Hardness, Density and Porosity of Al/(SiCw+Al₂O₃p) Composite by Powder Metallurgy Process without and with Sintering

Abstract:

Al/(SiCw+Al₂O₃p) composite was a blend of fine aluminum powder serving as a matrix while Silicon Carbid whiskers (SiCw) and Alumina (Al₂O₃p) as a reinforcement. Powder metallurgy was used for the manufacture of composites according to the shape of the test specimen. Parameter testing was conducted with varied sintering holding time of 1 h, 3 h and 6 h at a sintering temperature of 500°C and 600°C. This study was conducted to know hardness properties, density, porosity and SEM analysis. The results show that the sintering process which has been conducted affects the physical and mechanical properties of the composite. Increased hardness and density occur due to the stronger or more dense interface bonding between matrix and reinforcement which are affected by the increase in the holding time and sintering temprature, where the highest is at 6 hours with 600°C, while the porosity decreases inversely proportional to the density and the hardness that occur in composite materials.

• Periodical: Applied Mechanics and Materials (Volume 776)
• Pages: 246-252
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.776.246
• Online since: July 2015
• Authors: Ketut Suarsana*, Rudy Soenoko
• Keywords: Al/(SiCw+Al₂O₃p) Composite, Density, Hardness, Porosity

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