| DOI | Resolve DOI: https://doi.org/10.1016/j.ceramint.2019.09.258 |
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| Author | Search for: Xiao, Bingjie; Search for: Robertson, Taylor1; Search for: Huang, Xiao; Search for: Kearsey, Rick1 |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Format | Text, Article |
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| Subject | thermal barrier coating; crack numerical density; fracture; gamma statistics |
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| Abstract | This study examined the application of crack numerical density theory (CND) to determine the damage state of a thermal barrier coating (TBC) produced using the suspension plasma spray (SPS) technique. A TBC consisting of a partially stabilized zirconia topcoat was deposited upon an APS NiCoCrAl bondcoat and INCONEL 625 substrate. The TBC was exposed to an isothermal temperature of 1080 °C for a duration of up to 1300 h with specimens removed for examination at, 400 h, 800 h and 1300 h. Material properties after each exposure were determined and utilized to fit a CND model to predict the crack distribution within the topcoat following isothermal exposure. Probabilities of cracks developing within the topcoat that can bridge asperities (0.01% at 400 h, 2% at 800 h, and 11% at 1300 h) were determined indicating that CND may be a useful tool for predicting lifetimes of SPS-TBCs. |
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| Publication date | 2019-09-27 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 28df6ba1-fb3c-4b85-84df-71207c229158 |
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| Record created | 2020-07-08 |
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| Record modified | 2021-09-17 |
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