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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Crystallization behavior of amorphous Al84Y9Ni5Co2 alloy

2001; Elsevier BV; Volume: 304-306; Linguagem: Inglês

10.1016/s0921-5093(00)01532-x

ISSN

1873-4936

Autores

Nabil Bassim, Cláudio Shyinti Kiminami, M.J. Kaufman, Marcelo Falção de Oliveira, M.N.R.V. Perdigão, Walter José Botta Filho,

Tópico(s)

Material Dynamics and Properties

Resumo

Abstract The crystallization behavior and microstructure development upon annealing amorphous Al84Y9Ni5Co2 melt-spun ribbons have been investigated by a combination of differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Crystallization is shown to occur in three stages: (1) primary crystallization of α-Al; (2) formation of an unknown crystalline phase; (3) formation of Al3Y, Al9Co2 and a phase similar to Al16Ni3Y. The morphology, EDS and diffraction patterns indicated that the two unknown phases, from the second and third stages, are different phases and both are quaternary compounds.

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