Abstract
A sintered Fe-Si alloy with Fe-Ta system particles was fabricated by a synthetic route of sintering via evaporation of an Fe-Si matrix and diffusion of Ta by sintering in high vacuum at high temperature. The Fe-Ta system particles precipitated on the surface and in grain boundaries of the matrix after sintering. The precipitated particles along grain boundaries in particular could contribute to improving mechanical strength by preventing intergranular fracture. The almost full densification observed after sintering and the disordered A2 phase of the matrix could also contribute to improving the strength. The sintered Fe-Si alloy with a controlled Si ratio and precipitation had low magnetic coercivity, low magnetic loss, high magnetic permeability, and high saturation magnetization, but it also maintained high mechanical strength. The fabricated Fe-Si alloy with precipitation showed much better magnetic and mechanical properties than those of conventional sintered alloys and even Si steel sheet (35H300).
Published Version
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