Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD

Hongbo Guo; Shengkai Gong; Huibin Xu

Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD

Hongbo Guo
, Shengkai Gong
, Huibin Xu^*

^*Corresponding author for this work

School of Materials Science and Engineering

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

5 Scopus citations

Abstract

The performances of gradient thermal barrier coatings (GTBCs) produced by EB-PVD were evaluated by isothermal oxidation and cyclic hot corrosion (HTHC) tests. Compared with conventional two-layered TBCs, the GTBCs exhibit better resistance to oxidation and hot-corrosion. A dense Al₂O₃ layer in the GTBCs effectively prohibits the 0 and S inward diffusion and the Al and Cr outward diffusion during the tests. On the other hand, an inlaid interface, resulting from the oxidation of the Al along the columnar grains of the bond coat, enhances the adherence of the Al₂O₃ layer. The failure of the GTBC can finally occur by cracking at the interface between the bond coat and the Al₂O₃ layer, due to the combined effect of sulfidation of the bond coat and thermal cycling.

Original language	English
Pages (from-to)	27-30
Number of pages	4
Journal	Journal of Materials Science and Technology
Volume	18
Issue number	1
State	Published - Jan 2002

Keywords

Electron bean physical vapor deposition (EB-PVD)
Gradient thermal barrier coating (GTBC)
Hot corrosion (HC)

Cite this

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title = "Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD",

abstract = "The performances of gradient thermal barrier coatings (GTBCs) produced by EB-PVD were evaluated by isothermal oxidation and cyclic hot corrosion (HTHC) tests. Compared with conventional two-layered TBCs, the GTBCs exhibit better resistance to oxidation and hot-corrosion. A dense Al2O3 layer in the GTBCs effectively prohibits the 0 and S inward diffusion and the Al and Cr outward diffusion during the tests. On the other hand, an inlaid interface, resulting from the oxidation of the Al along the columnar grains of the bond coat, enhances the adherence of the Al2O3 layer. The failure of the GTBC can finally occur by cracking at the interface between the bond coat and the Al2O3 layer, due to the combined effect of sulfidation of the bond coat and thermal cycling.",

keywords = "Electron bean physical vapor deposition (EB-PVD), Gradient thermal barrier coating (GTBC), Hot corrosion (HC)",

author = "Hongbo Guo and Shengkai Gong and Huibin Xu",

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language = "英语",

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T1 - Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD

AU - Guo, Hongbo

AU - Gong, Shengkai

AU - Xu, Huibin

PY - 2002/1

Y1 - 2002/1

N2 - The performances of gradient thermal barrier coatings (GTBCs) produced by EB-PVD were evaluated by isothermal oxidation and cyclic hot corrosion (HTHC) tests. Compared with conventional two-layered TBCs, the GTBCs exhibit better resistance to oxidation and hot-corrosion. A dense Al2O3 layer in the GTBCs effectively prohibits the 0 and S inward diffusion and the Al and Cr outward diffusion during the tests. On the other hand, an inlaid interface, resulting from the oxidation of the Al along the columnar grains of the bond coat, enhances the adherence of the Al2O3 layer. The failure of the GTBC can finally occur by cracking at the interface between the bond coat and the Al2O3 layer, due to the combined effect of sulfidation of the bond coat and thermal cycling.

AB - The performances of gradient thermal barrier coatings (GTBCs) produced by EB-PVD were evaluated by isothermal oxidation and cyclic hot corrosion (HTHC) tests. Compared with conventional two-layered TBCs, the GTBCs exhibit better resistance to oxidation and hot-corrosion. A dense Al2O3 layer in the GTBCs effectively prohibits the 0 and S inward diffusion and the Al and Cr outward diffusion during the tests. On the other hand, an inlaid interface, resulting from the oxidation of the Al along the columnar grains of the bond coat, enhances the adherence of the Al2O3 layer. The failure of the GTBC can finally occur by cracking at the interface between the bond coat and the Al2O3 layer, due to the combined effect of sulfidation of the bond coat and thermal cycling.

KW - Electron bean physical vapor deposition (EB-PVD)

KW - Gradient thermal barrier coating (GTBC)

KW - Hot corrosion (HC)

UR - https://www.scopus.com/pages/publications/0036374456

M3 - 文章

AN - SCOPUS:0036374456

SN - 1005-0302

VL - 18

SP - 27

EP - 30

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

IS - 1

ER -

Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD

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Keywords

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