In Situ fabrication of (Cu-Cr)-Al2O3 nanocomposite

Abstract

   (Cu-Cr)-Al₂O₃ nanocomposite with different contents of Al₂O₃ has been successfully produced by using mechanochemical routs. This approach involves mechanical milling of Cu, Al, CuO and Cr₂O₃ in a high energy ball mill to produce (Cu-Cr)-Al₂O₃ composite. Different amount of initial Cu contents has been used to control the adiabatic temperature, Al₂O₃ particles size and Al₂O₃ content in the final products. The results of micro structure analysis with scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies showed that in the early stage of ball milling particles agglomeration occurred and subsequently a solid solution of Cr in Cu, Cu (Cr), formed. In next step reaction between solute Al and CuO resulted in formation of fine Al₂O₃ particles and fracture of particles caused particles refinement.  The results of X-ray diffraction showed that Al₂O₃ particles were very fine

Keywords

• Nanocomposite
• (Cu-Cr)-Al2O3
• mechanochemical

20.1001.1.22285946.1389.1.1.6.0

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