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1 Prace Naukowe. Chemia i Ochrona Środowiska / Akademia im. Jana Długosza w Częstochowie

1 2005

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Changes of properties of Co66Ni12Si9B13 metallic glass in process devitryfication

Jakubczyk E., Jakubczyk M., Kapuśniak J.

Prace Naukowe. Chemia i Ochrona Środowiska / Akademia im. Jana Długosza w Częstochowie

2005

Vol. 10

149--156

Isochronal annealing during 4h at different temperatures (573 ÷ 823 K) of samples of Co66Ni12Si9B13 metallic glass leads to the creation in the amorphous matrix three crystalline phases, i.e. at the temperature 673K phases α -(Co,Ni) and at the temperature 773K phase (Co,Ni)3B and (Co,Ni)2B. The result of the applied thermal treatment of the samples was their complete crystallization. The process of the annealing of the alloy leads to the systematic decrease of the electrical resistivity, Hall resistivity and the spontaneous Hall coefficient, and the creation of the crystalline phase is related to abrupt value decrease of these parameters. The calculations by quantum chemistry method confirm sequence and verify the composition of the created phases. The growth of gram sice of formed phases were observed by the optical microscope.