J. Phys. IV France 08 (1998) Pr2-135-Pr2-138
Role of aluminium in structural and magnetic properties of nanocrystalline alloy FeSiBNbCuJ. Moya1, 2, M.J. García2, M. Vázquez2 and H. Sirkin1
1 Lab. de Sólidos Amorfos, FIUBA, Paseo Colón 850, Buenos Aires 1063, Argentina
2 Instituto de Magnetismo Aplicado, UCM-RENFE, and Instituto de Ciencia de Materiales, CSIC, Apartado de Correos 155, Las Rozas, 28230 Madrid, Spain
The influence of partial substitution of Fe. Si and B elements by Al (up to 9%) is analyzed for a nanocrystalline FeSiBNbCu alloy. Structural studies show that the increment of Al deteriorates the glass forming ability of the material. Coercivity in amorphous as-quenched samples becomes lower as the Al content increases in two alloy series : while after nanocrystallization values as small as about 0.5 A/m are obtained. DSC thermograms show that addition of Al advances the nucleation of the crystalline phase. Also, a particular evolution is noticed when Si is replaced by Al : the exothermic peak characteristic of α(Fe,Si) phase begins to split into two peaks while increasing the Al content.
© EDP Sciences 1998