Creep Behaviour of Plasma Sprayed Thermal Barrier Coatings
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Engineers have always been concerned about the creep/sintering properties of thermal barrier materials, especially thermally sprayed zirconia coatings, which in the past few years have received exceptional attention. Under service conditions, the surface of these coatings is under compressive stress as a result of the high surface temperatures and steep thermal gradient. Stress relaxation occurs through mechanisms such as creep and sintering. Upon cooling, a new stress distribution develops, which may introduce cracks and reduce service life. In this work coatings from two different zirconia feedstocks (nanostructured and hollow sphere particles, HOSPTM) with 6–8 W t% Y2O3, as stabilizer, were prepared by air plasma spraying. By altering the process parameters of spraying, different amounts of porosity and non-melted particles were incorporated into the deposits. The creep strain and creep rate of these coatings were measured in four point flexure under a range of load and temperature levels. Results show that in spite of having almost the same rate of creep in the secondary stage (equal stress exponents, n), the total creep strain of coatings produced from nanostructured feedstock is lower than the coatings produced by the hollow sphere feedstock.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it