Wear behaviour of nanostructured and conventional 8 wt-%Y<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub> coatings against Si<sub>3</sub>N<sub>4</sub> ball
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Bibliographic record
Abstract
The aim of the present paper is to investigate and compare the wear and tribological behaviour of two types of yttria–partially stabilised zirconia coatings, i.e.nanostructured and conventional zirconia. The coatings, 8 wt-%Y 2 O 3 –ZrO 2 , were produced using an air plasma spraying (APS) technique. Substrates used were made from AISI 304 stainless steel. To perform the wear tests, a pin on disc wear testing machine, using a 10 mm silicon nitride (Si 3 N 4 ) ball as the pin, was employed. Coatings produced were characterised before and after being subjected to wear testing, using optical microscopy, scanning electron microscopy, energy dispersive X-ray spectrometry and X-ray diffraction. Regarding the wear tests, effects of various parameters, such as wear distance, substrate temperature, disc rotating speed (sliding velocity) and applied normal load, were investigated. Results obtained (weight loss, wear rate, coefficient of friction and worn surface microstructure) revealed that under the wear conditions applied, the nanostructured zirconia coating exhibited a better wear resistance and tribological properties than the conventional one. Also it was observed that the difference in wear resistance between both coatings tested is a function of wear testing parameters such as wear distance, substrate temperature, disc rotating speed and applied normal load.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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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