Effects of Nb microalloying on the magnetic properties and microstructure of Fe-Si-B-P-Cu-Nb nanocrystalline alloys prepared with pure and industrial raw materials
Source abstract
Abstract
Fe-based nanocrystalline alloys with high saturation magnetic flux density ( B s) and low coercivity ( H c) are highly desirable, especially if they can be prepared with industrial raw materials (IRMs). Here, Fe 82.3Si 4B 9P 4Cu 0.7 and Fe 82.3Si 4B 9P 3Cu 0.7Nb 1 nanocrystalline ribbons were prepared with IRMs and pure raw materials (PRMs). It was found that Nb microalloying broadens the annealing process window of the ribbons due to the suppressed precipitation of Fe(B, P) phase. In addition, the soft magnetic properties of the Fe 82.3Si 4B 9P 3Cu 0.7Nb 1 ribbons prepared with IRMs are insensitive to impurities and surface-crystallized layer. Compared to the PRMs-prepared ribbons, the IRMs increase the H c of the Nb-free ribbons, whereas having little effect on the H c of the Nb-doped ribbons with dendritic-crystallites in the surface layer. These results originate from the former forming coarse α-Fe grains and narrow magnetic domains, while the latter mainly forming fine α-Fe grains and broad magnetic domains. This work provides a valuable reference for the development and industrialization of nanocrystalline alloys with high B s and low H c.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Magnetic Properties and Applications · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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