The porosity (dark) level is high since in use strength is not a priority. The original granule size (about 30 micrometre diameter) is easily visualised since extensive intergranular porosity is present.
barium, barium hexaferrite, carbon, ceramic, ferrite, granule, hard magnet, iron, oxygen, doitpoms, university of cambridge, micrograph, corematerials, ukoer, Engineering, H000
Publisher: University of Sheffield
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