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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".