Advanced Materials Research QiR 12 by Bondan Tiara Sofyan

By Bondan Tiara Sofyan

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The stirring was required to eliminate the gas bubble from the particles surface to receive an uniform metal oxide coating. To promote deposition metal oxide layer, SiC coated was dried at 2000C for 1 hour and continuously dried at 4000C for 2 hours. All SiC particles coated were characterised by XRD, SEM and EDS as well TEM. 2, were melted in melting furnace at 680 - 700oC. The melt was kept at the preset temperature for approximately 2 hours for homogenisation of temperature and composition. A controlled argon atmosphere was maintained inside the furnace throughout the experiment to prevent melt oxidation.

It is clear seen that metal oxide layer or spinel was not smooth and homogeneous. 3-123nm for different of Mg content. 2wt% Mg content formed more homogenoues and thicker of metal oxide layer on the SiC surface, therefore this condition was used to coat SiC particles for making Al-Si/SiC composites by stir casting route. 5wt%Mg (e) Microstructure of Al-Si/SiC MMCs Optical micrograph of Al-Si/SiC reinforced composites was shown in Fig. 6. 6c (M:200x). The porosity was formed in the cluster of SiC and increased with higher volume fraction of SiC.

The solute ability of Mg and Cu content in aluminium matrix affects a solid solution strengthening mechanism; therefore, increased hardness and strength occurs, as depicted in Fig. 6. 4 % wire fraction volume before and after rolling. 32 Advanced Materials Research QiR 12 Regarding composite material, the volume fraction of the reinforced material affects its physical and mechanical properties. The relationship between the volume fraction of reinforcement and the mechanical properties is stated as the Rule of Mixture (ROM), which demonstrates that increasing the volume fraction of the reinforced material improves the mechanical properties of the composite.

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