Udhayabanu, V. ; Ravi, K. R. ; Murty, B. S. (2011) Development of in situ NiAl-Al2O3 nanocomposite by reactive milling and spark plasma sintering Journal of Alloys and Compounds, 509 . S223-S228. ISSN 0925-8388
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jallcom.2010.12.091
Abstract
NiAl-10 vol.% Al2O3 in situ nanocomposite has been synthesized by reactive milling and subsequent spark plasma sintering. The synthesized nanocomposites have ~96% of theoretical density after sintering at 1000 °C for 5 min. Microstructural analysis of consolidated samples using TEM has revealed the presence of α-Al2O3 particles of 10-12 nm size in NiAl matrix of submicron grain size. Consolidated NiAl-10 vol.% Al2O3 nanocomposite has shown very high hardness of 772 HV0.3 and compressive strength of 2456 MPa with ∼14% plastic strain. The high hardness and compressive yield strength are attributed to the presence of nanocrystalline α-Al2O3 particles and the appreciable plastic strain is attributed to the submicron grains of NiAl.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nanostructured Materials; Mechanical Alloying; Solid State Reaction; Transmission Electron Microscopy; Spark Plasma Sintering |
| ID Code: | 73902 |
| Deposited On: | 08 Dec 2011 03:57 |
| Last Modified: | 08 Dec 2011 03:57 |
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