Thermal shock resistance of thermal barrier coatings for nickel-based superalloy by supersonic plasma spraying

Sun, Jia; Fu, Qiangang; Guannan, Liu; Li, Hejun; Shu, Yongchun; Gao, Fan

doi:10.1016/j.ceramint.2015.04.077

Cited by 37 publications

(4 citation statements)

References 19 publications

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“…MCrAlY coating, serving as oxidation and corrosion resistance coating at high temperature with the protection of dense and continuous alumina, has been widely used in turbine blades to slow down the degradation of substrates [1,2]. The durability and reliability of MCrAlY coating are critically linked to the oxidation behaviour, which is mainly influenced by the chemical composition, microstructure and surface condition, as well as associated with the growth of oxides scale and interdiffusion process [3].…”

Section: Introductionmentioning

confidence: 99%

Growth stress and interdiffusion analysis of NiCoCrAlYTa coating during oxidation

Yang

Zou

Shi

et al. 2020

Surface Engineering

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The NiCoCrAlYTa coating deposited on Ni-based superalloy using arc ion plating (AIP) technology was subjected to isothermal oxidation in air at 1050°C for up to 200 h. The microstructure, oxides scale thickness, growth stress and interface diffusion behaviour were characterized by using scanning electron microscopy, X-ray diffraction, electron probe microanalyser and photo-stimulated luminescence piezo-spectroscopy. The results revealed that the microstructure of oxides scale was predominantly composed of α-Al 2 O 3 with (Y, Ta)-rich oxides and Cr 2 O 3 irregularly distributed during the oxidation process. The oxides scale thickness of NiCoCrAlYTa coating conformed to parabolic law, which indicated the coating had good oxidation resistance. Also, the relationship between the thickness and growth stress, as well as the oxidation time, was studied based on the Clark oxidation theory and Wagner oxidation model, developing a methodology to measure the high-temperature stress in NiCoCrAlYTa coating. The theoretical calculation value of the stress was basically consistent with the value of the experiment, which could effectively predict the growth stress in the coating and help understand the failure mechanism of NiCoCrAlYTa coating during the service life. In the oxidation process, the interdiffusion behaviour occurred at the interface between the oxides scale and the NiCoCrAlYTa coating was also discussed. The diffusion coefficient of typical elements was calculated by using Boltzmann-Matano method, which was helpful to analyse the inner oxidation of the NiCoCrAlYTa coating, providing indepth understanding of the oxidation behaviour.

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Section: Introductionmentioning

confidence: 99%

Growth stress and interdiffusion analysis of NiCoCrAlYTa coating during oxidation

Yang

Zou

Shi

et al. 2020

Surface Engineering

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“…Plasma spraying is widely used to prepare thermal barrier coatings (TBCs) on high-temperature alloys. − The high heat energy provided by plasma flame could melt spraying materials quickly and the solidification of the melted materials would form a lamellar structure coating. , The coating prepared by plasma spraying often exhibits good thermal shock resistance and outstanding oxidation protective ability . Metal silicide, , such as WSi 2 , TiSi 2 , MoSi 2 , and their related alloy, presents excellent physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Silicide Coating Fabricated by HAPC/SAPS Combination to Protect Niobium Alloy from Oxidation

Sun

Guo

et al. 2016

ACS Appl. Mater. Interfaces

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A combined silicide coating, including inner NbSi2 layer and outer MoSi2 layer, was fabricated through a two-step method. The NbSi2 was deposited on niobium alloy by halide activated pack cementation (HAPC) in the first step. Then, supersonic atmospheric plasma spray (SAPS) was applied to obtain the outer MoSi2 layer, forming a combined silicide coating. Results show that the combined coating possessed a compact structure. The phase constitution of the combined coating prepared by HAPC and SAPS was NbSi2 and MoSi2, respectively. The adhesion strength of the combined coating increased nearly two times than that for single sprayed coating, attributing to the rougher surface of the HAPC-bond layer whose roughness increased about three times than that of the grit-blast substrate. After exposure at 1200 °C in air, the mass increasing rate for single HAPC-silicide coating was 3.5 mg/cm(2) because of the pest oxidation of niobium alloy, whereas the combined coating displayed better oxidation resistance with a mass gain of only 1.2 mg/cm(2). Even more, the combined coating could significantly improve the antioxidation ability of niobium based alloy at 1500 °C. The good oxidation resistance of the combined silicide coating was attributed to the integrity of the combined coating and the continuous SiO2 protective scale provided by the oxidation of MoSi2.

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“…In addition, the deposition of high-speed particles on the substrate can generate great jet impact force, which is beneficial for the formation of dense coating with good bonding strength. Sun et al 22 deposited double-layer thermal barrier coatings (TBCs) on nickel-based superalloy by SAPS. Thermal shock resistance of the TBCs between 1473 K and room temperature was investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al . 22 deposited double-layer thermal barrier coatings (TBCs) on nickel-based superalloy by SAPS. Thermal shock resistance of the TBCs between 1473 K and room temperature was investigated.…”

Section: Introductionmentioning

confidence: 99%

Deposition and ablation resistance of HfC-based coatings prepared on SiC-coated C/C composites by supersonic atmospheric plasma spraying

Yang

2016

Advances in Applied Ceramics

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In order to improve the ablation properties of C/C composites, HfC-based coatings with different mass ratios of SiC were deposited on the surface of SiC-coated carbon/carbon composites by supersonic atmospheric plasma spraying. The morphologies and microstructures of the HfCbased coatings were characterised. The ablation resistance test was carried out by oxyacetylene torch. The results show that the as-prepared coatings are multiphase coatings consisting of HfC, HfO 2 , SiC and SiO 2 . The structure of different coatings is dense. After ablation for 60 s, the ablation centre region of coating is smooth without obvious microcrack and pinhole, and no interlaminar crack can be observed at the cross-section. An Hf-Si-O compound oxide layer is generated on the surface of coating, which is beneficial for protecting the C/C composites from being ablated. Meanwhile, the further generated HfSiO 4 can play a pinning effect, which can prevent crack extension.

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Thermal shock resistance of thermal barrier coatings for nickel-based superalloy by supersonic plasma spraying

Cited by 37 publications

References 19 publications

Growth stress and interdiffusion analysis of NiCoCrAlYTa coating during oxidation

Growth stress and interdiffusion analysis of NiCoCrAlYTa coating during oxidation

Silicide Coating Fabricated by HAPC/SAPS Combination to Protect Niobium Alloy from Oxidation

Deposition and ablation resistance of HfC-based coatings prepared on SiC-coated C/C composites by supersonic atmospheric plasma spraying

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