>
Fa   |   Ar   |   En
   investigation of in-situ synthesis of alumina reinforcement and comparative flexural behavior with respect to ex-situ al2o3 reinforced copper composite  
   
نویسنده khodabakhshzade fallah maoud ,ghesmati tabrizi saeid ,seyedi sheida
منبع journal of ultrafine grained and nanostructured materials - 2021 - دوره : 54 - شماره : 1 - صفحه:101 -111
چکیده    Ex-situ and in-situ reinforced copper matrix composite samples containing 1.1 wt. % and 2 wt. % al2o3 were produced by spark plasma sintering (sps) at 830 700 °c with and holding time of 30 20 min. in-situ reinforced sample was synthesized by a novel technique using the reaction between ball-milled copper oxide and cu-10 wt. % al filings as the additive materials to and copper powder. the in-situ formation of alumina reinforcement was confirmed by sem observation and eds analysis. morphology and distribution of reinforcement phase in different composite samples were studied. the flexural fracture strength (349 mpa) and strain (0.027) of in-situ reinforced composite were significantly enhanced in addition that it entered the plastic zone. the in-situ reinforced composite sample showed superior flexural fracture strength and strain (349 mpa and 0.027, respectively). the fracture surfaces investigation revealed the effect of clean in-situ interfaces. different patterns of crack propagation were observed in the sem images of fracture surfaces: the reinforcement’s interface path (due to the formation of undesired oxide phase) was dominant in the ex-situ samples, while the interface of in-situ reinforcements remained intact and the cracks originated in the agglomeration sites.
کلیدواژه in-situ al2o3 reinforcement ,copper matrix composite ,flexural strength ,fracture behavior
آدرس islamic azad university, mashhad branch, college of engineering, department of metallurgy & ceramics, iran, islamic azad university, mashhad branch, college of engineering, department of metallurgy & ceramics, iran, islamic azad university, mashhad branch, college of engineering, department of metallurgy & ceramics, iran
پست الکترونیکی sseyyedy@yahoo.com
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved