Thermally induced ordering process of stoichiometric nanocrystalline Ni₃Al intermetallic

Authors: Ismail, R.¹; Yaacob, I. I.²

Source: Materials Research Innovations, Volume 13, Number 3, September 2009 , pp. 179-181(3)

Buy & download fulltext article:

Price: $48.00 plus tax (Refund Policy)

Abstract:

Moderate to severe deformations were introduced by mechanical alloying of Ni and Al powders under argon gas atmosphere for different milling duration (4–24 h) to form stoichiometric nickel aluminide (Ni₃Al) powder. The Ni₃Al powders were consolidated into bulk compacts and sintered in a small differential thermal analysis furnace under flowing argon at 660�C for 4 h holding time. Characterisation by transmission electron microscopy revealed that the microstructure was retained at nanoscale dimension with presence of shear bands. Lattice parameter decreased significantly as milling time was increased to 18 h. Long range order parameter in ordering process showed partial ordering in the single phase nickel aluminide after sintering due to relaxation of internal stress.

Keywords: INTERMETALLICS; MECHANICAL ALLOYING; REACTIVE SINTERING; ORDERING TRANSFORMATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/143307509X437554

Affiliations: 1: Center of Nanotechnology, Precision and Advanced Materials, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia 2: Center of Nanotechnology, Precision and Advanced Materials, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;, Email: iskandar@um.edu.my

Publication date: 2009-09-01

More about this publication?

This journal features top 10 articles which are freely available. Please click here and click on the 'Top articles' link in the right-hand menu to view the list and start downloading.
Editorial Board
Information for Authors
Subscribe to this Title
Terms & Conditions
Top 10 Articles
ingentaconnect is not responsible for the content or availability of external websites