Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy

Hui Huang; Chao Liu; Liyong Ni; Chungen Zhou

doi:10.1007/s12598-011-0363-z

Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy

Hui Huang
, Chao Liu
, Liyong Ni
, Chungen Zhou^*

^*此作品的通讯作者

材料科学与工程学院

Beihang University

科研成果: 期刊稿件 › 文章 › 同行评审

24 引用（Scopus）

摘要

Impedance spectroscopy was employed to evaluation of TGO growth on the interface of YSZ/bond coat in plasma sprayed thermal barrier coatings during isothermal oxidation and exposed to Na ₂SO ₄ at 950 °C. Various observed electrical responses relating to the thickness, continuous nature and purity of the TGO layer were explained using an equivalent circuit model. The results show the thickness of TGO increases with exposure time. The TGO after isothermal oxidation mainly contains Al ₂O ₃. However, the TGO after hot corrosion changes gradually from Al ₂O ₃ to a mixture of NiO, Al ₂O ₃ and Ni(Cr, Al) ₂O ₄ spinel. The thickness of the continuous alumina layer formed in TBCs can be evaluated by electrical modulus spectra.

源语言	英语
页（从-至）	643-646
页数	4
期刊	Rare Metals
卷	30
期	SUPPL.1
DOI	https://doi.org/10.1007/s12598-011-0363-z
出版状态	已出版 - 3月 2011

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title = "Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy",

abstract = "Impedance spectroscopy was employed to evaluation of TGO growth on the interface of YSZ/bond coat in plasma sprayed thermal barrier coatings during isothermal oxidation and exposed to Na 2SO 4 at 950 °C. Various observed electrical responses relating to the thickness, continuous nature and purity of the TGO layer were explained using an equivalent circuit model. The results show the thickness of TGO increases with exposure time. The TGO after isothermal oxidation mainly contains Al 2O 3. However, the TGO after hot corrosion changes gradually from Al 2O 3 to a mixture of NiO, Al 2O 3 and Ni(Cr, Al) 2O 4 spinel. The thickness of the continuous alumina layer formed in TBCs can be evaluated by electrical modulus spectra.",

keywords = "Hot corrosion, Impedance spectroscopy, TBCs, Thermal oxidation",

author = "Hui Huang and Chao Liu and Liyong Ni and Chungen Zhou",

year = "2011",

month = mar,

doi = "10.1007/s12598-011-0363-z",

language = "英语",

volume = "30",

pages = "643--646",

journal = "Rare Metals",

issn = "1001-0521",

publisher = "John Wiley and Sons Inc",

number = "SUPPL.1",

}

TY - JOUR

T1 - Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy

AU - Huang, Hui

AU - Liu, Chao

AU - Ni, Liyong

AU - Zhou, Chungen

PY - 2011/3

Y1 - 2011/3

N2 - Impedance spectroscopy was employed to evaluation of TGO growth on the interface of YSZ/bond coat in plasma sprayed thermal barrier coatings during isothermal oxidation and exposed to Na 2SO 4 at 950 °C. Various observed electrical responses relating to the thickness, continuous nature and purity of the TGO layer were explained using an equivalent circuit model. The results show the thickness of TGO increases with exposure time. The TGO after isothermal oxidation mainly contains Al 2O 3. However, the TGO after hot corrosion changes gradually from Al 2O 3 to a mixture of NiO, Al 2O 3 and Ni(Cr, Al) 2O 4 spinel. The thickness of the continuous alumina layer formed in TBCs can be evaluated by electrical modulus spectra.

AB - Impedance spectroscopy was employed to evaluation of TGO growth on the interface of YSZ/bond coat in plasma sprayed thermal barrier coatings during isothermal oxidation and exposed to Na 2SO 4 at 950 °C. Various observed electrical responses relating to the thickness, continuous nature and purity of the TGO layer were explained using an equivalent circuit model. The results show the thickness of TGO increases with exposure time. The TGO after isothermal oxidation mainly contains Al 2O 3. However, the TGO after hot corrosion changes gradually from Al 2O 3 to a mixture of NiO, Al 2O 3 and Ni(Cr, Al) 2O 4 spinel. The thickness of the continuous alumina layer formed in TBCs can be evaluated by electrical modulus spectra.

KW - Hot corrosion

KW - Impedance spectroscopy

KW - TBCs

KW - Thermal oxidation

UR - https://www.scopus.com/pages/publications/84862931706

U2 - 10.1007/s12598-011-0363-z

DO - 10.1007/s12598-011-0363-z

M3 - 文章

AN - SCOPUS:84862931706

SN - 1001-0521

VL - 30

SP - 643

EP - 646

JO - Rare Metals

JF - Rare Metals

IS - SUPPL.1

ER -

Evaluation of TGO growth in thermal barrier coatings using impedance spectroscopy

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