Skip to main content Accesibility Help

Sol-gel coatings to improve processing of aluminium matrix SiC reinforced composite materials

  • J. Rams (a1), M. Campo (a1) and A. Ureña (a1)

This paper analyses the influence of the inner structure of a SiO2 coating deposited on SiC particles by a sol-gel route on reactivity and wettability between SiC particles and molten aluminium during composite manufacturing. Different heat treatments were applied to the sol-gel coatings to change the porous structure of the amorphous silica. The coatings subjected to the mildest heat treatment were more reactive with molten aluminium, enriching the Si content of the matrix composite, and hence inhibiting direct reaction of the SiC particles and the formation of aluminium carbide. Thermal analysis showed that Si enrichment altered the solidification behavior of the aluminium matrix and its resultant microstructure, influencing the manufacturing conditions and final properties of the fabricated composites.

Hide All
1.Viala, J.C., Fortier, P. and Bouix, J.Stable and metastable phase equilibria in the chemical interaction between aluminium and silicon carbide. J. Mater. Sci. 25, 1842 (1990).
2.Rajan, T.P.D., Pillai, R.M. and Pai, B.C.Review Reinforcement coatings and interfaces in aluminium metal matrix composites. J. Mater. Sci. 33, 3491 (1998).
3.Suéry, M., L’Espérance, G., Hong, B.D., Thanh, L. Nguyen and Bordeaux, F.Development of particulate treatments and coatings to reduce SiC degradation by liquid aluminium. J. Mater. Eng. Perf. 2, 365 (1993).
4.Kindl, B., Teng, Y.H. and Liu, Y.L.Protective coatings for commercial particulates. Composites 25, 671 (1994).
5.Shi, J.M. Zhongliang, Yang, J.C., Lee, D.Z., Lee, H.I. and Wu, R.: The interfacial characterization of oxidized SiCp/2014 Al composites. Mater. Sci. Eng. A 303, 46 (2001).
6.Ureña, A., Rodrigo, P., Gil, L., Escalera, M.D. and Baldonedo, J.L.Interfacial reaction in an Al–Cu–Mg 2009/SiCw composite during liquid processing. Part I. Casting. J. Mater. Sci. 36, 419 (2001).
7.Ureña, A., Escalera, M.D., Rodrigo, P., Baldonedo, J.L. and Gil, L.Active coatings for SiC particles to reduce the degradation by liquid aluminium during processing of aluminium matrix composites: Study of interfacial reactions. J. Microsc. 201, 1 (2001).
8.Rams, J., Campo, M. and Ureña, A. Sol-Gel Coatings as active barriers to protect ceramic reinforcement in aluminium matrix composites. Adv. Eng. Mater. 6, 57 (2004).
9.Massalski, T.B. and Murray, J.L.: Binary Alloy Phase Diagrams, edited by Bennett, L.H. and Baker, H. (American Society for Metals Park, Metals Park, Ohio, 1986), p. 165.
10.Hughes, A.E., Hedges, M.M. and Sexton, B.A.Reactions at the Al/SiO2/SiC layered interface. J. Mater. Sci. 25, 4856 (1990).
11.Luo, Z.P., Song, Y.G. and Zhang, S.Q.A TEM study of the microstructure of SiCp/Al composite prepared by pressureless infiltration method. Scripta Mater. 45, 1183 (2001).
12.Laurent, V., Chatain, D. and Eustathopoulous, N.Wettability of SiO2 and oxidized SiC by aluminium. Mater. Sci. Eng. A 135, 89 (1987).
13.Aksay, I., Hoye, C. and Pask, J.Wetting under chemical-equilibrium and nonequilibrium conditions. J. Phys. Chem. 78, 1178 (1974).
14.Isaikin, A.S., Chubarov, V.M., Tretilov, B.F., Silaer, V.A. and Goselor, Y.A.Compatibility of carbon filaments with a carbide coating and an aluminium matrix. Mater. Sci. Heat Treat. 22, 815 (1980).
15.Ureña, A., Escalera, M.D. and Gil, L.Oxidation barriers on SiC particles for use in aluminium matrix composites manufactured by casting route: Mechanisms of interfacial protection. J. Mater. Sci. 37, 4633 (2002).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed