Hot corrosion behavior of plasma sprayed 4 mol% Y2O 3-ZrO2 thermal barrier coatings with volcanic Ash

Won Jun Lee, Byung Koog Jang, Dae Soon Lim, Yoon Suk Oh, Seong Won Kim, Hyung Tae Kim, Hiroshi Araki, Hideyuki Murakami, Seiji Kuroda

研究成果: Article

6 引用 (Scopus)

抄録

The hot corrosion behavior of plasma sprayed 4 mol% Y2O 3-ZrO2 (YSZ) thermal barrier coatings (TBCs) with volcanic ash is investigated. Volcanic ash that deposited on the TBCs in gas-turbine engines can attack the surface of TBCs itself as a form of corrosive melt. YSZ coating specimens with a thickness of 430-440 μm are prepared using a plasma spray method. These specimens are subjected to hot corrosion environment at 1200°C with five different duration time, from 10 mins to 100 h in the presence of corrosive melt from volcanic ash. The microstructure, composition, and phase analysis are performed using Field emission scanning electron microscopy, including Energy dispersive spectroscopy and X-ray diffraction. After the heat treatment, hematite (Fe2O3-TiO2) and monoclinic YSZ phases are found in TBCs. Furthermore the interface area between the molten volcanic ash layers and YSZ coatings becomes porous with increases in the heat treatment time as the YSZ coatings dissolved into molten volcanic ash. The maximum thickness of this a porous reaction zone is 25 μm after 100 h of heat treatment.

元の言語English
ページ(範囲)353-358
ページ数6
ジャーナルJournal of the Korean Ceramic Society
50
発行部数6
DOI
出版物ステータスPublished - 2013 11 30
外部発表Yes

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Ashes
Volcanic Eruptions
Thermal barrier coatings
Corrosion
Plasmas
Caustics
Heat treatment
Coatings
Molten materials
Hematite
Field emission
Gas turbines
Energy dispersive spectroscopy
Turbines
X ray diffraction
Microstructure
Scanning electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites

これを引用

Hot corrosion behavior of plasma sprayed 4 mol% Y2O 3-ZrO2 thermal barrier coatings with volcanic Ash. / Lee, Won Jun; Jang, Byung Koog; Lim, Dae Soon; Oh, Yoon Suk; Kim, Seong Won; Kim, Hyung Tae; Araki, Hiroshi; Murakami, Hideyuki; Kuroda, Seiji.

:: Journal of the Korean Ceramic Society, 巻 50, 番号 6, 30.11.2013, p. 353-358.

研究成果: Article

Lee, Won Jun ; Jang, Byung Koog ; Lim, Dae Soon ; Oh, Yoon Suk ; Kim, Seong Won ; Kim, Hyung Tae ; Araki, Hiroshi ; Murakami, Hideyuki ; Kuroda, Seiji. / Hot corrosion behavior of plasma sprayed 4 mol% Y2O 3-ZrO2 thermal barrier coatings with volcanic Ash. :: Journal of the Korean Ceramic Society. 2013 ; 巻 50, 番号 6. pp. 353-358.
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abstract = "The hot corrosion behavior of plasma sprayed 4 mol{\%} Y2O 3-ZrO2 (YSZ) thermal barrier coatings (TBCs) with volcanic ash is investigated. Volcanic ash that deposited on the TBCs in gas-turbine engines can attack the surface of TBCs itself as a form of corrosive melt. YSZ coating specimens with a thickness of 430-440 μm are prepared using a plasma spray method. These specimens are subjected to hot corrosion environment at 1200°C with five different duration time, from 10 mins to 100 h in the presence of corrosive melt from volcanic ash. The microstructure, composition, and phase analysis are performed using Field emission scanning electron microscopy, including Energy dispersive spectroscopy and X-ray diffraction. After the heat treatment, hematite (Fe2O3-TiO2) and monoclinic YSZ phases are found in TBCs. Furthermore the interface area between the molten volcanic ash layers and YSZ coatings becomes porous with increases in the heat treatment time as the YSZ coatings dissolved into molten volcanic ash. The maximum thickness of this a porous reaction zone is 25 μm after 100 h of heat treatment.",
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