The fretting corrosion resistance of PVD surface-modified orthopedic implant alloys
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
The objective of this study was to evaluate the fretting corrosion resistance of both modified and unmodified Ti6Al4V flats fretted against CoCr-alloy spheres in a buffered Hank's solution at 37 degrees C using an original fretting apparatus. A physical vapor deposition (PVD) cathodic arc evaporation technique was used to deposit 3-4 microm thick titanium nitride (TiN), zirconium nitride (ZrN), or amorphous carbon (AC) coatings onto the Ti6Al4V substrates. The fretting behavior of the nitride films (TiN and ZrN) was characterized by the absence of surface damage and the deposition of a Cr-rich oxide transferred from the CoCr-alloy spheres to the modified surfaces. This oxide led to a slight increase in surface roughness. Three of the six multilayered AC coatings tested exhibited extensive fretting damage and generated large, deep, wear scars. Cohesive failure of the AC coating was observed in the low contact stress areas of the fretting scars. The remaining AC-coated specimens experienced only slight polishing wear. The reason for the different behavior within the AC-coated specimens is not clear at the present time. The unmodified Ti6Al4V surfaces experienced severe surface damage consistent with the adhesive galling mechanism to which these alloys are susceptible.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.008 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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