Study of Wear Properties of Al-SiC Composites

Manoj Singla, Lakhvir Singh, Vikas Chawla

Department of Materials & Metallurgical Engineering, I.I.T. Roorkee (Uttaranchal) , INDIA.
Department of Mechanical Engineering, BBSBEC, Fatehgarh Sahib (Pb.), INDIA.
Department of Mechanical Engineering, R.I.E.I.T., Railmajra, Distt. Nawanshahr (Pb.)-144533, INDIA.

DOI: 10.4236/jmmce.2009.810070                

Abstract

Al–SiC composites containing four different weight percentages 5%, 10%, 20% and 25% of SiC have been fabricated by liquid metallurgy method. Friction and wear characteristics of Al–SiC composites have been investigated under dry sliding conditions and compared with those observed in pure aluminium. Dry sliding wear tests have been carried out using pin-on-disk wear test rate normal loads of 5, 7, 9 and 11 Kgf and at constant sliding velocity of 1.0m/s. Weight loss of samples was measured and the variation of cumulative wear loss with sliding distance has been found to be linear for both pure aluminium and the composites. It was also observed that the wear rate varies linearly with normal load but lower in composites as compared to that in base material. The wear mechanism appears to be oxidative for both pure aluminium and composites under the given conditions of load and sliding velocity as indicated by scanning electron microscope (SEM) of the worn surfaces. Further, it was found from the experimentation that the wear rate decreases linearly with increasing weight fraction of silicon carbide and average coefficient of friction decreases linearly with increasing normal load and weight fraction of SiC. The best results have been obtained at 20% weight fraction of 320 grit size SiC particles for minimum wear.

Keywords

Metal Matrix Composites MMC’s, Silicon Carbide SiC

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Naher, S., Brabazon, D. and Looney, L. (2003), “Simulation of the stir casting process”, Journal of Materials Processing Technology, Vol. 143-144, pp. 567-571.
[2]	Balasivanandha, S., Kaarunamoorthy, L., Kaithiresan, S. and Mohan, B. (2006), “Influence of stirring speed and stirring time on distribution of particles in cast metal matrix composite”, Journal of Material Processing Technology, Vol. 171, pp. 268-273.
[3]	Chen. M.Y. (2002), “Friction behaviour of co- continuous alumina/aluminium composites with & without SiC reinforcement”, Wear, Vol. 249, pp. 868-876.
[4]	Dasgupta Rupa, (2005) “SiC particulate dispersed composites of an Al–Zn–Mg–Cu alloy:Property comparison with parent alloy”, Material Characterization, Vol. 54, pp. 438-445.
[5]	Hashim. J. (19990, “Metal matrix composites: production by stir casting method”, Journal of Material Processing Technology, Vol. 92-93, pp. 1-7.
[6]	Lim. S.C., Gupta M., Ren. L., Kwok. J.K.M., “ The tribological properties of Al-Cu/SiCp metal-matrix composites fabricated using the rheocasting technique”, Journal of Materials Processing Technology, Vol. (89-90), pp. 591-596..
[7]	Mares, M. (2001), “ Some issues on tailoring possibilities for mechanical properties of particulate reinforced metal matrix composites” Journal of Optoelectronics and Advanced Materials, Vol. 3 (1), pp. 119 – 124.
[8]	Min Zhao, Gaohui Wu, Longtao Jiang, Zuoyong Dou,(2005) “ Friction and wear properties of TiB2P /Al Composite”, Composites Part: applied science and manufacturing,
[9]	Naher, S., Brabazon, D. and Looney, L. (2004), “Development and assessment of a new quick quench stir caster design for the production of metal matrix composites”, Journal of Material Processing Technology, Vol. 166, pp. 430-439.
[10]	Rajnesh, T. (2005), “Synthesis and tribological characterization of in-situ cast Al-TiC composites”, Journal of Wear, 259, pp. 569-576.
[11]	Rohatgi, P.K., Sobezak, J., Asthana, R. and Kim, J.K.(1998), “Inhomogeneities in silicon carbide distribution in stirred liquids-water model study for synthesis of composites”, Materials Science and Engineering , Vol.252 (1), pp. 98-99.