Abstract
In this study the characterization of FeCo-2V alloys toroidal samples produced by PIM/MIM technology was presented. The feedstock for metal injection molding (MIM) was prepared by mixing starting FeCoV powder with a low viscosity binder. Green samples were subjected to solvent debinding and subsequent thermal debinding followed by sintering. Sintering was performed during 3.5 hours from 1370?C to 1460?C in hydrogen atmosphere in order to attain the appropriate mechanical and magnetic properties. Microstructure, hardness HV10 and magnetic hysteresis B(H) were investigated as a function of sintering temperature. Optimum combination of functional properties was observed after sintering at temperature of 1370?C. In addition, magnetic properties were analyzed as frequency dependent and successfully simulated in operating frequency range from 5 Hz to 60 Hz.
Highlights
Powder injection moulding is technology that can offer very efficient manufacturing of ceramic or metallic parts with complex geometries [1,2,3,4]
Sintering was performed during 3.5 hours from 1370 oC to 1460 oC in hydrogen atmosphere in order to attain the appropriate mechanical and magnetic properties
metal injection molding (MIM) as well as direct laser metal sintering (DLMS) process are today very useful technologies for commercial production plenty of magnetic elements
Summary
Powder injection moulding (acronym PIM) is technology that can offer very efficient manufacturing of ceramic or metallic parts with complex geometries [1,2,3,4]. Materials that contain metal elements were produced by variation of PIM technology named metal injection molding (MIM). Due to combinations of powders mixture, binders, molding techniques, debinding parameters and sintering temperature/time profiles, PIM technology is more suitable for magnetic materials industry as it enables easier production of complex cores compared to the classical routes [79]. Silva et all [8] investigated equiatomic Fe50Co50 alloy produced by PIM without V addition and concluded that the elimination of vanadium can improve magnetic properties (an increase in relative magnetic permeability at f=0.05 Hz) and contribute to substantial decrease in sintering temperature (980 oC instead of common sintering temperature of 1330 oC). Ferromagnetic parts for high temperature applications can be costeffectively produced as FeCoV alloys by PIM/MIM route
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