PRODUCTION AND CHARACTERIZATION OF MICRO AND NANO Al sub(2)O sub(3) PARTICLE-REINFORCED LM25 ALUMINIUM ALLOY COMPOSITES

LM25 aluminum alloy metal matrix composites (MMCs) reinforced with weight fractions of micro and nano Al sub(2)O sub(3) particles up to 10 wt. % were produced by stir casting. The composites thus produced were characterized for their mechanical properties such as hardness and tensile strength as wel...

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Bibliographic Details
Published in:ARPN journal of engineering and applied sciences 2011-06, Vol.6 (6), p.94-98
Main Authors: Suresh, S M, Mishra, Debadutta, Srinivasan, A, Arunachalam, R M, Sasikumar, R
Format: Article
Language:English
Subjects:
Aluminum base alloys
Aluminum oxide
Dispersions
Hardness
Metal matrix composites
Nanostructure
Particulate composites
Tensile strength
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Summary:LM25 aluminum alloy metal matrix composites (MMCs) reinforced with weight fractions of micro and nano Al sub(2)O sub(3) particles up to 10 wt. % were produced by stir casting. The composites thus produced were characterized for their mechanical properties such as hardness and tensile strength as well as for the dispersion of the micro and nano Al sub(2)O sub(3) particles. The results reveal that stir casting could be an economical route for the production of nano composites. Nano particle reinforced MMCs exhibit better hardness and strength when compared to micro particles reinforced composites. Scanning electron microscopic observations of the microstructures revealed that the dispersion of the micron size particles where more uniform while nano particles led to agglomeration of the particles.
ISSN:1819-6608
1819-6608