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Fe AND Co ALLOYED NiAl POWDERS FOR SENSORS APPLICATION

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Lucaci M, Pintea J, Tsakiris V, Orban RL

Editorial: Metalurgia International, 14, p.115-118 , 2009.

Rezumat:

The paper presents our research results regarding the obtaining of alloyed NiAl powders. Starting from elemental powders, four compositions of the alloyed NiAl powders have been synthesized via self propagation high temperature synthesis followed by mechanical milling (SHS + MM). The alloying elements Fe and Co powders have been selected as alloying elements for substitute Ni powder. The amount of the substitute elements were 5 and 10 wt% for each alloying element. The obtained materials were characterized from the phase formation, microstructural aspects and magnetic properties point of view. The X-ray analysis showed that the synthesized materials contain only a single alloyed NiAl phase and the alloying elements are totally included in the NiAl crystalline lattice. The magnetic behavior of materials includes these materials in the soft magnetic material group. Both saturation magnetization and saturation induction of NiAl with 10 wt% Fe show the best values. Their magnetic properties recommend these materials for sensor applications.

Cuvinte cheie: pulberi de NiAl aliate, materiale feromagnetice, difractie de raze X, proprietati magnetice // Alloyed NiAl powders; ferromagnetic materials; X-ray analysis; Magnetic properties