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Journal of Advanced Ceramics 2019, 8(3): 438-447 https://doi.org/10.1007/s40145-019-0327-3
Research Article | Open Access | Issue | Published: 03 August 2019

Detection of small delamination in mullite/Si/SiC model EBC system by pulse thermography

Show Author's Information Yutaro ARAIa,  Ryo INOUEb( )
Department of Materials Science and Technology, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, Japan
Department of Mechanical Engineering, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, Japan
Keywords:
environmental barrier coatings (EBCs), delamination, pulse thermography (PT), multi-layer, image processing
Cite this article:
ARAI Y, INOUE R. Detection of small delamination in mullite/Si/SiC model EBC system by pulse thermography. Journal of Advanced Ceramics, 2019, 8(3): 438-447. https://doi.org/10.1007/s40145-019-0327-3
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Abstract Full text About this article

The pulse thermography (PT) technique was applied to the detection of the delamination of a multi-layered coating system composed of mullite/Si onto a reaction-bonded SiC substrate. The potential evaluation was carried out in order to detect internal delamination in multi-layered material system. Moreover, the observation of the cross sections and 3D views obtained by X-ray computed tomography (CT) indicated that the delamination occurred at the interface between the top coat and the bond coat layers. The changes in the temperature distribution obtained by PT indicated the existence of a delamination area in the top coat layer of the mullite. In particular, the lower temperature region corresponded to the delamination area. The experimental results confirmed that the PT technique is effective with respect to the internal delamination of multi-layered coating system.


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Detection of small delamination in mullite/Si/SiC model EBC system by pulse thermography

Show Author's information Yutaro ARAIa, Ryo INOUEb( )
Department of Materials Science and Technology, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, Japan
Department of Mechanical Engineering, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, Japan

Abstract

The pulse thermography (PT) technique was applied to the detection of the delamination of a multi-layered coating system composed of mullite/Si onto a reaction-bonded SiC substrate. The potential evaluation was carried out in order to detect internal delamination in multi-layered material system. Moreover, the observation of the cross sections and 3D views obtained by X-ray computed tomography (CT) indicated that the delamination occurred at the interface between the top coat and the bond coat layers. The changes in the temperature distribution obtained by PT indicated the existence of a delamination area in the top coat layer of the mullite. In particular, the lower temperature region corresponded to the delamination area. The experimental results confirmed that the PT technique is effective with respect to the internal delamination of multi-layered coating system.

Keywords: environmental barrier coatings (EBCs), delamination, pulse thermography (PT), multi-layer, image processing

References(29)

