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1

Morphology and hardness of Nd-Fe-B magnetic materials in polymer matrix

Grujic A., Stajic-Trosic J., Talijan N., Stevanovic J., Aleksic R.

Archives of Materials Science

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2008

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Vol. 29, nr 1-2

29-32

EN

The effect of different polymer binders and effect of binder percentage on morphology and hardness of synthesized Nd-Fe-B bonded composites is studied and presented. The ratio of epoxy binder content regarding to the Nd-Fe-B powder is varied as follows - 22: 78; 50:50; 75:25; 10:90; for two different combinations of polymer binder. The goal of this preliminary investigation was to obtain good morphology characteristics and satisfactory hardness values.

2

Electrochemical deposition of powder of ternary Co-Ni-Mo alloy from alkaline electrolyte

Stajic-Trosic J., Grujic A., Stevanovic J., Jordovic B., Pesic O.

Archives of Materials Science

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2008

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Vol. 29, nr 1-2

73-76

EN

The Co-Ni-Mo alloy powders were electrochemically deposited from alkaline ammonical electrolyte containing two or three different elements, Co, Ni and/or Mo at a constant current density. The obtained Co-Ni-M powders were studied using EDS, XRay and SEM analysis. Based on the obtained experimental results it can be concluded that by appropriate selection of chemical composition of the electrolyte for deposition, varying of Co, Ni and Mo ions ratios and current density it can be influenced on the particle sizes of deposited powders. X-ray results suggest that the obtained powders have amorphous structure.

3

Thermomagnetic behavior and microstructure of a rapidly quenched Nd14Fe79B7 alloy

Cosovic V., Talijan N., Stajic-Trosic J., Grujic A., Zivkovic D., Zak T.

Archives of Materials Science

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2007

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Vol. 28, nr 1-4

20-24

EN

Changes in the phase composition and crystallite size, as well as changes in the magnetic behavior of overstoichiometric Nd14Fe79B7 alloy (32 mass% Nd), caused by the thermomagnetic measurements (TM), were observed in regard to the optimal magnetic state of this alloy. In the optimized magnetic state, the hard magnetic phase Nd2Fe14B is identified as the primary phase (up to 95 mass %), with a mean crystallite size about 60 nm, as determined by XRD analysis and Transmission electron microscopy (TEM). The derogation of magnetic properties after TM is due to decreased amount of Nd2Fe14B phase, the formation of Nd2O3 and different Fe(O)B phases, as well as an increase in the mean crystallite size (e.g. Nd2Fe14B . 95 nm).

4

Powders of binary and ternary of Co, Ni and Mo alloys obtained by electrolytic deposition

Stevanovic J., Cosovic V., Stajic-Trosic J., Jordovic B., Pesic O.

Archives of Materials Science

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2007

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Vol. 28, nr 1-4

155-159

EN

The Co-Ni and Co-Ni-Mo alloy powders were electrochemically deposited from alkaline ammonical electrolyte at a constant current density. Between them, Ni and Co are anomalously deposited, and both metals induce Mo deposition, which on its own cannot be deposited from aqueous solutions. Based on the obtained experimental results it can be concluded that by appropriate selection of chemical composition of the electrolyte for deposition, varying of Co, Ni and Mo ions ratios and current density it can be influenced on the particle sizes of deposited powders.