Enhanced stability of rocksalt-type AIN phase in AIN/TiN superlattices synthesized by room-temperature pulsed laser deposition
Bibliographic record
Abstract
AlN/TiN superlattice coatings with bilayer thickness, Λ, of 1–20 nm were synthesized by pulsed laser deposition (PLD) at room temperature. Below a critical value of bilayer thickness, Λc≈3 nm, the coatings formed a single-phase NaCl-type structure due to pseudomorphic stabilization of the nonequilibrium rocksalt-type (B1) AlN phase. Exceeding Λc resulted in the loss of continuous coherent growth of alternating AlN and TiN layers that is usually attributed to a rocksalt→wurtzite AlN phase transformation occurring in AlN layers when their thickness exceeds a certain critical value. However, in contrast to previous reports, a substantial amount of crystalline B1–AlN has been detected within the volume of AlN layers in AlN/TiN superlattices with Λ>Λc. The observed enhanced pseudomorphic stability of B1–AlN in superlattices fabricated by room-temperature PLD is explained by kinetically limited conditions inherent to this deposition technique. The presence of the B1–AlN phase in AlN/TiN multilayers is assumed to be mainly responsible for their increased hardness in the range of Λ where the Koehler hardness enhancement mechanism is inoperative.
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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 | 0.000 | 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 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".