Abstract
The durability and reliability of thermal barrier coatings(TBCs) have become a major concern of hot-section components due to lack of a reliable life prediction model. In this paper, it is found that the failure location of TBCs is at the TBC/TGO interface by a sequence of crack propagation and coalescence process. The critical crack length of failure samples is 8.8mm. The crack propagation rate is 3-10m/cycle at the beginning and increases largely to 40m/cycle near coating failure. A life prediction model based a simple fracture mechanics approach is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 3161-3166 |
| Number of pages | 6 |
| Journal | International Journal of Modern Physics B |
| Volume | 24 |
| Issue number | 15-16 |
| DOIs | |
| State | Published - 30 Jun 2010 |
Keywords
- Thermal barrier coatings
- crack propagation
- life prediction
- plasma spraying
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