توليد در جاي كامپوزيت نانو ساختار Cu-Al2O3 به روش مكانوشيميايي

In-situ Production of Cu-AI203 Nanocomposite by using Mechanochemical Route

Cu-Al]O] nanocomposite with different contents of A1203has been successfully produced by using mechanochemical routs. This approach involves mechanical milling ofCu. AI, CuO in a low energy ball mill to produce Cu-Al]03 composite. Different amount ofinitial Cu contents has been used to control the adiabatic temperature, Al203particles size and Al203 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 ofball milling particles agglomeration occurred and subsequently a solid solution of Al in Cu, Cu(Al), formed. In next step reaction between soluted Al and CuO resulted in formation offine A1203particles andfracture ofparticles caused particles refinement. The results ofxray diffraction showed that Al203 particles were very fine and Cu crystallines were smaller than 30 nm after 72 hours ball milling.