Thermal stability of Al–Zr-Sc conductor alloys during long-term elevated-temperature exposures
Bibliographic record
Abstract
Four Al-Zr-Sc conductor alloys with 0.1–0.18 wt.% Zr and 0.1–0.15 wt.% Sc were processed through casting, hot rolling, heat treatments, and cold wire drawing. The mechanical properties and electrical conductivities of the alloy wires were evaluated, and the microstructures were characterized using scanning electron microscopy, transmission electron microscopy, and electron backscattering diffraction techniques. The thermal stabilities of these alloys were systematically assessed during thermal exposures at 310, 350, and 400 °C for up to 1000 h. The ultimate tensile strengths (UTSs) of four Al-Zr-Sc alloy wires reached 206–214 MPa, while the electrical conductivities were 57%–57.5% IACS. All four alloy wires were strengthened by a large number of Al 3 (Sc,Zr) nanoprecipitates. With the increase in Zr or Sc content, the UTS only slightly increased, which shows a low impact of the Zr and Sc levels on the tensile strength and electrical conductivity. Notably, remarkable reduction in tensile strength and change in the deformed grain structure were not observed for the four alloy wires during thermal exposure at 310 °C for up to 1000 h. After thermal exposure at 350 °C for 200 h, all four wires still exhibited excellent thermal stabilities. With prolonged exposures at 350 and 400 °C, the alloy wires became unstable. The high-Zr-content Al-0.18Zr-0.1Sc and Al-0.18Zr-0.15Sc alloys exhibited better thermal stabilities after long-term thermal exposures at 350 and 400 °C. This study on the thermal stability of Al-Zr-Sc conductor alloys under extreme conditions provides a valuable reference for industrial applications of thermally resistant Al conductor wires.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 | 0.001 |
| 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".