Ultrasonic properties of Ni–Fe–B4C cermets produced by tube furnace sintering
Bibliographic record
Abstract
B4C–Fe–based cermets with various Ni concentrations were produced by tube furnace sintering using the powder metallurgy method. The prepared cermets were sintered at 1000 °C under the argon shroud. Ultrasonic properties such as ultrasonic wave velocities, ultrasonic longitudinal and shear attenuation values, Young's (elastic) modulus, and Poisson’s ratio were determined by the pulse-echo method using 2 MHz and 4 MHz probes. The obtained ultrasonic properties were used to characterize the properties of the samples. It was observed that ultrasonic wave velocities and Young's modulus decreased with increasing Ni concentration. At the same time, ultrasonic attenuation values and Poisson ratio increased with increasing Ni concentration. According to the results, the amount of Ni has an effective role in the structure of the cermets.
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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 | 0.001 |
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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 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".