Theoretical study of new superhard materials: B4C3
Bibliographic record
Abstract
The structural, energetic, mechanical, and elastic properties of B4C3 polymorphs have been predicted from first-principles calculations. Results that indicate α-B4C3, β-B4C3, and pseudocubic B4C3 can be stable at ambient conditions, and their hardness is comparable to that of cubic BN. In particular, an extension of the Hall-Petch relation is established for the study of the hardness of nanocrystalline B4C3. It is predicted that the hardness of nanocrystalline β-B4C3 can approach that of diamond. The calculated energetic shows that the α- and β-B4C3 phases could potentially be prepared under high pressure and are promising superhard materials. The calculated band structure of β-B4C3 indicates that it may be transparent.
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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 | 0.002 | 0.000 |
| 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 | 0.000 |
| 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".