Effect of Al₂O₃ particles on the mechanical and wear properties of Al base composites

Abstract

In this study as its novelty, Al/Al2O3 composites have been fabricated combined stir casting and accumulative roll bonding (ARB) process. Then, the next step was the investigation of the effect of Nano Al2O3 Vol.% on mechanical, wear and microstructural properties of these kind of composites. After the 4th cycle, an excellent particle distribution through the aluminum matrix has been achieved. Then, mechanical properties, wear resistance and microstructural properties have been investigated. The results showed that by higher the alumina Vol.% contents, the strength of these composites were enhanced and the elongation of samples decreased. Also, by increasing alumina content into the Al matrix through stir casting process, a significant increase in wear resistance was achieved.

A Study on the Influence of Zr on the Strengthening of the Al-10% Al2O3 Composite Obtained by Mechanical Alloying

“…Traditional reinforcing phases in composites are ceramic particles, such as Al 2 O 3 , which are characterized by high hardness and melting temperatures [12]. Al-Al 2 O 3 composites are produced using various methods, including stir casting [13,14], gas pressure infiltration [15,16], ultrasonic casting [17,18], squeeze casting [19], semi-solid mechanical stirring [20], powder metallurgy [21] and mechanical alloying [22][23][24][25][26][27][28][29][30][31]. Mechanical alloying [32][33][34][35][36][37] is the most effective method for forming a homogeneous ultrafine structure.…”