| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1501300 | Scripta Materialia | 2008 | 4 Pages |
Abstract
Physical vapor deposited thermal barrier coatings (TBCs) were thermally cycled to near-failure at 1150 °C. Normal failure occurred after 200–300 1 h cycles with only moderate weight gains (0.5 mg cm−2). Delamination and buckling was often delayed until well after cooldown (desktop spallation), but could be instantly induced by the application of water drops, as shown in an accompanying video-recording. Moisture therefore plays a primary role in delayed desktop TBC failure. Hydrogen embrittlement is proposed as the underlying mechanism.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
James L. Smialek, Dongming Zhu, Michael D. Cuy,