[1]
KN Lee, DS Fox, JI Eldridge, et al. Upper temperature limit of environmental barrier coatings based on mullite and BSAS. J Am Ceram Soc 2003, 86: 1299-1306.
DOI Google Scholar
[2]
KN Lee, DS Fox, NP Bansal. Rare earth silicate environmental barrier coatings for SiC/SiC composites and Si3N4 ceramics. J Eur Ceram Soc 2005, 25: 1705-1715.
DOI Google Scholar
[3]
CV Cojocaru, SE Kruger, C Moreau, et al. Elastic modulus evolution and behavior of Si/mullite/BSAS-based environmental barrier coatings exposed to high temperature in water vapor environment. J Therm Spray Tech 2011, 20: 92-99.
DOI Google Scholar
[4]
CV Cojocaru, D Lévesque, C Moreau, et al. Performance of thermally sprayed Si/mullite/BSAS environmental barrier coatings exposed to thermal cycling in water vapor environment. Surf Coat Technol 2013, 216: 215-223.
DOI Google Scholar
[5]
BT Richards, HNG Wadley. Plasma spray deposition of tri-layer environmental barrier coatings. J Eur Ceram Soc 2014, 34: 3069-3083.
DOI Google Scholar
[6]
BT Richards, MR Begley, HNG Wadley. Mechanisms of ytterbium monosilicate/mullite/silicon coating failure during thermal cycling in water vapor. J Am Ceram Soc 2015, 98: 4066-4075.
DOI Google Scholar
[7]
BT Richards, S Sehr, F de Franqueville, et al. Fracture mechanisms of ytterbium monosilicate environmental barrier coatings during cyclic thermal exposure. Acta Mater 2016, 103: 448-460.
DOI Google Scholar
[8]
BT Richards, KA Young, F de Francqueville, et al. Response of ytterbium disilicate-silicon environmental barrier coatings to thermal cycling in water vapor. Acta Mater 2016, 106: 1-14.
DOI Google Scholar
[9]
H Schneider. Thermal properties of mullite. In: Mulitte. H Schneider, S Komarneni, Eds. Willey-VCH, 2005: 149-164.
DOI
[10]
Y Okada, Y Tokumaru. Precise determination of lattice parameter and thermal expansion coefficient of silicon between 300 and 1500 K. J Appl Phys 1984, 56: 314-320.
DOI Google Scholar
[11]
M Langen, T Hibiya, M Eguchi, et al. Measurement of the density and the thermal expansion coefficient of molten silicon using electromagnetic levitation. J Cryst Growth 1998, 186: 550-556.
DOI Google Scholar
[12]
KN Lee, RA Miller, NS Jacobson. New generation of plasma-sprayed mullite coatings on silicon carbide. J Am Ceram Soc 1995, 78: 705-710.
DOI Google Scholar
[13]
R Inoue, Y Arai, H Kakisawa. In situ observation and strain distribution measurements of atmospheric plasma-sprayed mullite and Si multilayered coatings on SiC substrates. J Mater Sci 2019, 54: 2824-2835.
DOI Google Scholar
[14]
Y Arai, Y Aoki, Y Kagawa. Effect of cristobalite formation on the delamination resistance of an oxide/Si/(SiC/SiC) environmental barrier coating system after cyclic high temperature thermal exposure. Scripta Mater 2017, 139: 58-62.
DOI Google Scholar
[15]
Y Arai, Y Kagawa. Change of microstructure in environmental barrier coating on Si-contained ceramic substrate after melting and solidification of Si bond coat layer. J Gas Turbine Soc Jpn 2018, 46: 57-61. (in Japanese)
Google Scholar
[16]
Y Arai, M Sato, Y Kagawa. Melting/solidification of Si bond coat layer in oxide/Si/RB-SiC environmental barrier coating system. Adv Eng Mater 2018, 20: 1800677.
DOI Google Scholar
[17]
I Spitsberg, J Steibel. Thermal and environmental barrier coatings for SiC/SiC CMCs in aircraft engine applications. Int J Appl Ceram Technol 2005, 1: 291-301.
DOI Google Scholar
[18]
RT Bhatt, SR Choi, LM Cosgriff, et al. Impact resistance of environmental barrier coated SiC/SiC composites. Mater Sci Eng 2008, 476: 8-19.
DOI Google Scholar
[19]
C Ramachandra, KN Lee, SN Tewari, et al. Spectroscopic nondestructive evaluation of environmental barrier coating failure on silicon-based ceramics. J Am Ceram Soc 2004, 87: 1117-1121.
DOI Google Scholar
[20]
RT Bhatt, SR Choi, LM Cosgriff, et al. Impact resistance of uncoated SiC/SiC composites. Mat Sci Eng A 2008, 476: 20-28.
DOI Google Scholar
[21]
J Kimmel, N Miriyala, J Price, et al. Evaluation of CFCC liners with EBC after field testing in a gas turbine. J Eur Ceram Soc 2002, 22: 2769-2775.
DOI Google Scholar
[22]
RG Munro. Material properties of a sintered α-SiC. J Phys Chem Ref Data 1997, 26: 1195-1203.
DOI Google Scholar
[23]
RB Montgomery. Viscosity and thermal conductivity of air and diffusivity of water vapor in air. J Meteor 1947, 4: 193-196.
DOI
[24]
D Maillet, A Houlbert, S Didierjean, et al. Non-destructive thermal evaluation of delaminations in a laminate: Part I—Identification by measurement of thermal contrast. Compos Sci Technol 1993, 47: 137-153.
DOI Google Scholar
[25]
D Maillet, A Houlbert, S Didierjean, et al. Non-destructive thermal evaluation of delaminations in a laminate: Part II—The experimental Laplace transforms method. Compos Sci Technol 1993, 47: 155-172.
DOI Google Scholar
[26]
YZ Sun, IS Wichman. On transient heat conduction in a one-dimensional composite slab. Int J Heat Mass Trans 2004, 47: 1555-1559.
DOI Google Scholar
[27]
B Hildmann, H Schneider. Heat capacity of mullite—New data and evidence for a high-temperature phase transformation. J Am Ceram Soc 2004, 87: 227-234.
DOI Google Scholar
[28]
PD Desai. Thermodynamic properties of iron and silicon. J Phys Chem Ref Data 1986, 15: 967-983.
DOI Google Scholar
[29]
F Cardarelli. Materials Handbook. Springer London, 2000.
DOI
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Publication history

Received: 20 January 2019
Revised: 28 February 2019
Accepted: 22 March 2019
Published: 03 August 2019
Issue date: September 2019

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© The author(s) 2019

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