The Effect of Milling Time on Density and Microstructural Characterization of Si3n4/Gr Ceramic Powder
The IUP Journal of Mechanical Engineering, Vol. VIII, No. 1, February 2015, pp. 63-69
Posted: 9 Jul 2017
Date Written: September 25, 2015
Silicon nitride and graphite ceramic powders with a supposed composition of 50% of each by weight were mechanically alloyed in laboratory ball mill with different milling times (12.5, 25, 50, 75 and 100 hours). The investigation was carried out on the microstructure and density of ball-milled powder. It was observed that with milling time density increased initially and then started decreasing. The density was 2.83 at 0 hours and 2.81 g/cm3 at 100 hours. The results showed that ball milling is a very dominant method and a very dynamic process for preparation of combined powder with homogeneous microstructure having appropriate morphology and homogenized density.
Keywords: Scanning Electron Microscopy (SEM), Silicon Nitride (Si3N4), Graphite (Gr), Mechanical Alloying (MA), Hybrid Aluminum Matrix Composites (HAMCs)
Suggested Citation: Suggested Citation