Microstructures of Alumina-Aluminium/Magnesium Interpenetrating Composites

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Interpenetrating composites allow a completely 3-dimensional matrix of two phases, in this case an alumina (ceramic) and aluminium-magnesium alloy (metal), to be developed. This 3-dimensionality yields a material with mechanical and physical properties that are superior to either the metal or ceramic individually. The composites were produced by heating an alumina foam and aluminium-magnesium alloys together in flowing nitrogen to in excess of 900°C. At these temperatures the alloy is drawn into the ceramic foam by capillary action. The infiltration process is dependent on the interaction of the alloy with the nitrogen atmosphere in the furnaces. This complex interaction and its affect on the microstructural development has been studied using Electron Backscatter Diffraction (EBSD) coupled with Energy Dispersive x-ray Spectroscopy (EDS).

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

1279-1284

DOI:

10.4028/www.scientific.net/MSF.519-521.1279

Citation:

R.L. Higginson et al., "Microstructures of Alumina-Aluminium/Magnesium Interpenetrating Composites", Materials Science Forum, Vols. 519-521, pp. 1279-1284, 2006

Online since:

July 2006

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$35.00

[1] R.F. Smart, M. VC. Bacon, G.M. Coldrick and J.R. Parkin: Conference Proceedings and the AE symposium, (1982).

[2] S.C. Tjong and Z.Y. Ma: Materials Science and Engineering R: Reports, 29, 3-4, (2000), p.49.

[3] Clarke DR, J Am Ceram Soc, 75, 4, (1992), p.739.

[4] A. Mortensen: Metal Matrix Composites, 3, Ed. T.W. Clyne, Elsevier, (2000), p.521.

[5] P. Sepulveda and J.G.P. Binner: Journal of the European Ceramic Society, 19, 12, (1999), p. (2059).

[6] R.A. Saravanan, J.M. Molina, J. Narciso, C. García-Cordovilla and E. Louis, Scripta Materialia: 44, 6, (2001), p.965.

[7] X.B. Zhou, and J.T.M. De Hosson: Acta Mater., 44, 2, (1996), p.421.

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