Synthesis, microstructure and magnetic properties of low Nd content Fe90Nd5B3.5M1.5 (M = Hf, Ti and Ta) alloys
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Bibliographic record
Abstract
We have investigated the effects of Hf, Ti and Ta addition on crystallization behavior, microstructure and magnetic properties of melt-spun Fe90Nd5B3.5M1.5 (M = Hf, Ti and Ta) alloy ribbons. Optimization of processing conditions lead to the development of nano-composite magnets, made from high Bs soft magnetic bcc α-Fe (grain size ∼20 nm) and tetragonal Nd2Fe14B (grain size ∼18 nm) hard magnetic phases. Hf is most effective in restraining the growth of α-Fe and Nd2Fe14B phases during annealing. The Fe90Nd5B3.5Hf1.5 ribbon annealed at 1003 K for 600 s exhibits very high maximum energy product (BH)max ∼127 kJ/m3 and reduced remanence ∼1.34 T. Strong exchange coupling among the nano-sized soft and hard magnetic phases is shown to be responsible for the excellent magnetic properties. Among low Nd-containing NdFeB nano-composite magnets, the present alloy seems to have highest (BH)max.
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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 it