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

• Author(s): Neves, Filipe ; Fernandes, F. M. Braz ; Martins, Isabel M. ; Correia, J. Brito
• Date: 2012
• Persistent ID: http://hdl.handle.net/10400.9/1639
• Origin: Repositório do LNEG
• Subject(s): NiTi; Mechanical alloying; Critical milling behaviour; Powder processing; Shape memory alloys
• Document Type: Article
• Language: English

Description

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.