Effect of glucose concentrations on wear resistance of Al/APC composites prepared by hydrothermal carbonized deposition on chips

In this study, a novel method termed hydrothermal carbonized deposition on chips (HTCDC) is proposed to prepare aluminum alloy-amorphous carbon (Al/APC) composites. The influences of glucose concentration in hydrothermally reaction on the microstructure and wear resistance of the Al/APC composites were thoroughly studied. Amorphous carbon was deposited by HTCDC onto Al-20Si chips as a supporter. The Al/APC composites were prepared by hot extrusion from the chips. The results indicated that a uniform carbon film was successfully synthesized on the surface of the chips, improving the wear resistance of the Al/APC composites. With increasing concentration of glucose solution, the size and the number of delamination on the wear surface and the coefficient of friction decreased, and the wear rate decreased at first and then increased. In addition, the dehydration and carbonization processes in the hydrothermal reaction of glucose were analyzed. A schematic model of the wear surface of the Al/APC composites was established and the wear mechanisms were discussed. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.