Effect of Aluminum addition on Ferro-Silica-Magnesium powder against hardness and corrosion rate with Mechanical Alloying methods
Anggara B. S (a),, Mutia Delina (a)., Lucita (a)

(a) Department of Physics, Faculty Mathematics and Natural Science, State University of Jakarta, Jakarta 13220

Abstract

Has been made of Fe-Si-Mg powder alloy coated aluminum (Al) as an adhesive with variations in composition (0; 2.2; 6.0; 10.2) wt% forming Fe-Si-Mg-Al. Mixing powder is done by using mechanical alloying technique, namely wet mixing with ball milling use shaker-mill for 2 hours. After drying the sample is printed using a compression device with an 8-ton pressure for 3 minutes. Subsequent samples were given heat treatment or sintering in the tabular furnace at 10000C temperature detention for 2 hours, with a heating-rate of 50C/min and cooling-rate naturally up to room temperature. An XRD test was conducted to determine the phase formed and the SEM-EDX test to determine the morphological structure as well as the pattern of alloy composition spread. The results show the increasing content of Al hardness tends to decrease, while the increased content of Al corrosion-rate is increasing. This is due to the occurrence of oxidation of Fe binding oxygen forming Fe2O3, Si binding of oxygen forming SiO2 and Al binding of oxygen into Al2O3.

Keywords: Mechanical alloying, Fe-Si-Mg-Al, corrosion-rate.

Topic: Material Science