Columnar and DVC-structured thermal barrier coatings deposited by suspension plasma spray: high-temperature stability and their corrosion resistance to the molten salt

Xiaolong Chen; Takuma Ohnuki; Seiji Kuroda; Maciej Gizynski; Hiroshi Araki; Hideyuki Murakami; Makoto Watanabe; Yoshio Sakka

doi:10.1016/j.ceramint.2016.07.174

Columnar and DVC-structured thermal barrier coatings deposited by suspension plasma spray: high-temperature stability and their corrosion resistance to the molten salt

Xiaolong Chen, Takuma Ohnuki, Seiji Kuroda^*, Maciej Gizynski, Hiroshi Araki, Hideyuki Murakami, Makoto Watanabe, Yoshio Sakka

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

High-temperature stability of SPS YSZ coatings with the columnar and deep vertically cracked (DVC) structures and their corrosion resistance to 56 wt% V₂O₅+44 wt% Na₂SO₄ molten salt mixture were investigated. Both the columnar and DVC-structured YSZ coatings were sintered at 1000 °C, but a significant increase in porosity in combination with significant reductions in Vickers’ hardness and Young's modulus were observed at the temperatures from 1200 °C to 1400 °C. The DVC-structured YSZ coating exhibited superior corrosion resistance against the molten salt mixture attack to the columnar-structured one due to its higher density behaving as a sealing protective top layer at 950 °C.

Original language	English
Pages (from-to)	16822-16832
Number of pages	11
Journal	Ceramics International
Volume	42
Issue number	15
DOIs	https://doi.org/10.1016/j.ceramint.2016.07.174
Publication status	Published - 2016 Nov 15
Externally published	Yes

Keywords

Corrosion
Plasma spraying
Suspension
Thermal barrier coating
YSZ

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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Chen, X, Ohnuki, T, Kuroda, S, Gizynski, M, Araki, H, Murakami, H, Watanabe, M & Sakka, Y 2016, 'Columnar and DVC-structured thermal barrier coatings deposited by suspension plasma spray: high-temperature stability and their corrosion resistance to the molten salt', Ceramics International, vol. 42, no. 15, pp. 16822-16832. https://doi.org/10.1016/j.ceramint.2016.07.174

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title = "Columnar and DVC-structured thermal barrier coatings deposited by suspension plasma spray: high-temperature stability and their corrosion resistance to the molten salt",

abstract = "High-temperature stability of SPS YSZ coatings with the columnar and deep vertically cracked (DVC) structures and their corrosion resistance to 56 wt% V2O5+44 wt% Na2SO4 molten salt mixture were investigated. Both the columnar and DVC-structured YSZ coatings were sintered at 1000 °C, but a significant increase in porosity in combination with significant reductions in Vickers{\textquoteright} hardness and Young's modulus were observed at the temperatures from 1200 °C to 1400 °C. The DVC-structured YSZ coating exhibited superior corrosion resistance against the molten salt mixture attack to the columnar-structured one due to its higher density behaving as a sealing protective top layer at 950 °C.",

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author = "Xiaolong Chen and Takuma Ohnuki and Seiji Kuroda and Maciej Gizynski and Hiroshi Araki and Hideyuki Murakami and Makoto Watanabe and Yoshio Sakka",

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doi = "10.1016/j.ceramint.2016.07.174",

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T2 - high-temperature stability and their corrosion resistance to the molten salt

AU - Chen, Xiaolong

AU - Ohnuki, Takuma

AU - Kuroda, Seiji

AU - Gizynski, Maciej

AU - Araki, Hiroshi

AU - Murakami, Hideyuki

AU - Watanabe, Makoto

AU - Sakka, Yoshio

PY - 2016/11/15

Y1 - 2016/11/15

N2 - High-temperature stability of SPS YSZ coatings with the columnar and deep vertically cracked (DVC) structures and their corrosion resistance to 56 wt% V2O5+44 wt% Na2SO4 molten salt mixture were investigated. Both the columnar and DVC-structured YSZ coatings were sintered at 1000 °C, but a significant increase in porosity in combination with significant reductions in Vickers’ hardness and Young's modulus were observed at the temperatures from 1200 °C to 1400 °C. The DVC-structured YSZ coating exhibited superior corrosion resistance against the molten salt mixture attack to the columnar-structured one due to its higher density behaving as a sealing protective top layer at 950 °C.

AB - High-temperature stability of SPS YSZ coatings with the columnar and deep vertically cracked (DVC) structures and their corrosion resistance to 56 wt% V2O5+44 wt% Na2SO4 molten salt mixture were investigated. Both the columnar and DVC-structured YSZ coatings were sintered at 1000 °C, but a significant increase in porosity in combination with significant reductions in Vickers’ hardness and Young's modulus were observed at the temperatures from 1200 °C to 1400 °C. The DVC-structured YSZ coating exhibited superior corrosion resistance against the molten salt mixture attack to the columnar-structured one due to its higher density behaving as a sealing protective top layer at 950 °C.

KW - Corrosion

KW - Plasma spraying

KW - Suspension

KW - Thermal barrier coating

KW - YSZ

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JF - Ceramics International

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Columnar and DVC-structured thermal barrier coatings deposited by suspension plasma spray: high-temperature stability and their corrosion resistance to the molten salt

Abstract

Keywords

ASJC Scopus subject areas

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