Role of ogyxen and nitrogen in mechanical alloying mechanism of Ni-Ti powder mixtures

Neves, Filipe; Fernandes, F. M. Braz; Martins, Isabel M.; Correia, J.B.

http://hdl.handle.net/10400.9/1639

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Authors

Neves, Filipe

Fernandes, F. M. Braz

Martins, Isabel M.

Correia, J.B.

Abstract(s)

In this study, the critical milling behaviour of Ni-Ti powder mixtures was evaluated in relation to the effect of atmospheric gases, more specifically to oxygen and nitrogen. Within the experimental conditions used, it is shown that both gases play an important role in the alloying process and that not only oxygen gas reacts with the mechanically alloyed powders but also nitrogen. The most effective mixing occurred for the mixtures with the highest contaminant contents.

Keywords

NiTi Mechanical alloying Critical milling behaviour Powder processing Shape memory alloys

URI

http://hdl.handle.net/10400.9/1639

Citation

Neves, F.; Fernandes, F.M. Braz; Martins, I.; Correia, J. Brito. Role of ogyxen and nitrogen in mechanical alloying mechanism of Ni-Ti powder mixtures. In: Powder Metallurgy, 2012, vol.55, nº4, p.268-272