradually reduced because of the consumption of Al and Cr in the bond coat [8]. Most research related to the oxidation resistance of TBC focuses mainly on the growth behaviors of Al 2 O 3 [9][10][11]. It is reported by Keyvani [10] that non-protective oxides are formed rapidly at the initial oxidation stage and the growth of TGO is under the diffusion control; and the effects of diffusion rate on the oxidation of Cr and Co in the Ni alloy are studied in detail by Allen [12].…”

Section: Introductionmentioning

confidence: 99%

Influences of Cr and Co on the Growth of Thermally Grown Oxide in Thermal Barrier Coating during High-Temperature Exposure

Zhang

Wang

et al. 2018

Coatings

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Thermal barrier coating (TBC) is a critical material in the aerospace domain to increase the lifetime of gas turbine components subjected to thermal load. The properties of TBC are strongly related to the growth of thermally grown oxide (TGO) whose main constituent is Al 2 O 3 . However, the oxidation of Cr and Co can affect the growth of TGO, which is not studied sufficiently. In this paper, high-temperature exposure at 1000 • C was performed to investigate the effect of Cr and Co oxides on TGO growth. The morphology and composition analysis of the interface between the ceramic top coat and the bond coat (TC/BC) were investigated by using scanning electron microscopy (SEM) and the energy dispersion spectrum (EDS). The thermodynamics and kinetics of oxidation were analyzed. The results indicated that the oxidation kinetics basically followed the sub-parabolic law with exposure time. Additionally, the major factor affecting the formation of oxides was the diffusion rate at the initial stage of exposure, then oxides depended on thermodynamics, and the oxidation was influenced by both of them in the last stage. The major elements to be oxidized were different at different stages. Moreover, the replacement reaction of Cr 2 O 3 and the phase conversion of Al 2 O 3 resulted in thickness variations of the TGO and Al-depleted zone during high-temperature exposure.

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“…In order to improve the corrosion resistance of carbon steel, they are often alloyed or surface treated with more corrosion resistance metals, such as Zn, Sn, Co, Ni, etc. MCrAlY (M = Ni and/or Co) coating are widely used to protect and other hot component against high temperature oxidation and hot corrosion, either as overlay as bond coat for termal barrier coating (TBC) [3]. One key properties of the bond coat as its ability to provide a slow growing oxide layer.…”

Section: Introductionmentioning

confidence: 99%

The influence of Cr and Al pack cementation on low carbon steel to improve oxidation resistance

Prasetya¹,

Sugiarti²,

Destyorini³

et al. 2012

AIP Conference Proceedings

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Articles you may be interested inHigh-corrosion-resistant Al 2 O 3 passivation-film formation by selective oxidation on austenitic stainless steel containing Al J. Vac. Sci. Technol. A 29, 021002 (2011); 10.1116/1.3543709Off-axis deposition of Al layer for low resistance tunnel barrier Abstract. Pack chromizing and aluminizing has been widely used for many years to improve hot temperature oxidation and corrosion resistance of metals. The coating process involves packing the steel in a powder mixture which contain aluminum and chromium source, and inert filler (usually alumina), and halide activator NH 4 Cl. Al and Cr were deposited onto carbon steel by pack cementation process using elemental Al and Cr powder as Al and Cr source, whereas NiCo alloys codeposited by electrodeposition. The position of Al and Cr could be under or over Ni-Co alloys deposited. Pack cementation was heated on dry inert gas at temperature 800 o C about 5 hours and 20 minute for Cr and Al respectively. Al and Cr was successfully deposited. Laying down effect of Al and Cr onto carbon steel whether up and down toward NiCo alloys coating have affected to oxidation resistance. The pack aluminizing as top layer given best resitance to restrain excessive oxide scale, in contrast pack chromizing reveal bad oxidation resistance, moreover occured spallation on layer.

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Preparation of YSZ/Al2O3 micro-laminated coatings and their influence on the oxidation and spallation resistance of MCrAlY alloys

Cited by 28 publications

References 22 publications

Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating

Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating

Influences of Cr and Co on the Growth of Thermally Grown Oxide in Thermal Barrier Coating during High-Temperature Exposure

The influence of Cr and Al pack cementation on low carbon steel to improve oxidation resistance

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Preparation of YSZ/Al2O3 micro-laminated coatings and their influence on the oxidation and spallation resistance of MCrAlY alloys

Cited by 28 publications

References 22 publications

Production of Al2O3‐Stabilized Tetragonal ZrO2 Nanoparticles for Thermal Barrier Coating

Production of Al2O3‐Stabilized Tetragonal ZrO2 Nanoparticles for Thermal Barrier Coating

Influences of Cr and Co on the Growth of Thermally Grown Oxide in Thermal Barrier Coating during High-Temperature Exposure

The influence of Cr and Al pack cementation on low carbon steel to improve oxidation resistance

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Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating

Production of Al₂O₃‐Stabilized Tetragonal ZrO₂ Nanoparticles for Thermal Barrier Coating