Study of soft magnetic iron cobalt based alloys processed by powder injection molding

• DOI: 10.1016/j.jmmm.2008.02.178
• Publication Date: 2008-03-07T19:47:04Z
• Authors: Aline Silva; Jaime A. Lozano; Ricardo Machado; Jairo A. Escobar; Paulo A.P. Wendha...
• Keywords: Metal injection molding; Bobbin; Molding (decorative); Magnetic alloy

Abstract As a near net shape process, powder injection molding (PIM) opens new possibilities to process Fe–Co alloys for magnetic applications. Due to the fact that PIM does not involve plastic deformation of the material during processing, we envisioned the possibility of eliminating vanadium (V), which is generally added to Fe–Co alloys to improve the ductility in order to enable its further shaping by conventional processes such as forging and cold rolling. In our investigation we have found out two main futures related to the elimination of V, which lead to a cost–benefit gain in manufacturing small magnetic components where high-saturation induction is needed at low frequencies. Firstly, the elimination of V enables the achievement of much better magnetic properties when alloys are processed by PIM. Secondly, a lower sintering temperature can be used when the alloy is processed starting with elemental Fe and Co powders without the addition of V.