Health & Environmental Research Online (HERO)


Print Feedback Export to File
1768660 
Journal Article 
The effect of particle size, sintering temperature and sintering time on the properties of Al-Al2O3 composites, made by powder metallurgy 
Rahimian, M; Ehsani, N; Parvin, N; Baharvandi, HR 
2009 
Yes 
Journal of Materials Processing Technology
ISSN: 0924-0136 
209 
14 
5387-5393 
WOS:000267837000002 
Al2O3 is a major reinforcement in aluminum-based composites, which have been developing rapidly in recent years. The aim of this paper is to investigate the effect of alumina particle size, sintering temperature and sintering time on the properties of Al-Al2O3 composite. The average particle size of alumina were 3, 12 and 48 mu m. Sintering temperature and time were in the range of 500-600 degrees C for 30-90 min. A correlation is established between the microstructure and mechanical properties. The investigated properties include density, hardness, microstructure, yield strength, compressive strength and elongation to fracture. It has been concluded that as the particle size of alumina is reduced, the density is increased followed by a fall in density. In addition, at low particle size, the hardness and yield strength and compressive strength and elongation to fracture were higher, compared to coarse particles size of alumina. The variations in properties of Al-Al2O3 composite are dependent on both sintering temperature and time. Prolonged sintering times had an adverse effect on the strength of the composite. (C) 2009 Published by Elsevier B.V. 
Aluminum-based composite; Alumina particle size; Sintering temperature; Sintering time; Powder metallurgy