Texture and microstructural development in gelcast barium hexaferrite
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The development of texture in barium hexaferrite by templated grain growth was studied as a function of the Fe2O3/BaCO3 ratio, B2O3 additions in the starting materials, and sintering temperature. A magnetic field was used to orient the template particles during the gelcasting process. Excess BaCO3 resulted in abnormal grain growth and maximized texture, while B2O3 additions promoted coarsening, but no abnormal grain growth.
KeywordsB2O3 BaCO3 Orientation Image Microscopy Barium Hexaferrite Texture Direction
This work was supported by the National Science Foundation under Grant Nos. DMR-9800257 and DMR-0520513. A portion of the electron microscopy was conducted in the SHaRE User Facility at the Oak Ridge National Laboratory, which is sponsored by the Division of Scientific User Facilities, Office of Science, U.S. Department of Energy.
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