Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 22, No. 2 (August 2009) 169-178   

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  STRUCTURAL EVOLUTION OF AL-20% (WT) AL<SUB>2</SUB>O<SUB>3</SUB> SYSTEM DURING BALL MILLING STAGES
 
 
S.S. Razavi Tousi, R. Yazdani Rad*, E. Salahi
M.R. Rahimipour, A. Kazemzade and M. Razavi

Materials and Energy Research Center
P.O. Box 31787-316, Karaj, Iran
s-razavitoosi@merc.ac.ir - ryazdani5@yahoo.com - e-salahi@merc.ac.ir
m-rahimi@merc.ac.ir - a-kazemzadeh@merc.ac.ir - m-razavi@merc.ac.ir

* Corresponding Author
 
 
( Received: April 21, 2008 – Accepted in Revised Form: September 25, 2008 )
 
 

Abstract    Production of nanostructured aluminum matrix composite powder by high energy ball milling is investigated. Scanning electron microscopy analysis as well as the tap and green density measurements were used to optimize the milling time needed for the completion of the mechanical milling process. Also, we studied the particles morphology and size distribution change with milling time and its correlation with pressability and tap density. SEM showed that distribution of alumina particles in the Al matrix reaches a full homogeneity after the steady state. This would increase the hardness of powder due to a nano-structured matrix and oxide dispersion strengthening.

 

Keywords    Metal-Matrix Composites, Nano-Structured Materials, Steady State

 

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