Theoretical and Practical Aspects Regarding Al-SiC Particles Composites Obtaining by Casting

Abstract:

The paper presents the principal aspects regarding the obtaining of the mixture aluminium - silicon carbide particles. It is discussed about the wetting conditions and the critical acceleration necessary for the incorporation of particles into the melt. The high values obtained for this parameter involve applying some methods to improve the wettability: the covering of the complementary material with a thin layer of Ni, the alloying of the aluminium melt, the overheating of the metallic bath and the heat treatment of the silicon carbide particles. Also, the mechanical stirring conditions necessary to realize the mixture are presented. The settling process of the silicon carbide particles in the melt as a function of particles size, shape and volumetric concentration is also analysed. The presence of complementary material leads to the growth of the mixture viscosity. Therefore, the liquid alloy was investigated like a continuous medium in connection with the apparent viscosity. The main aspects regarding the solidification of metallic composites processed by casting method based upon theoretical concepts, general knowledge about casting of composites and experimental data are discussed. Finally, the specific defects caused by an insufficiently controlled solidification process and prevention measures are shown.

• Periodical: Solid State Phenomena (Volume 188)
• Pages: 134-139
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.188.134
• Online since: May 2012
• Authors: Gigel Neagu, Florin Ştefănescu, Alexandrina Mihai, Iuliana Stan, Iuliana Odagiu
• Keywords: Aluminum (Al), Settling Process, Silicon Carbide Particles, Solidification, Specific Defects, Viscosity, Wettability

References

[1] R. Bauri and M.K. Surappa: Metallurgical and Materials Transactions A 36A (March 2005), pp.667-673

[2] R. Bauri and, M.K. Surappa: Science and Technology of Advanced Materials 8 (2007), pp.494-502

[3] S. Balasivanandha Prabu, L. Karunamoorthy, S. Kathiresan and B. Mohan: Journal of Materials Processing Technology 171 (2006), pp.268-273

[4] B.C. Pai, G. Ramani, R.M. Pillai and K.G. Satyanarayana: Journal of Materials Science 30 (1995), pp.1903-1911

[5] A. Ureña, E. Martínez, P. Rodrigo and L. Gil: Composites Science and Technology 64 (2004), pp.1843-1854

[6] J.C. Lee, J.P. Ahn, Z. Shi, J.H. Shim and H.I. Lee: Metallurgical and Materials Transactions A 32A (June 2001), pp.1541-1550

[7] V. Laurent, D. Chatain and N. Eustathopoulos: Journal of Materials Science 22 (1987), pp.244-250

[8] P.K. Rohatgi in: Metals Handbook, Ninth Edition, Vol. 15, Casting, ASM International (1988), pp.840-854

[9] Do-Suck Han, H. Jones and H.V. Atkinson: Journal of Materials Science 28 (1993), pp.2654-2658

[10] N. Sobczak, M. Ksiazek, W. Radziwill, J. Morgiel, W. Baliga and L. Stobierski in: Proceedings of International Conference "High Temperature capillarity", Cracow, Poland (1997), pp.138-145

[11] J. Hashim, L. Looney and M.S.J. Hashmi:, Journal of Materials Processing Technology 119 (2001), pp.324-328

[12] E. Candan: Turkish Journal of Engineering & Environmental Sciences 26 (2002), pp.1-5

[13] N. Shinozaki, T. Fujita and K. Mukai: Mettalurgical and Materials Transactions B, 33B (June 2002), pp.506-509

[14] A.S. Kacar, F. Rana and D.M. Ştefănescu: Materials Science and Engineering, A l35 (1991), pp.95-100

[15] C. Garcia-Cordovilla, E. Louis and A. Pamies: Journal of Materials Science 21 (1986), pp.2787-2792

[16] D. Poirier and K. Yeum: Light Metals 12 (1988), pp.469-476

[17] P. Shen, H. Fujii, T. Matsumoto and K. Nogi: Journal of Materials Science 40 (2005), pp.2329-2333

[18] B.J. Keene: International Materials Review 38/4 (1993), pp.157-192

[19] W. Zhou and M.Z. Xu: Journal of Materials Processing Technology 63 (1997), pp.358-363

[20] G.S. Hanumanth and G.A. Irons in: Proceedings of International Conference on Fabrication of Particulates Reinforced Metal Composites, Montreal, Québec, Canada (1990), pp.41-46

[21] F. Rana, B.K. Dhindaw and D.M. Ştefănescu: AFS Transactions (1989), pp.255-264

[22] P.K. Ghosh and S. Raz: JIM, (June 1988), pp.503-508

[23] A. Ourdjini, K.C. Chew and B.T. Khoo: Journal of Materials Processing Technology 116 (2001), pp.72-76

[24] Fl. Ştefănescu, G. Neagu and A. Mihai: U.P.B. Scientific Bulletin 69B (2007), pp.47-58