>
Fa   |   Ar   |   En
   Effect of Mechanical Milling on the Morphology and Structural Evaluation of Al-Al_2o_3 Nanocomposite Powders  
   
نویسنده Fathy A. ,Wagih A. ,Abd El-Hamid M. ,Hassan A.A.
منبع International Journal Of Engineering - 2014 - دوره : 27 - شماره : 4 - صفحه:625 -632
چکیده    The morphological and microstructural changes during mechanical milling of al powder mixed with 2.5, 5 and 10 wt.% al2o3 particles were studied. the milling was performed in a planetary ball mill for various times up to 20h. the produced composite powders were investigated using x-ray diffraction pattern (xrd) to elucidate the role of particle size, secondary phase content and milling time on grain size and lattice strain of al matrix. the aluminum crystallite size estimated with broadening of xrd peaks by williamson-hall formula. the morphological changes were studied by sem technique. the results show that the addition of hard al2o 3 particles accelerates the milling process, leading to faster work hardening rate and fracture of the aluminum matrix. furthermore, al becomes smaller crystallite size during ball milling of al powder in the presence of al2o3 particles. the results revealed that the grain size of milled powders was about 45nm with a noticeable presence of agglomerates. uniform distribution of nano-sized al2o3 particles in the al matrix could be achieved with increasing milling time.
کلیدواژه Mechanical Milling; Morphology; Particle Size; Al-Al_2o_3 Nanocomposite Powders
آدرس Department Of Mechanical Design And Production Engineering, Faculty Of Engineering, Egypt, Department Of Mechanical Design And Production Engineering, Faculty Of Engineering, Egypt, Department Of Mechanical Design And Production Engineering, Faculty Of Engineering, Egypt, Nuclear Research Center, Egypt
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved