Effect of Sintering Time on Hardness and Wear Behaviours of Carbon Nanotubes Reinforced Aluminium Matrix Composites
M. Yıldırıma, D. Ozyurek a and M. Guru b
aKarabuk University, Technology Faculty, Manufacturing Eng., 78100 Karabuk, Turkey
bGazi University, Engineering Faculty, Department of Chemical Eng., 06500 Ankara, Turkey
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In this study, the effects of sintering time on hardness and wear behaviour were investigated of carbon nanotubes reinforced aluminium matrix composites. 1% multi wall carbon nanotubes (90% purity with 9.5 nm in diameter, 1.5 μm in length) and gas atomized 7075 Al alloy powders were mechanical milled for 120 min in a planetary ball mill. Mechanical milled aluminium composite powders were cold pressed under 520 MPa. Pre-shaped samples were sintered in atmosphere controlled furnace at 580°C for three different sintering times (1, 2, and 3 h). As a result of study, it was observed that the hardness values of composites were decreased with increasing sintering time and the weight loss was decreased. It was determined from worn surface SEM images that adhesive wear mechanisms were dominant.

DOI: 10.12693/APhysPolA.131.92
PACS numbers: 81.20.Ev