Effects of tungsten carbide and cobalt particles on corrosion and wear behaviour of copper matrix composite
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Bibliographic record
Abstract
Copper matrix composites reinforced with various contents (10–20 wt-%) and sizes (1–9 μm) of tungsten carbide particles (WCp) and cobalt particles (Cop, 1·5 μm and 5 wt-%) were fabricated by hot pressing. The effects of WCp and Cop on the wear and corrosion properties of the copper composites were evaluated. Dry wear testing was conducted in ambient conditions and wear corrosion testing was carried out in 3·5 wt-%NaCl solution (pH 6·7). The results show that the hardness, wear resistance and static corrosion weight loss of Cu/WCp composites increase with a decrease of WCp size or with an increase of WCp content. Also, the corrosion current density I corr increases with a decrease of WCp size or with an increase of WCp content, and the corrosion potential E corr exhibits no specific trend with varying WCp content and size. The wear corrosion rate increases with an increase in WCp content, yet shows no direct correlation with WCp size. On the other hand, Cu/WCp/Cop composites exhibit better wear resistance in both dry wear and corrosive wear conditions. The Cu/WCp/Cop composites show a much lower E corr and significantly more passivity than Cu/WCp composites in polarisation tests. The Cu/WCp/Cop composites exhibit excellent wear corrosion resistance, especially in the passive potential (Ep) state.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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 | 0.000 |
| 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