Use of an “Open” Triple-Phase Boundary to Demonstrate Where Chromium Contaminants Initially Deposit at the LSM-YSZ Interface
Bibliographic record
Abstract
Through the design of a densified (La0.8Sr0.20.98MnO3 (LSM) embedded 8% YSZ ceramic wafer with a well defined, readily observable triplephase boundary (TPB), we have demonstrated that (Cr,Mn)3O4 spinel crystals grow preferentially on the YSZ side of the TPB during cathodic polarization of a half-cell at 800°C in the presence of a chromia-forming stainless steel electrical contact. In all examples studied, chromium species transfer to the TPB region is seen well before any observable degradation of the half-cell performance. Because solid Cr2O3 was not observed at or near the TPB, it is believed that the open design allows rapidly equilibration of deposited Cr2O3 with the gaseous Cr species, while the more stable spinel phases remain at the interface. The results presented here show that, if the TPB region is not blocked by solid species, little if any effects due to chromium poisoning are observed.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".