Effect of Rotational Speeds and Mated Balls on the Vacuum Tribological Properties of a-C∶H film
Bibliographic record
Abstract
Amorphous hydrogenated carbon(a-C∶H) films have great application prospects as a space lubricant,the vacuum tribological properties of the film have related to the doping elements,frictional counterpart,sliding speed,etc.The a-C∶H and composite films with different dopants of Cr,MoS2 with a thickness of 1.3-1.5 μm were deposited on stainless(steel AISI202) and p(111) silicon substrates using a medium frequency unbalanced magnetron sputtering system.The vacuum tribological properties of a-C∶H film and films with different dopants(Cr,MoS2) were tested on a ball-on-disk tribometer.The effect of the mated balls and rotational speeds on the tribological properties of the amorphous carbon film were also investigated.The film with the best tribological properties was investigated with different counterparts(GCr15,Si3N4,and C) and rotational speeds(100,500,and 1000 r/min).The results show that the pure a-C∶H film exhibits the lowest friction coefficient(0.005) and the longest wear lifetime.The counterpart ball has little effect on the friction coefficient even though the wear life of the film decreased with increasing hardness of the counterpart ball.Meanwhile,the friction coefficient and wear life decreases with increasing rotating speed.
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How this classification was reachedexpand
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".