In Situ Fabrication of (Cu-Cr)-AlO Nanocomposite

(Cu-Cr)-AlO nanocomposite with different contents of AlO has been successfully produced by using mechanochemical routs. This approach involves mechanical milling of Cu, Al, CuO and CrO in a high energy ball mill to produce (Cu-Cr)-AlO composite. Different amount of initial Cu contents has been used to control the adiabatic temperature, AlO particles size and AlO 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 AlO particles and fracture of particles caused particles refinement. The results of X-ray diffraction showed that AlO particles were very fine.