Thermal cyclic oxidation performance of plasma sprayed zirconia thermal barrier coatings with modified high velocity oxygen fuel sprayed bond coatings

Tsai, Pi‐Chuen; Tseng, Chun-Feng; Yang, Chung-Wei; Kuo, I. C.; Chou, Yia-Ling; Lee, Jyh-Wei

doi:10.1016/j.surfcoat.2012.10.004

Cited by 20 publications

(4 citation statements)

References 35 publications

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“…In Figures 7 and 8, one can see that the R-TBC system is characterized by more extensive thermally grown oxide formation in the bond coat and top coat interface and more evident delamination cracking along the YSZ TC near to the BC/TC interface, in comparison to the Al-TBC system. This proportional connection is a typical phenomenon and has been reported [26][27][28][29]. Based on this, the possibility to stabilize and slow down the TGO growth using an Al interlayer seems to be a promising approach to increase the lifetime of TBC systems.…”

Section: Tgo Thickness and Cracks Measurementsmentioning

confidence: 55%

Study on the Characteristics of a TBC System Containing a PVD-Al Interlayer under Isothermal Loading

et al. 2021

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In this work, the oxidation behavior of an atmospheric plasma-sprayed thermal barrier coating (TBC) system with a thin Al physical vapor deposition (PVD) film deposited over the bond coat is discussed. The TBC consisted of: (i) CoNiCrAlY bond coat sprayed on the Inconel 600 substrate; (ii) a thin Al interlayer deposited by direct current DC magnetron sputtering; and (iii) yttria-stabilized zirconia (YSZ) sprayed as the top coat. Such thermal barrier coatings (Al-TBC) were isothermally oxidized at 1150 °C with different holding times, and then they were compared with the reference TBC (R-TBC) systems without an Al interlayer (R-TBC). Scanning electron microscopy with energy-dispersive X-ray analysis was used to study the oxide formation along the bond coat (BC) and top coat (TC) interface, as well as crack formation in the yttria-stabilized zirconia top coat. Then, using Image Analysis, the oxide formation and crack formation were characterized in all specimens after a slow heating and cooling cycle, and after 100, 300, and 600 h of isothermal exposure. The results showed that the Al-TBC system proposed here exhibits higher oxidation resistance at the bond coat and top coat interface, less crack formation in the YSZ top coat, and enhanced mechanical stability compared to the conventional TBCs. It was found that enrichment of the bond coat and top coat interface with Al limited the formation of detrimental transition metal oxides during isothermal loading. Finally, the corresponding failure caused by thermally grown oxide (TGO) phenomena is “mixed failure mode” for both studied TBCs.

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Section: Tgo Thickness and Cracks Measurementsmentioning

confidence: 55%

Study on the Characteristics of a TBC System Containing a PVD-Al Interlayer under Isothermal Loading

et al. 2021

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“…Subsequently, ceramic top coating based on yttria stabilized zirconia is deposited above the bond coat. The top coat protects bond coat and substrate against high temperature oxidation and increase the lifetime of the whole part [5][6][7][8]. The typical failure mechanism for cyclic oxidation is delamination of top coat at the top coat/bond coat interface due to oxidation of metallic bond coat and growing of thermally grown oxide at this interface [9,10].…”

Section: Introductionmentioning

confidence: 99%

Thermal Cyclic Behaviour of Conventional YSZ and Mullite-YSZ Thermal Barrier Coatings

Jech

Komarov

Remešová

et al. 2020

DDF

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Nowadays commonly used thermal barrier coatings (TBC) are based on yttria stabilized zirconia (YSZ). Addition of mullite phase into the YSZ coating can improve resulting high temperature properties. The contribution focuses on high temperature cyclic oxidation behaviour of two TBC systems with different top coats (TC) deposited by the means of atmospheric plasma spraying. The initial mullite-YSZ powder mixture consisted of 29 vol. % of mullite and 71 vol. % of YSZ. The conventional TBC system consisted of ~ 150 µm thick NiCoCrAlYHfSi bond coat (BC) and ~ 300 µm thick YSZ top coat. The experimental mullite-YSZ (MYSZ) TBC system consisted of ~ 150 µm thick NiCoCrAlYHfSi bond coat, ~ 100 µm thick YSZ interlayer and ~ 200 µm thick mullite-YSZ top coat. The experimental TBC proved higher lifetime, durability and phase stability and also lower grow rate of thermally grown oxide (TGO) compared to conventional TBC. Lifetime, phase stability and changes in the microstructure of TBCs after the furnace cyclic oxidation test were evaluated by the means of scanning electron microscopy equipped with EDX analyzer and X-ray diffraction techniques. Oxidation kinetics of TGO was calculated based on thickness determined utilizing digital image analysis.

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“…Plasma spray [2] and EB-PVD [3] techniques are applied to produce YSZ coatings. On the other hand electrophoretic deposition (EPD) has received attention due to its high versatility for application of different materials, simplicity in setup, low equipment cost, little restriction of the shape of substrate and capability to form complex shapes and patterns at low temperatures [4,5].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Electrophoretic Deposition of YSZ

Oskay

Demirel

2018

Acta Phys. Pol. A

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Electrophoretic deposition has acquired increasing interest for its outstanding potential to produce thick ceramic coatings on complex-shaped substrates. This makes electrophoretic deposition a promising technique to obtain ceramic coatings for several applications such as solid oxide fuel cells, thermal barrier coatings and biomaterials. Response surface methodology was used to model and optimize the electrophoretic deposition process. Three mathematical models were derived to understand the kinetics of electrophoretic deposition. The optimization results showed that applied voltage had significant effects on the packing density of YSZ particles.

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Thermal cyclic oxidation performance of plasma sprayed zirconia thermal barrier coatings with modified high velocity oxygen fuel sprayed bond coatings

Cited by 20 publications

References 35 publications

Study on the Characteristics of a TBC System Containing a PVD-Al Interlayer under Isothermal Loading

Study on the Characteristics of a TBC System Containing a PVD-Al Interlayer under Isothermal Loading

Thermal Cyclic Behaviour of Conventional YSZ and Mullite-YSZ Thermal Barrier Coatings

Optimization of Electrophoretic Deposition of YSZ

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