Abstract

In this study, aluminium-aluminium oxide (Al-Al2O3) metal matrix composites of different weight percentage reinforcements of aluminium oxide were processed at different sintering temperatures. In order to prepare these composite specimens, conventional powder metallurgy (PM) method was used. Three types specimens of different compositions such as 95%Al+5%Al2O3, 90%Al+10%Al2O3 and 85%Al+15%Al2O3 were prepared under 20 Ton compaction load. Then, all the specimens were sintered in a furnace at two different temperatures 550oC and 580oC. In each sintering process, two different heating cycles were used. After the sintering process, it was observed that undistorted flat specimens were successfully prepared for all the compositions. The effects of sintering temperature and weight fraction of aluminium oxide particulates on the density, hardness and microstructure of Al-Al2O3 composites were observed. It was found that density and hardness of the composite specimens were significantly influenced by sintering temperature and percentage aluminium oxide reinforcement. Furthermore, optical microscopy revealed that almost uniform distribution of aluminium oxide reinforcement within the aluminium matrix was achieved.

Highlights

  • In recent years, particle reinforced metal matrix composites (MMCs) are gaining popularity for advanced applications

  • It is very clear that the density of the composite increases with the increased Al2O3 particulate weight fraction, After the sintering process, the density of the composites increases 1.6, 1.19 and 1.96% due to the content of aluminium oxide particulate weight fraction 5, 10 and 15% respectively

  • It was observed that density of composite specimen increases with the increase in Al2O3 weight percentage in Al-Al2O3 composite

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Summary

INTRODUCTION

Particle reinforced metal matrix composites (MMCs) are gaining popularity for advanced applications. Effect of Sintering Temperature on the Properties of Aluminium-Aluminium Oxide Composite Materials. Effect of Sintering Temperature on the Properties of Aluminium-Aluminium Oxide Composite Materials greatly influenced by the reinforced zinc oxide. The influence of different weight fractions of silicon carbide particulate reinforcement on the properties of aluminium based metal matrix composites were investigated [11]. The obtained results revealed that hardness and impact strength of the composites were significantly influenced by the weight fraction of silicon carbide. The effects of sintering temperature and weight fraction of aluminium oxide particulates on the properties of Al-Al2O3 composites were investigated. The properties such as hardness, density and microstructure of the composites were analyzed

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