J.M.  Alalkawi Hussain, Magda  Khalil Ahmed, Aseel A.  Alhamdany, 
    Comparison Between Mechanical Properties, Microstructures and Electrical
Conductivity of AA2024 Doped with Various Amount of
Alumina and Zirconium Oxide,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 19,
    2019,
    Pages 7028-7035,
    ISSN 1816-949x,
    jeasci.2019.7028.7035,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.7028.7035)
    Abstract: Preparing two aluminium matrix nanocomposites using stir casting method results in many desirable
benefits. The currents research is focused on fabricating AA2024-Al<sub>2</sub>O<sub>3</sub> and AA2024-ZrO at (2, 3 and 4 wt.%) 
Al<sub>2</sub>O<sub>3</sub> and ZrO. The casting temperature and stirring speed were 850&deg;C and 1000 rpm for 1.5 min stirring time. 
A microstructural study was carried out using optical microscopy and scan electric microscopy SEM, the effect
of two types of reinforcements on microstructural feature was discussed. It has been observed that the
reinforcement particles of the two nanomaterials Al<sub>2</sub>O<sub>3</sub> and ZrO uniformly distributed in AA2024 matrix 
composites. But the Al<sub>2</sub>O<sub>3</sub> composites had better distribution than the ZrO composites. The experimental results 
showed that the mechanical properties such as Brinell hardness, UTS and yield stress increases with the
addition of the nanomaterial content. But the ductility for both composites reduced when the nanomaterial
content increased taking almost linear trend. Also, the electrical conductivity for both composites was slightly
improved with increase of nano content.
    Keywords: conductivity;composites;mechanical properties;microstructure;two types nano reinforcement;Aluminium alloy 2024