Investigation of interfacial properties of atmospheric plasma sprayed thermal barrier coatings with four-point bending and computed tomography technique

Y. Zhao; A. Shinmi; X. Zhao; P. J. Withers; S. Van Boxel; N. Markocsan; P. Nylen; P. Xiao

doi:10.1016/j.surfcoat.2012.05.099

Investigation of interfacial properties of atmospheric plasma sprayed thermal barrier coatings with four-point bending and computed tomography technique

Y. Zhao, A. Shinmi, X. Zhao, P. J. Withers, S. Van Boxel, N. Markocsan, P. Nylen, P. Xiao

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

Abstract

A modified four-point bending test has been employed to investigate the interfacial toughness of atmospheric plasma sprayed (APS) yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) after isothermal heat treatments at 1150°C. The delamination of the TBCs occurred mainly within the TBC, several to tens of microns above the interface between the TBC and bond coat. X-ray diffraction analysis revealed that the TBC was mainly tetragonal in structure with a small amount of the monoclinic phase. The calculated energy release rate increased from ~50J/m -2 for as-sprayed TBCs to ~120J/m -2 for the TBCs exposed at 1150°C for 200h with a loading phase angle about 42°. This may be attributed to the sintering of the TBC. X-ray micro-tomography was used to track in 3D the evolution of the TBC microstructure non-destructively at a single location as a function of thermal exposure time. This revealed how various types of imperfections develop near the interface after exposure. The 3D interface was reconstructed and showed no significant change in the interfacial roughness after thermal exposure. © 2012 Elsevier B.V.

Original language	English
Pages (from-to)	4922-4929
Number of pages	7
Journal	Surface and Coatings Technology
Volume	206
Issue number	23
DOIs	https://doi.org/10.1016/j.surfcoat.2012.05.099
Publication status	Published - 15 Jul 2012

Keywords

Computed tomography
Four-point bending
Interfacial toughness
Plasma sprayed
Thermal barrier coatings

Access to Document

10.1016/j.surfcoat.2012.05.099

2 Finished

Structural Evolution across multiple time and length scales
Withers, P., Cartmell, S., Cernik, R., Derby, B., Eichhorn, S., Freemont, A., Hollis, C., Mummery, P., Sherratt, M., Thompson, G. & Watts, D.
1/06/11 → 31/05/16
Project: Research
High Efficiency Turbo Machinery
Xiao, P. & Bonello, P.
1/06/09 → 31/05/13
Project: Research

So You Think You Can Design A Jet Engine?! - A Toolkit For Communicating Materials Research
Philip Withers (Participant), Michael Preuss (Participant), Joao Quinta Da Fonseca (Participant), Ping Xiao (Participant) & Kevin Tan (Participant)
Impact: Society and culture, Technological

Cite this

@article{55b8526bb8394ec1947cf99764cd2dbc,

title = "Investigation of interfacial properties of atmospheric plasma sprayed thermal barrier coatings with four-point bending and computed tomography technique",

abstract = "A modified four-point bending test has been employed to investigate the interfacial toughness of atmospheric plasma sprayed (APS) yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) after isothermal heat treatments at 1150°C. The delamination of the TBCs occurred mainly within the TBC, several to tens of microns above the interface between the TBC and bond coat. X-ray diffraction analysis revealed that the TBC was mainly tetragonal in structure with a small amount of the monoclinic phase. The calculated energy release rate increased from ~50J/m -2 for as-sprayed TBCs to ~120J/m -2 for the TBCs exposed at 1150°C for 200h with a loading phase angle about 42°. This may be attributed to the sintering of the TBC. X-ray micro-tomography was used to track in 3D the evolution of the TBC microstructure non-destructively at a single location as a function of thermal exposure time. This revealed how various types of imperfections develop near the interface after exposure. The 3D interface was reconstructed and showed no significant change in the interfacial roughness after thermal exposure. {\textcopyright} 2012 Elsevier B.V.",

keywords = "Computed tomography, Four-point bending, Interfacial toughness, Plasma sprayed, Thermal barrier coatings",

author = "Y. Zhao and A. Shinmi and X. Zhao and Withers, {P. J.} and {Van Boxel}, S. and N. Markocsan and P. Nylen and P. Xiao",

year = "2012",

month = jul,

day = "15",

doi = "10.1016/j.surfcoat.2012.05.099",

language = "English",

volume = "206",

pages = "4922--4929",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier BV",

number = "23",

}

TY - JOUR

T1 - Investigation of interfacial properties of atmospheric plasma sprayed thermal barrier coatings with four-point bending and computed tomography technique

AU - Zhao, Y.

AU - Shinmi, A.

AU - Zhao, X.

AU - Withers, P. J.

AU - Van Boxel, S.

AU - Markocsan, N.

AU - Nylen, P.

AU - Xiao, P.

PY - 2012/7/15

Y1 - 2012/7/15

N2 - A modified four-point bending test has been employed to investigate the interfacial toughness of atmospheric plasma sprayed (APS) yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) after isothermal heat treatments at 1150°C. The delamination of the TBCs occurred mainly within the TBC, several to tens of microns above the interface between the TBC and bond coat. X-ray diffraction analysis revealed that the TBC was mainly tetragonal in structure with a small amount of the monoclinic phase. The calculated energy release rate increased from ~50J/m -2 for as-sprayed TBCs to ~120J/m -2 for the TBCs exposed at 1150°C for 200h with a loading phase angle about 42°. This may be attributed to the sintering of the TBC. X-ray micro-tomography was used to track in 3D the evolution of the TBC microstructure non-destructively at a single location as a function of thermal exposure time. This revealed how various types of imperfections develop near the interface after exposure. The 3D interface was reconstructed and showed no significant change in the interfacial roughness after thermal exposure. © 2012 Elsevier B.V.

AB - A modified four-point bending test has been employed to investigate the interfacial toughness of atmospheric plasma sprayed (APS) yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) after isothermal heat treatments at 1150°C. The delamination of the TBCs occurred mainly within the TBC, several to tens of microns above the interface between the TBC and bond coat. X-ray diffraction analysis revealed that the TBC was mainly tetragonal in structure with a small amount of the monoclinic phase. The calculated energy release rate increased from ~50J/m -2 for as-sprayed TBCs to ~120J/m -2 for the TBCs exposed at 1150°C for 200h with a loading phase angle about 42°. This may be attributed to the sintering of the TBC. X-ray micro-tomography was used to track in 3D the evolution of the TBC microstructure non-destructively at a single location as a function of thermal exposure time. This revealed how various types of imperfections develop near the interface after exposure. The 3D interface was reconstructed and showed no significant change in the interfacial roughness after thermal exposure. © 2012 Elsevier B.V.

KW - Computed tomography

KW - Four-point bending

KW - Interfacial toughness

KW - Plasma sprayed

KW - Thermal barrier coatings

U2 - 10.1016/j.surfcoat.2012.05.099

DO - 10.1016/j.surfcoat.2012.05.099

M3 - Article

VL - 206

SP - 4922

EP - 4929

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

IS - 23

ER -

Investigation of interfacial properties of atmospheric plasma sprayed thermal barrier coatings with four-point bending and computed tomography technique

Abstract

Keywords

Access to Document

Fingerprint

Projects

Structural Evolution across multiple time and length scales

High Efficiency Turbo Machinery

Impacts

So You Think You Can Design A Jet Engine?! - A Toolkit For Communicating Materials Research

Cite this