PROJECT SUMMARY

The proposed research, aim to find a new approach to the preparation of amorphous Fe-based and Co-based soft magnetic powders and compacts eliminating, as much as possible, the main drawbacks of the classically prepared soft magnetic amorphous materials. The amorphous powders will be prepared by mechanical alloying. Their structural magnetic, electric, thermic characteristics will be investigated and correlated with preparation conditions.

Optimisation of the mechanosynthesis process by studies concerning the influence of milling conditions (wet or dry milling, speed ratio between vials and support disk, ball to powder ratio) on the powder amorphisation and their characteristics will be performed. The substitution of B and Si by different amount of Zr and/or Ti in the (Fe, Co, Ni)75 - (B, Si)25 systems will lead to a new system to be investigate: (Fe, Co, Ni)75 - (Zr, Ti)x - (B, Si)25-x. The influence of B and Si substitution by different amount of Zr and/or Ti on structure, microstructure, magnetic characteristics, and thermal stability of the alloys will be investigated. The Fe-based and Co-based powders characterised by highest saturation magnetisation, highest permeability, lowest coercivity, highest electrical resistivity and widen supercooled liquid region will be compacted by spark plasma sintering. This technique will allow us to prepare high density amorphous soft magnetic compacts conserving the magnetic characteristics of sintered amorphous powders.

TEAM STRUCTURE

NEAMTU BOGDAN VIOREL - Project manager
CHICINAS IONEL Senior - Researcher
MARINCA TRAIAN FLORIN - Postdoctoral researcher
POPA FLORIN - Postdoctoral researcher
CHICINAS HOREA FLORIN - Master student
RUS MARCEL - Technician