Experimental and numerical life prediction of thermally cycled thermal barrier coatings
(2004) In Journal of Thermal Spray Technology 13(3). p.415-424- Abstract
- This article addresses the predominant degradation modes and life prediction of a plasma-sprayed thermal barrier coating (TBC). The studied TBC system consists of an air-plasm a-sprayed bond coat and an air-plasma-sprayed, yttria partially stabilized zirconia top layer on a conventional Hastelloy X substrate. Thermal shock tests of air-sprayed TBC and pre-oxidized TBC specimens were conducted under different burner flame conditions at Volvo Aero Corporation (Trollhiittan, Sweden). Finite element models were used to simulate the thermal shock tests. Transient temperature distributions and thermal mismatch stresses in different layers of the coatings during thermal cycling were calculated. The roughness of the interface between the ceramic... (More)
- This article addresses the predominant degradation modes and life prediction of a plasma-sprayed thermal barrier coating (TBC). The studied TBC system consists of an air-plasm a-sprayed bond coat and an air-plasma-sprayed, yttria partially stabilized zirconia top layer on a conventional Hastelloy X substrate. Thermal shock tests of air-sprayed TBC and pre-oxidized TBC specimens were conducted under different burner flame conditions at Volvo Aero Corporation (Trollhiittan, Sweden). Finite element models were used to simulate the thermal shock tests. Transient temperature distributions and thermal mismatch stresses in different layers of the coatings during thermal cycling were calculated. The roughness of the interface between the ceramic top coat and the bond coat was modeled through an ideally sinusoidal wavy surface. Bond coat oxidation was simulated through adding an aluminum oxide layer between the ceramic top coat and the bond coat. The calculated stresses indicated that interfacial delamination cracks, initiated in the ceramic top coat at the peak of the asperity of the interface, together with surface cracking, are the main reasons for coating failure. A phenomenological life prediction model for the coating was proposed. This model is accurate within a factor of (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/267030
- author
- Liu, Yan LU ; Persson, Christer LU and Wigren, J
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- thermal shock tests, stress relaxation, prediction model, life, in-plane stress range, bond coat oxidation, finite element method
- in
- Journal of Thermal Spray Technology
- volume
- 13
- issue
- 3
- pages
- 415 - 424
- publisher
- Springer
- external identifiers
-
- wos:000223928200010
- scopus:4844229797
- ISSN
- 1544-1016
- DOI
- 10.1361/10599630420399
- language
- English
- LU publication?
- yes
- id
- 21f4f769-1ac5-4ef3-b283-cf53a35f3fc0 (old id 267030)
- date added to LUP
- 2016-04-01 12:20:13
- date last changed
- 2022-01-27 02:12:53
@article{21f4f769-1ac5-4ef3-b283-cf53a35f3fc0, abstract = {{This article addresses the predominant degradation modes and life prediction of a plasma-sprayed thermal barrier coating (TBC). The studied TBC system consists of an air-plasm a-sprayed bond coat and an air-plasma-sprayed, yttria partially stabilized zirconia top layer on a conventional Hastelloy X substrate. Thermal shock tests of air-sprayed TBC and pre-oxidized TBC specimens were conducted under different burner flame conditions at Volvo Aero Corporation (Trollhiittan, Sweden). Finite element models were used to simulate the thermal shock tests. Transient temperature distributions and thermal mismatch stresses in different layers of the coatings during thermal cycling were calculated. The roughness of the interface between the ceramic top coat and the bond coat was modeled through an ideally sinusoidal wavy surface. Bond coat oxidation was simulated through adding an aluminum oxide layer between the ceramic top coat and the bond coat. The calculated stresses indicated that interfacial delamination cracks, initiated in the ceramic top coat at the peak of the asperity of the interface, together with surface cracking, are the main reasons for coating failure. A phenomenological life prediction model for the coating was proposed. This model is accurate within a factor of}}, author = {{Liu, Yan and Persson, Christer and Wigren, J}}, issn = {{1544-1016}}, keywords = {{thermal shock tests; stress relaxation; prediction model; life; in-plane stress range; bond coat oxidation; finite element method}}, language = {{eng}}, number = {{3}}, pages = {{415--424}}, publisher = {{Springer}}, series = {{Journal of Thermal Spray Technology}}, title = {{Experimental and numerical life prediction of thermally cycled thermal barrier coatings}}, url = {{http://dx.doi.org/10.1361/10599630420399}}, doi = {{10.1361/10599630420399}}, volume = {{13}}, year = {{2004}}, }