Phase transformations study on Ni<inf>75</inf>Al<inf>25</inf> and Ni<inf>50</inf>Al<inf>50</inf> during mechanical alloying and sintering

Abstract:

In the present work we study the phase transformations taking place by mechanical alloying in the Ni-Al system and with further consolidation by sintering at high pressures with the aim of maintaining nanometric grain size. Different phase transformations were observed during milling, a Ni(Al) saturated solid solution for Ni-25 at.%Al and the formation of the intermetallic compound for Ni-50 at.%Al. Amorphization and recrystallization was also observed after prolonged milling. These phases remain after sintering with nanometric grain size and very high values of hardness. © 2006 Elsevier B.V. All rights reserved.

Año de publicación:

2007

Keywords:

• Nanostructure materials
• Mechanical alloying
• X-Ray diffraction
• Intermetallics

Fuente:

scopus

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