Effects of Mechanical Alloying on Microstructure and Properties of Powder Injection Moulded SiCp-Reinforced Aluminium Composite

Tapany Patcharawit; Suthin Klahan; Patcharee Rupkrathok; Nutthita Chuankrerkkul

doi:10.4028/www.scientific.net/AMM.597.103

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 597Effects of Mechanical Alloying on Microstructure...

Effects of Mechanical Alloying on Microstructure and Properties of Powder Injection Moulded SiC_p-Reinforced Aluminium Composite

Abstract:

This research investigated effects of mechanical alloying on microstructure and hardness of 30 vol.% SiC_p - reinforced aluminium composites produced by powder injection moulding. Mechanical alloying was performed via an attrition mill prior to feedstock preparation at 52% and 55% solid loadings. Powder injection molding was operated at 170 ^oC followed by debinding and sintering at 680-740 ^oC. Experimental results showed that mechanical alloying aided better mixing of aluminium powder and SiC_p such that certain amounts of SiC_p was observed to be engulfed into deformable aluminium powder matrix. This in turn increased the interfaces between the two phases, thus facilitating sintering of the composite. By employing mechanical alloying, the effective sintering temperature has significantly reduced from 740 ^oC down to 700 ^oC. Improved sintered density and hardness were obtained by increasing % solid loading and sintering temperature.

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Periodical:

Applied Mechanics and Materials (Volume 597)

Pages:

103-108

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.597.103

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Online since:

July 2014

Authors:

Tapany Patcharawit*, Suthin Klahan, Patcharee Rupkrathok, Nutthita Chuankrerkkul

Keywords:

Aluminum (Al), Composite, Hardness, Injection, Mechanical-Alloying, Microstructure, Powder

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