Evaluation of microstructural evolution of thermal barrier coatings exposed to Na2SO4 using impedance spectroscopy

Hui Huang; Chao Liu; Liyong Ni; Chungen Zhou

doi:10.1016/j.corsci.2010.12.023

Evaluation of microstructural evolution of thermal barrier coatings exposed to Na₂SO₄ using impedance spectroscopy

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

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

61 Scopus citations

Abstract

Impedance spectroscopy as a non-destructive evaluation technique was employed to study the microstructural evolution of thermal barrier coatings exposed to Na₂SO₄ at 950°C. The results showed that the resistance and capacitance of yttria-stabilized zirconia top coat increased with corrosion time. The resistance of thermally growth oxide (TGO) from 20 to 60h decreased slowly, which indicates there is little change in the composition of TGO. The fast decrease in the resistance of TGO from 60 to 100h may correspond to the compositional change of TGO from a-Al₂O₃ to more conductive NiO and Ni(Cr, Al)₂O₄ with corrosion time.

Original language	English
Pages (from-to)	1369-1374
Number of pages	6
Journal	Corrosion Science
Volume	53
Issue number	4
DOIs	https://doi.org/10.1016/j.corsci.2010.12.023
State	Published - 2011

Keywords

A. Ceeramic
A. Superalloys
B. EIS
C. Hot corrosion

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10.1016/j.corsci.2010.12.023

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title = "Evaluation of microstructural evolution of thermal barrier coatings exposed to Na2SO4 using impedance spectroscopy",

abstract = "Impedance spectroscopy as a non-destructive evaluation technique was employed to study the microstructural evolution of thermal barrier coatings exposed to Na2SO4 at 950°C. The results showed that the resistance and capacitance of yttria-stabilized zirconia top coat increased with corrosion time. The resistance of thermally growth oxide (TGO) from 20 to 60h decreased slowly, which indicates there is little change in the composition of TGO. The fast decrease in the resistance of TGO from 60 to 100h may correspond to the compositional change of TGO from a-Al2O3 to more conductive NiO and Ni(Cr, Al)2O4 with corrosion time.",

keywords = "A. Ceeramic, A. Superalloys, B. EIS, C. Hot corrosion",

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

year = "2011",

doi = "10.1016/j.corsci.2010.12.023",

language = "英语",

volume = "53",

pages = "1369--1374",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

number = "4",

}

TY - JOUR

T1 - Evaluation of microstructural evolution of thermal barrier coatings exposed to Na2SO4 using impedance spectroscopy

AU - Huang, Hui

AU - Liu, Chao

AU - Ni, Liyong

AU - Zhou, Chungen

PY - 2011

Y1 - 2011

N2 - Impedance spectroscopy as a non-destructive evaluation technique was employed to study the microstructural evolution of thermal barrier coatings exposed to Na2SO4 at 950°C. The results showed that the resistance and capacitance of yttria-stabilized zirconia top coat increased with corrosion time. The resistance of thermally growth oxide (TGO) from 20 to 60h decreased slowly, which indicates there is little change in the composition of TGO. The fast decrease in the resistance of TGO from 60 to 100h may correspond to the compositional change of TGO from a-Al2O3 to more conductive NiO and Ni(Cr, Al)2O4 with corrosion time.

AB - Impedance spectroscopy as a non-destructive evaluation technique was employed to study the microstructural evolution of thermal barrier coatings exposed to Na2SO4 at 950°C. The results showed that the resistance and capacitance of yttria-stabilized zirconia top coat increased with corrosion time. The resistance of thermally growth oxide (TGO) from 20 to 60h decreased slowly, which indicates there is little change in the composition of TGO. The fast decrease in the resistance of TGO from 60 to 100h may correspond to the compositional change of TGO from a-Al2O3 to more conductive NiO and Ni(Cr, Al)2O4 with corrosion time.

KW - A. Ceeramic

KW - A. Superalloys

KW - B. EIS

KW - C. Hot corrosion

UR - https://www.scopus.com/pages/publications/79951812427

U2 - 10.1016/j.corsci.2010.12.023

DO - 10.1016/j.corsci.2010.12.023

M3 - 文章

AN - SCOPUS:79951812427

SN - 0010-938X

VL - 53

SP - 1369

EP - 1374

JO - Corrosion Science

JF - Corrosion Science

IS - 4

ER -

Evaluation of microstructural evolution of thermal barrier coatings exposed to Na₂SO₄ using impedance spectroscopy

Abstract

Keywords

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