Characterization of Aluminum-Titanium Oxide-Nickel Oxide Hybrid Nanocomposite Prepared by Powder Metallurgy

摘要

The effect of variation milling time and compaction pressure on Al-TiO_2-NiO nanocomposite prepared by powder metallurgy was investigated. Aluminium (Al), titanium dioxide (TiO_2) and nickel oxide (NiO) powders were milled in a low energy ball mill using ball media in 10mm diameter at 15, 30,45, 60, 75, 90, and 105 hours, respectively. Then, the nanocomposite was compacted at 13.8, 27.6, 41.4, 55.2 MPa, respectively. These nanocomposites were characterized for its structural properties, morphology and densification using Panelli-Ambrizio Filho equation. No new phase was formed because the energy was not enough to initiate solid state reaction during milling but increasing milling produced crystallite size and internal strain in nanocomposite. The morphology of Al-TiO_2-NiO nanocomposite become homogenous with increasing milling time while Al crystallite size was reduced and internal strain was increased. The densification of Al-TiO_2-NiO nanocomposite was enhanced with increasing milling time and compaction pressure.