Fabrication of Al/SiC Nanocomposite Powders via In Situ Powder Metallurgy Method

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In the present investigation, the in-situ powder metallurgy (IPM) method was utilized to synthesis aluminum alloy matrix composite powders containing SiC nanoparticles. Specified amounts of SiC particles (with a size in the range of 250-600 µm) together with SiC nanoparticles (average size of 60 nm) were preheated and added to aluminum melt. This mixture was stirred via an impeller at a certain temperature for a predetermined time. The kinetic energy of the impeller was transferred to the melt via the non-wetting SiC particles and resulted in melt disintegration. The liquid droplets created by this process were then solidified upon cooling the blend resulting in a mixture of Al powders and SiC particles. This blend was passed through a 250 µm sized sieve and a mixture of Al powders and SiC nanoparticles was produced which could be subsequently used as a feedstock for preparation of Al-SiC nano-composites via the standard powder metallurgy methods. The results confirmed that the surface condition (oxidized vs. as-received), amount and different proportions of the added nano-sized and micron sized SiC particles as well as the chemistry of the metallic charge (CP aluminum or Al-1wt.%Mg) affect the size distribution and yield of the resultant sub-250 µm sized powders. The scanning electron microscopy (SEM) studies revealed that Al/SiC composite powders containing nano-sized SiC particles could be produced by using Al-1 wt.% Mg as the matrix alloy.

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Periodical:

Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu

Pages:

1347-1352

Citation:

M. Moazami Goudarzi and F. Akhlaghi, "Fabrication of Al/SiC Nanocomposite Powders via In Situ Powder Metallurgy Method", Advanced Materials Research, Vols. 295-297, pp. 1347-1352, 2011

Online since:

July 2011

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$38.00

[1] T.W. Clyne and P.J. Withers, An Introduction to Metal Matrix Composites, Cambridge University Press, UK (1993).

[2] Y.C. Kang, S.L.I. Chan, Tensile properties of nanometric Al2O3 particulate-reinforced aluminum matrix composites, Mater. Chem. Phys. 85 (2004) 438-443.

DOI: https://doi.org/10.1016/j.matchemphys.2004.02.002

[3] M. Sherif El-Eskandarany, Mechanical solid state mixing for synthesizing of SiCp/Al nanocomposites, J. Alloys Compd. 279 (1998) 263-271.

DOI: https://doi.org/10.1016/s0925-8388(98)00658-6

[4] X. Li, Y. Yang, X. Cheng, Ultrasonic-assisted fabrication of metal matrix nanocomposites, J. Mater. Sci. 39 (2004) 3211-3212.

DOI: https://doi.org/10.1023/b:jmsc.0000025862.23609.6f

[5] D. Roy, S. Ghosh, A. Basumallick, B. Basu, Preparation of Ti-aluminide reinforced in situ aluminum matrix composites by reactive hot pressing, J. Alloys Compd. 436 (2007) 107-111.

DOI: https://doi.org/10.1016/j.jallcom.2006.07.017

[6] J.B. Fogagnolo, F. Velasco, M.H. Robert, J.M. Torralba, Effect of mechanical alloying on the morphology, microstructure and properties of aluminum matrix composite powders, Mater. Sci. Eng. A 342 (2003) 131-143.

DOI: https://doi.org/10.1016/s0921-5093(02)00246-0

[7] F. Akhlaghi, S.A. Pelaseyyed, Characterization of aluminum/graphite particulate composites synthesized using a novel method termed in situ powder metallurgy, Mater. Sci. Eng. A 385 (2004) 258-266.

DOI: https://doi.org/10.1016/s0921-5093(04)00876-7

[8] J. Hashim, L. Looney, M.S.J. Hashmi, The enhancement of wettability of SiC particles in cast aluminum matrix composites, J. Mater. Process. Technol. 119 (2001), 329-335.

DOI: https://doi.org/10.1016/s0924-0136(01)00919-0

[9] R. Vaben, D. Stover, Oxidation of ultrafine (Si-)SiC powders, Mater. Sci. Eng. 29 (1994) 3791-3796.

[10] M. Khakbiz, F. Akhlaghi, Synthesis and structural characterization of Al-B4C nanocomposite powders by mechanical alloying, J. Alloys Compd. 479 (2009), 334-341.

DOI: https://doi.org/10.1016/j.jallcom.2008.12.076

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