Abstract
A nano/amorphous dual-phase FINEMET microwire was fabricated directly from molten alloy without any interstage annealing by a home-built melt extraction technique (MET). The microstructure, mechanical and pronounced electromagnetic interference shielding (EMI) effectiveness of this dual-phase microwire has been systematically evaluated. The structural analysis reveals that the as-cast FINEMET microwire consists of two distinct structures, i.e., amorphous and nanocrystalline phase due to their different cooling characteristics. Compared with other reported FINEMET alloys, the extracted microwire exhibits a superior high tensile strength of 1800 MPa. These nanocrystals enabled dual-phase microwires also exhibit large EMI SE values in the frequency range of 8-12 GHz (X-band) due to the multiple magnetic loss mechanisms associated with their intrinsic structural characteristics. The combination of excellent mechanical properties and electromagnetic properties make this kind of melt-extracted dual-phase FINEMET microwire promising for a range of structure and multifunctional applications.
| Original language | English |
|---|---|
| Pages (from-to) | 1483-1490 |
| Number of pages | 8 |
| Journal | Materials Science and Engineering: B |
| Volume | 178 |
| Issue number | 20 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
Keywords
- Amorphous microwire
- EMI shielding
- Melt extraction
- Rapid solidification
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