FIELD: process engineering.
SUBSTANCE: invention relates to producing nanocrystalline magnetic powder used to fabricate broadband radar absorbent materials. Proposed method comprises thermal pretreatment of selected initial material representing amorphous band from magnetically soft alloys based on Fe-Co-Ni-system at (0.25-0.29)-Tliquidus for 30-90 min with air cooling and pre-mincing thermally treated band to 3-5 mm fraction. Then, grinding is performed in high-speed disintegrator due to particles collision to obtain amorphous structure powder with faction size of 20-60 mcm. Final thermal treatment of obtained amorphous powder is conducted at (0.3-0.4)Tliquidus for 30-90 min with air cooling for producing nanostructure in powder volume and isolating nanocrystals in amorphous matrix.
EFFECT: production of nanocrystalline magnetic powder from high magnetic conductivity magnetically soft alloys.
1 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING NANOCRYSTALLINE POWDER | 2012 |
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| MULTI-LAYERED COMPOSITE MATERIAL FOR PROTECTION AGAINST ELECTROMAGNETIC RADIATION | 2012 |
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| COMPOSITE MATERIAL FOR ELECTROMAGNETIC RADIATION PROTECTION | 2006 |
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RU2324989C2 |
| COMPOSITE RADAR ABSORBENT MATERIAL | 2008 |
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