Structural Features of Near Equiatomic FeCo-2V Semi-hard Magnetic Alloy Prepared by MIM Technology

Authors

  • Borivoje Nedeljković Faculty of Technical Sciences, University of Kragujevac, Svetog Save 65, 32 000 Čačak, Serbia
  • Vladimir B. Pavlović University of Belgrade, Faculty of Agriculture, Nemanjina 6, 11000 Belgrade, Serbia
  • Nina Obradović Institute of Technical Sciences of SASA, Knez Mihailova 35, 11000 Belgrade, Serbia
  • Nebojša Mitrović Faculty of Technical Sciences, University of Kragujevac, Svetog Save 65, 32 000 Čačak, Serbia

Abstract

The structural properties of a magnetically semi-hard near equiatomic FeCo-2wt%V (FeCoV) alloy produced by Powder Injection Moulding (PIM) (option by fine metal powder - Metal Injection Moulding (MIM) technology) were investigated in this paper. Starting granulate was prepared by mixing FeCoV powder with a low-viscosity binder. After injection, the green samples were first treated with a solvent and then thermally with the same aim of removing the binder. MIM technology was completed by high-temperature sintering for 3.5 hours at temperatures from 1370 to 1460 oC in a hydrogen atmosphere, which provides the necessary magnetic and mechanical characteristics. The influence of sintering temperature was investigated concerning the aspects of the processes of structural transformation by the methods of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The appearance of an intense diffraction peak of the α'-FeCo phase (crystal structure type B2) was registered for all investigated samples. Structural parameters particle size Dmax, Feret X, and Feret Y exhibit constant increase with increase of sintering temperature.

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Published

2024-08-12

Issue

Vol. 56 No. 4 (2024)

Section

Articles