Characterization of the Corrosion Behavior of Hot Pressed Nanocomposites Al-SiC Powder
The object of the present work is the characterization of the corrosion behavior of Al-5%SiC nanocomposites prepared by mechanical alloying and the hot pressing method. Al/SiC metal matrix composite (MMCp) powder with volume fraction of 5% SiC was synthesized by high-energy milling of the blended micro component powder. The mechanically mixed nanocomposite powder was consolidated into bulk compacts using hot pressing at 1 GPa pressure for thirty seconds at three different temperatures of 440, 480 and 520°C. The microstructure was investigated by Secondary electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The corrosion behavior of the coating was evaluated using electrochemical techniques such as potansiodynamic polarization and EIS. It was found that the corrosion resistance of Al-5%SiC nanocomposite when hot pressed at 480°C, in 3.5% NaCl solution was higher than pure Al and Al-SiC nanocomposite that had been hot pressed at other temperatures.
M. S. J. Hashmi, B. S. Yilbas and S. Naher
T. Rostamzadeh et al., "Characterization of the Corrosion Behavior of Hot Pressed Nanocomposites Al-SiC Powder", Advanced Materials Research, Vols. 83-86, pp. 429-438, 2010