Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings

Y. Z. Liu; X. B. Hu; Y. L. Zhu; H. Wei; Vinayak P. Dravid; W. W. Zhang

doi:10.1016/j.ceramint.2019.01.208

Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings

Y. Z. Liu^*, X. B. Hu, Y. L. Zhu, H. Wei, Vinayak P. Dravid, W. W. Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article

2 Scopus citations

Abstract

An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.

Original language	English (US)
Pages (from-to)	8815-8823
Number of pages	9
Journal	Ceramics International
Volume	45
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2019.01.208
State	Published - May 2019

Keywords

Isothermal oxidation
Mechanical properties
Microstructural evolution
Thermal barrier coatings (TBCs)
Transmission electron microscopy (TEM)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2019.01.208

Fingerprint Dive into the research topics of 'Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings'. Together they form a unique fingerprint.

Cite this

Liu, Y. Z., Hu, X. B., Zhu, Y. L., Wei, H., Dravid, V. P., & Zhang, W. W. (2019). Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings. Ceramics International, 45(7), 8815-8823. https://doi.org/10.1016/j.ceramint.2019.01.208

@article{f502112d2ad24deb806bff9c499059fc,

title = "Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings",

abstract = "An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.",

keywords = "Isothermal oxidation, Mechanical properties, Microstructural evolution, Thermal barrier coatings (TBCs), Transmission electron microscopy (TEM)",

author = "Liu, {Y. Z.} and Hu, {X. B.} and Zhu, {Y. L.} and H. Wei and Dravid, {Vinayak P.} and Zhang, {W. W.}",

year = "2019",

month = may,

doi = "10.1016/j.ceramint.2019.01.208",

language = "English (US)",

volume = "45",

pages = "8815--8823",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Limited",

number = "7",

}

TY - JOUR

T1 - Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings

AU - Liu, Y. Z.

AU - Hu, X. B.

AU - Zhu, Y. L.

AU - Wei, H.

AU - Dravid, Vinayak P.

AU - Zhang, W. W.

PY - 2019/5

Y1 - 2019/5

N2 - An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.

AB - An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.

KW - Isothermal oxidation

KW - Mechanical properties

KW - Microstructural evolution

KW - Thermal barrier coatings (TBCs)

KW - Transmission electron microscopy (TEM)

UR - http://www.scopus.com/inward/record.url?scp=85060759914&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060759914&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2019.01.208

DO - 10.1016/j.ceramint.2019.01.208

M3 - Article

AN - SCOPUS:85060759914

VL - 45

SP - 8815

EP - 8823

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 7

ER -