Process optimization of in situ magnetic-anisotropy spark plasma sintering of m-type-based barium hexaferrite bafe12o19

Abstract

This paper introduces a new spark plasma sintering technique that is able to order crystalline anisotropy by in-series/in situ DC electric coupled magnetic field. The process control parameters have been investigated on the production of anisotropic BaFe12O19 magnets based on re-sulted remanence (Mr). Sintering holding time (H.T.), cooling rate (C.R.), pressure (P), and sintering temperature (S.T.) are optimized by Taguchi with L9 orthogonal array (OA). The remanent magnet-ization of nanocrystalline BaFe12O19 in parallel (Mrǁ) and perpendicular (Mr⊥) to the applied magnetic field was regarded as a measure of performance. The Taguchi study calculated optimum process parameters, which signific..