Improvement and Optimization of the Hardness for the Aluminum Metal Matrix Composite Using Eggshell

This research examines the effect of size and weight fraction of the eggshell particles added on the hardening of the Al metal reinforced by eggshell Particles using the program MINITAB 16. Powder technology method has been used to produce a composite material, The composite material was obtained by adding different weight fractions (0,2, 6,10 and 12 wt. %) and the size (100,240,350,510and 670um) of eggshell particles to aluminum powder. It samples was composed by using pressing of single action then accompanied directly by process of sintering at 474°C under the inert gas effect conditions. it was concluded that the best hardening of (72.6971 Mpa) can be obtained when the variables were (Xi = 12 wt%) and (X2 =100um). The lights value of Xi and X2, obtained using the programs, was used in practice giving hardening (74Mpa) which it nearly similar to that obtained by program. Also results show that the variables weight fraction (X1) & Particle Size (X2) have a significant effect on hardening. Moreover, the hardening increases with increasing weight fraction. While hardening value decreases gradient with down eggshell particle size.