TRIALS TO FABRICATE BY MECHANOSYNTHESIS A Cu_XAl_Y – BASED COMPOSITE REINFORCED WITH Al₂O₃ PARTICLES

The study describes the attempts to use a mechanochemical synthesis in the fabrication of composites based on Cu-Al intermetallic compounds reinforced with homogeneously distributed ceramic Al₂O₃ phase. For this purpose, a high-energy ball mill was used to obtain the reaction of malachite reduction Cu₂(OH)₂CO₃ with powdered aluminium Al⁰. The aim was to produce, besides the (Al₂O₃) ceramic phase, intermetallic Cu_xAl_y phases. Thus obtained materials were subjected to examinations by X-ray diffraction technique (XRD) and scanning electron microscopy (SEM). It has been proved that it is possible to fabricate a composite based on the intermetallic Cu₉Al₄ compound reinforced with Al₂O_3, as a result of numerous chemical reactions induced by various stimuli of strictly mechanical nature

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