Thermal behavior and mechanical properties of Y2SiO5 environmental barrier coatings after isothermal heat treatment

Byung Koog Jang, Fan Jie Feng, Kee Sung Lee, Eugenio García, Andrés Nistal, Nobuo Nagashima, Seongwon Kim, Yoon Suk Oh, Hyung Tae Kim

研究成果: ジャーナルへの寄稿記事

抄録

Y2SiO5 coatings are deposited by a flame-spray technique as protection layer on SiC substrates to prevent oxidation and steam corrosion. In this research, Y2SiO5 coatings were isothermally heat treated at different temperatures and different exposure times in a laboratory environment. The thermal behaviors such as phase transformation, microstructural change and thermally grown oxide (TGO) formation have been examined by XRD, SEM, and EDS analysis. Different modes of TGO growth behavior were found at different temperatures. In addition, the mechanical properties were evaluated by a Martens hardness tester. The results show that the change of microstructure and composition is not too critical, but higher temperatures and longer heating times do lead to the formation of Y2SiO5 crystalline phases and a β-Y2O3 phase. Thus, the isothermal heat treatment improves the hardness and elastic modulus of Y2SiO5 coatings.

元の言語英語
ページ(範囲)24-30
ページ数7
ジャーナルSurface and Coatings Technology
308
DOI
出版物ステータス出版済み - 12 25 2016

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heat treatment
Heat treatment
mechanical properties
coatings
Coatings
Mechanical properties
Oxides
hardness
Hardness
oxides
Steam
test equipment
steam
Temperature
sprayers
phase transformations
Energy dispersive spectroscopy
flames
modulus of elasticity
critical temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

これを引用

Thermal behavior and mechanical properties of Y2SiO5 environmental barrier coatings after isothermal heat treatment. / Jang, Byung Koog; Feng, Fan Jie; Lee, Kee Sung; García, Eugenio; Nistal, Andrés; Nagashima, Nobuo; Kim, Seongwon; Oh, Yoon Suk; Kim, Hyung Tae.

:: Surface and Coatings Technology, 巻 308, 25.12.2016, p. 24-30.

研究成果: ジャーナルへの寄稿記事

Jang, Byung Koog ; Feng, Fan Jie ; Lee, Kee Sung ; García, Eugenio ; Nistal, Andrés ; Nagashima, Nobuo ; Kim, Seongwon ; Oh, Yoon Suk ; Kim, Hyung Tae. / Thermal behavior and mechanical properties of Y2SiO5 environmental barrier coatings after isothermal heat treatment. :: Surface and Coatings Technology. 2016 ; 巻 308. pp. 24-30.
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abstract = "Y2SiO5 coatings are deposited by a flame-spray technique as protection layer on SiC substrates to prevent oxidation and steam corrosion. In this research, Y2SiO5 coatings were isothermally heat treated at different temperatures and different exposure times in a laboratory environment. The thermal behaviors such as phase transformation, microstructural change and thermally grown oxide (TGO) formation have been examined by XRD, SEM, and EDS analysis. Different modes of TGO growth behavior were found at different temperatures. In addition, the mechanical properties were evaluated by a Martens hardness tester. The results show that the change of microstructure and composition is not too critical, but higher temperatures and longer heating times do lead to the formation of Y2SiO5 crystalline phases and a β-Y2O3 phase. Thus, the isothermal heat treatment improves the hardness and elastic modulus of Y2SiO5 coatings.",
author = "Jang, {Byung Koog} and Feng, {Fan Jie} and Lee, {Kee Sung} and Eugenio Garc{\'i}a and Andr{\'e}s Nistal and Nobuo Nagashima and Seongwon Kim and Oh, {Yoon Suk} and Kim, {Hyung Tae}",
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T1 - Thermal behavior and mechanical properties of Y2SiO5 environmental barrier coatings after isothermal heat treatment

AU - Jang, Byung Koog

AU - Feng, Fan Jie

AU - Lee, Kee Sung

AU - García, Eugenio

AU - Nistal, Andrés

AU - Nagashima, Nobuo

AU - Kim, Seongwon

AU - Oh, Yoon Suk

AU - Kim, Hyung Tae

PY - 2016/12/25

Y1 - 2016/12/25

N2 - Y2SiO5 coatings are deposited by a flame-spray technique as protection layer on SiC substrates to prevent oxidation and steam corrosion. In this research, Y2SiO5 coatings were isothermally heat treated at different temperatures and different exposure times in a laboratory environment. The thermal behaviors such as phase transformation, microstructural change and thermally grown oxide (TGO) formation have been examined by XRD, SEM, and EDS analysis. Different modes of TGO growth behavior were found at different temperatures. In addition, the mechanical properties were evaluated by a Martens hardness tester. The results show that the change of microstructure and composition is not too critical, but higher temperatures and longer heating times do lead to the formation of Y2SiO5 crystalline phases and a β-Y2O3 phase. Thus, the isothermal heat treatment improves the hardness and elastic modulus of Y2SiO5 coatings.

AB - Y2SiO5 coatings are deposited by a flame-spray technique as protection layer on SiC substrates to prevent oxidation and steam corrosion. In this research, Y2SiO5 coatings were isothermally heat treated at different temperatures and different exposure times in a laboratory environment. The thermal behaviors such as phase transformation, microstructural change and thermally grown oxide (TGO) formation have been examined by XRD, SEM, and EDS analysis. Different modes of TGO growth behavior were found at different temperatures. In addition, the mechanical properties were evaluated by a Martens hardness tester. The results show that the change of microstructure and composition is not too critical, but higher temperatures and longer heating times do lead to the formation of Y2SiO5 crystalline phases and a β-Y2O3 phase. Thus, the isothermal heat treatment improves the hardness and elastic modulus of Y2SiO5 coatings.

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