Role of raw material morphology on microstructures and magnetic properties of bulk SmCo/Fe(Co) nanocomposite magnets
Source abstract
Abstract
Abstract The role of the morphology of raw Fe materials on microstructures and magnetic properties of bulk SmCo/Fe(Co) nanocomposite magnets prepared by ball milling combined with annealing and high pressure thermal compression (HPTC) was investigated. We found that the branch-like coarse-grained Fe (BLCG-Fe) promoted SmCo amorphization and reduced grain sizes of the formed Fe(Co) nanocrystals during ball milling process compared with spherical nanocrystalline Fe (SN-Fe). The BLCG-Fe resulted in a three-phased nanocomposite consisting of SmCo7, SmCo3 and Fe(Co) phases and the SN-Fe led to a two-phased magnet composed of SmCo7 and Fe(Co) phases after annealing at 580 °C. And the BLCG-Fe nanocomposite had a smaller Fe(Co) grain size d = 12 nm compared with d = 18 nm for the SN-Fe nanocomposite. For the nanocomposites prepared by HPTC, the BLCG-Fe enhanced obviously the (0 0 2) texture of the SmCo7 phase and improved the magnetic anisotropy compared with the SN-Fe, which resulted in a much higher energy product 25.5 MGOe (203 kJ/m3) than that 15.5 MGOe (123 kJ/m3). The detailed mechanism was discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties of Alloys · Magnetic and transport properties of perovskites and related materials · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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