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Journal of Nanomaterials
Volume 2011 (2011), Article ID 934801, 6 pages
http://dx.doi.org/10.1155/2011/934801
Research Article

Combustion Synthesis of Large Bulk Nanostructured Ni65Al21Cr14 Alloy

1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received 11 January 2011; Accepted 17 February 2011

Academic Editor: Zhi Li Xiao

Copyright © 2011 Jiqiang Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A large bulk nanostructured Ni65Al21Cr14 alloy with dimensions of Φ 100 mm × 6 mm was produced by combustion synthesis technique followed with rapid solidification. The Ni65Al21Cr14 alloy was composed of γ-Ni3Al/γ-Ni(Al, Cr) eutectic matrix and γ-Ni(Al, Cr) dendrite. The eutectic matrix consisted of 80–150 nm cuboidal γ-Ni3Al and 2–5 nm γ-Ni(Al, Cr) boundary. The dentrite was comprised of high-density growth twins with about 3–20 nm in width. The nanostructured Ni65Al21Cr14 alloy exhibited simultaneously high fracture strength of 2200 MPa and good ductility of 26% in compression test.